<?xml version="1.0"?>
<doi_batch xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.crossref.org/schema/4.4.0" xmlns:fr="http://www.crossref.org/fundref.xsd" xmlns:ct="http://www.crossref.org/clinicaltrials.xsd" xmlns:ai="http://www.crossref.org/AccessIndicators.xsd" xmlns:rel="http://www.crossref.org/relations.xsd" xmlns:jats="http://www.ncbi.nlm.nih.gov/JATS1" version="4.4.0" xsi:schemaLocation="http://www.crossref.org/schema/4.4.0 crossref4.4.0.xsd">
  <head>
    <doi_batch_id>TODENTJ-25-03-2019_TODENTJ-4-13</doi_batch_id>
    <timestamp>1553505129</timestamp>
    <depositor>
      <depositor_name>Bentham Open</depositor_name>
      <email_address>doi@benthamopen.net</email_address>
    </depositor>
    <registrant>Bentham Open</registrant>
  </head>
  <body>
    <journal>
      <journal_metadata language="en">
        <full_title>The Open Dentistry Journal</full_title>
        <abbrev_title>TODENTJ</abbrev_title>
        <issn media_type="print">1874-2106</issn>
      </journal_metadata>
      <journal_issue>
        <publication_date media_type="print">
          <month>3</month>
          <day>1</day>
          <year>2010</year>
        </publication_date>
        <journal_volume>
          <volume>4</volume>
        </journal_volume>
        <issue>1</issue>
      </journal_issue>
      <journal_article publication_type="full_text">
        <titles>
          <title>The Effect of Age on the Gingival Crevicular Fluid Composition During Experimental Gingivitis. A Pilot Study</title>
        </titles>
        <contributors>
          <person_name contributor_role="author" sequence="first">
            <given_name>Lazaros</given_name>
            <surname>Tsalikis</surname>
          </person_name>
        </contributors>
        <jats:abstract>
                <jats:sec>
        		<jats:title>Background:</jats:title>
              <jats:p>Cytokines have been proposed as potentially useful diagnostic or prognostic markers of periodontal inflammation related alterations during the experimental gingivitis model. The role of ageing in periodontal disease needs further elucidation; therefore investigations of its influence on host response are needed.</jats:p>
                  </jats:sec>  
             <jats:sec>
        		<jats:title>Objective:</jats:title>
                <jats:p>To study the effect of age on interleukins IL -6, IL-8 and TNF-a levels in gingival crevicular fluid (GCF) and their correlations to clinical parameters during experimental gingivitis.</jats:p>
                 <jats:p>Materials and Methods: Five young subjects (20-22 years old) and five old subjects (61-65 years old), all periodontal healthy, participated in this clinical trial. A professional plaque control programme was undertaken to establish healthy gingival conditions at baseline. Plaque index (PI), gingival index (GI) were recorded at 60 sites at baseline, after 21 days of no oral hygiene and one week later after professional cleaning and reestablishment of oral hygiene procedures. A total of 180 samples were analyzed with ELISA for levels of IL -6, IL-8 and TNF-a in gingival crevicular fluid. The examination included the mesiobuccal sites of the Ramfjord teeth. Comparisons between and within groups were performed by non-parametric tests (Mann- Withney) and correlations were sought for with Wilcoxon test. Significance was set at p=0.05.</jats:p>
             </jats:sec>
            <jats:sec>
        		<jats:title>Results:</jats:title>
              <jats:p>Results showed significant diferences between the two groups with regard to the plaque and bleeding scores and GCF volume, all of which proved to be more pronounced in old group. With respect to laboratory data, mean cytokine concentrations were in general lower in young group. TNF-a had a steady increase for the adults, which was found to be statistically significant between Days 0 and 21, IL-8 showed a statistically significant decrease at Day 28 in the young group and finally IL-6 showed a fluctuation, which was totally adverse for the two groups at each time point.</jats:p>
                  </jats:sec>  
               <jats:sec>
        		<jats:title>Conclusion:</jats:title>
              <jats:p>Within the limitations of the present study, age cannot be identified as a factor that strongly affects the cytokine expression and fluctuations even in a well-controlled environment of inflammation, such as experimental gingivitis.</jats:p>
                  </jats:sec>  
            </jats:abstract>
        <publication_date>
          <month>3</month>
          <day>1</day>
          <year>2010</year>
        </publication_date>
        <pages>
          <first_page>13</first_page>
          <last_page>26</last_page>
        </pages>
        <publisher_item>
          <identifier id_type="sici">TODENTJ-4-13</identifier>
        </publisher_item>
        <crossmark>
          <crossmark_version>1</crossmark_version>
          <crossmark_policy>10.2174/crossmark_policy</crossmark_policy>
          <crossmark_domains>
            <crossmark_domain>
              <domain>opendentistryjournal.com</domain>
            </crossmark_domain>
            <crossmark_domain>
              <domain>benthamopen.com</domain>
            </crossmark_domain>
          </crossmark_domains>
          <crossmark_domain_exclusive>true</crossmark_domain_exclusive>
          <custom_metadata>
            <assertion name="review_status" label="Review Status" group_name="peer_review_details" group_label="Peer Review Details" order="0">Peer Reviewed</assertion>
            <assertion name="review_process" label="Review Process" group_name="peer_review_details" group_label="Peer Review Details" order="1">Single blind</assertion>
            <assertion name="screening_status" label="Screening Status" group_name="plagiarism_screening" group_label="Plagiarism Screening" order="0">Checked with iThenticate</assertion>
            <assertion name="received" label="Received" group_name="publication_history" group_label="Publication History" order="0">2009-5-4</assertion>
            <assertion name="revised" label="Revised" group_name="publication_history" group_label="Publication History" order="1">2009-6-17</assertion>
            <assertion name="accepted" label="Accepted" group_name="publication_history" group_label="Publication History" order="2">2009-10-21</assertion>
            <assertion name="published" label="Published" group_name="publication_history" group_label="Publication History" order="3">2010-3-1</assertion>
            <ai:program name="AccessIndicators">
              <ai:license_ref>http://creativecommons.org/licenses/by-nc/3.0/</ai:license_ref>
            </ai:program>
          </custom_metadata>
        </crossmark>
        <doi_data>
          <doi>10.2174/1874210601004010013</doi>
          <timestamp>1553505129</timestamp>
          <resource>https://opendentistryjournal.com/VOLUME/4/PAGE/13/</resource>
          <collection property="crawler-based">
            <item crawler="google">
              <resource>https://opendentistryjournal.com/contents/volumes/V4/TODENTJ-4-13/TODENTJ-4-13.pdf</resource>
            </item>
            <item crawler="msn">
              <resource>https://opendentistryjournal.com/contents/volumes/V4/TODENTJ-4-13/TODENTJ-4-13.pdf</resource>
            </item>
            <item crawler="altavista">
              <resource>https://opendentistryjournal.com/contents/volumes/V4/TODENTJ-4-13/TODENTJ-4-13.pdf</resource>
            </item>
            <item crawler="yahoo">
              <resource>https://opendentistryjournal.com/contents/volumes/V4/TODENTJ-4-13/TODENTJ-4-13.pdf</resource>
            </item>
            <item crawler="scirus">
              <resource>https://opendentistryjournal.com/contents/volumes/V4/TODENTJ-4-13/TODENTJ-4-13.pdf</resource>
            </item>
            <item crawler="iParadigms">
              <resource>https://opendentistryjournal.com/contents/volumes/V4/TODENTJ-4-13/TODENTJ-4-13.pdf</resource>
            </item>
          </collection>
          <collection property="text-mining">
            <item>
              <resource mime_type="application/pdf">https://opendentistryjournal.com/contents/volumes/V4/TODENTJ-4-13/TODENTJ-4-13.pdf</resource>
            </item>
            <item>
              <resource mime_type="application/xml">https://opendentistryjournal.com/contents/volumes/V4/TODENTJ-4-13/TODENTJ-4-13.xml</resource>
            </item>
          </collection>
        </doi_data>
        <citation_list>
          <citation key="refR1">
            <journal_title>J Periodont Res</journal_title>
            <author>Deinzer R</author>
            <volume>42</volume>
            <first_page>318</first_page>
            <cYear>2007</cYear>
            <unstructured_citation>
                    Deinzer R, Weik U, Kolb-Bachofen V, Herforth A. 
                    Comparison of experimental gingivitis with persistent gingivitis: differences in clinical and cytokine concentrations 
                    J Periodont Res  
                    2007; 
                    42
                    : 318-24.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR2">
            <journal_title>J Dent Res</journal_title>
            <author>Van Dyke TE</author>
            <volume>82</volume>
            <first_page>82</first_page>
            <cYear>2003</cYear>
            <unstructured_citation>
                    Van Dyke TE, Serhan CN. 
                    Resolution of inflammation: a new paradigm for the pathogenesis of periodontal diseases 
                    J Dent Res  
                    2003; 
                    82
                    (2)
                    : 82-90.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR3">
            <journal_title>J Periodontol</journal_title>
            <author>Loe H</author>
            <volume>36</volume>
            <first_page>5</first_page>
            <cYear>1965</cYear>
            <unstructured_citation>
                    Loe H, Theilade E, Jensen SB. 
                    Experimental gingivitis in man 
                    J Periodontol  
                    1965; 
                    36
                    : 5-15.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR4">
            <journal_title>J Periodontol</journal_title>
            <author>Genco RJ</author>
            <volume>63</volume>
            <first_page>338</first_page>
            <cYear>1992</cYear>
            <unstructured_citation>
                    Genco RJ. 
                    Host responses in periodontal diseases: current concepts 
                    J Periodontol  
                    1992; 
                    63
                    : 338-55.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR5">
            <journal_title>J Clin Periodontol</journal_title>
            <author>Deinzer R</author>
            <volume>26</volume>
            <first_page>1</first_page>
            <cYear>1999</cYear>
            <unstructured_citation>
                    Deinzer R, Forster P, Fuck L, Herforth A, Stiller-Winkel R, Idel H. 
                    Increase of crevicular interleukin 1 beta under academic stress at experimental gingivitis sites and at sites of perfect oral hygiene 
                    J Clin Periodontol  
                    1999; 
                    26
                    : 1-8.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR6">
            <journal_title>J Periodontol Res</journal_title>
            <author>Birkedal-Hansen H</author>
            <volume>28</volume>
            <first_page>500</first_page>
            <cYear>1993</cYear>
            <unstructured_citation>
                    Birkedal-Hansen H. 
                    Role of cytokines and inflammatory mediatorsin tissue destruction 
                    J Periodontol Res  
                    1993; 
                    28
                    : 500-10.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR7">
            <journal_title>J Periodontol</journal_title>
            <author>Preiss DS</author>
            <volume>65</volume>
            <first_page>423</first_page>
            <cYear>1994</cYear>
            <unstructured_citation>
                    Preiss DS, Meyle J. 
                    Interleukin-1 beta concentration of gingival crevicular fluid 
                    J Periodontol  
                    1994; 
                    65
                    : 423-8.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR8">
            <journal_title>Arch Oral Biol</journal_title>
            <author>Kinane DF</author>
            <volume>37</volume>
            <first_page>153</first_page>
            <cYear>1992</cYear>
            <unstructured_citation>
                    Kinane DF, Winstanley FP, Adonogianaki E, Moughal NA. 
                    Bioassay of interleukin 1 (IL-1) in human gingival crevicular fluid during experimental gingivitis 
                    Arch Oral Biol  
                    1992; 
                    37
                    (2)
                    : 153-6.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR9">
            <journal_title>J Int Acad Periodontol</journal_title>
            <author>Tsalikis L</author>
            <volume> 4</volume>
            <first_page>5</first_page>
            <cYear>2002</cYear>
            <unstructured_citation>
                    Tsalikis L, Parapanisiou E, Bata-Kyrkouy A, Polymenides Z, Konstantinidis A. 
                    Crevicular fluid levels of interleukin-1alpha and interleukin 1-beta during experimental gingivitis in young and old adults 
                    J Int Acad Periodontol  
                    2002; 
                     4
                    : 5-11.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR10">
            <journal_title>J Periodontal Res</journal_title>
            <author>Masada MP</author>
            <volume>25</volume>
            <first_page>156</first_page>
            <cYear>1990</cYear>
            <unstructured_citation>
                    Masada MP, Persson R, Kenny JS, Lee SW, Page RC, Allisson MC. 
                    Measurement of intreleukin -1a and -1b in gingival crevicular fluid: implications for the pathogenesisof periodontal disease 
                    J Periodontal Res  
                    1990; 
                    25
                    : 156-63.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR11">
            <journal_title>J Clin Periodontol</journal_title>
            <author>Reinhardt RA</author>
            <volume>20</volume>
            <first_page>514</first_page>
            <cYear>1993</cYear>
            <unstructured_citation>
                    Reinhardt RA, Masada MP, Johnson GK, Dubois LM, Seymour GJ, Allisson AC. 
                    IL-1 in gingival crevicular fluid following closed root planing and papillary flap debridement 
                    J Clin Periodontol  
                    1993; 
                    20
                    : 514-19.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR12">
            <journal_title>Crit Care Med</journal_title>
            <author>Beutler B</author>
            <volume>21</volume>
            <first_page>423</first_page>
            <cYear>1993</cYear>
            <unstructured_citation>
                    Beutler B, Grau GE. 
                    Tumor necrosis factor in the pathogenesis of infectious diseases 
                    Crit Care Med  
                    1993; 
                    21
                    : 423-35.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR13">
            <journal_title>Chest</journal_title>
            <author>Holmes CL</author>
            <volume>124</volume>
            <first_page>1103</first_page>
            <cYear>2003</cYear>
            <unstructured_citation>
                    Holmes CL, Russell JA, Walley KR. 
                    Genetic polymorphisms in sepsis and septic shock: role in prognosis and potential for therapy 
                    Chest  
                    2003; 
                    124
                    : 1103-5.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR14">
            <journal_title> Blood</journal_title>
            <author>Murray J</author>
            <volume>90</volume>
            <first_page>2772</first_page>
            <cYear>1997</cYear>
            <unstructured_citation>
                    Murray J, Barbara J, Dankley S, et al. 
                    Regulation of neutrophil apoptosis by tumor necrosis factor-A. requirements for TNF-R55 and TNF-R75 for induction of apoptosis in vivo 
                     Blood  
                    1997; 
                    90
                    (7)
                    : 2772-83.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR15">
            <unstructured_citation>
                    Tracey K, Cerami A. 
                    
                    Metabolic response to cachectin/TNF annals of the New York academy of sciences.  
                    New York: Academy of Sciences 1990; vol. 587: pp. 
                    
                    
                    
                    pp. 325-30.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR16">
            <journal_title>Circulation</journal_title>
            <author>Ridker PM</author>
            <volume>109</volume>
            <first_page>IV6</first_page>
            <cYear>2004</cYear>
            <unstructured_citation>
                    Ridker PM, Brown NJ, Vaughan DE, Harrison DG, Mehta JL. 
                    Established and emerging plasma biomarkers in the prediction of first atherothrombotic events 
                    Circulation  
                    2004; 
                    109
                    (25 Suppl 1)
                    : IV6-19.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR17">
            <journal_title>Oral Dis</journal_title>
            <author>Wiebe SH</author>
            <volume>2</volume>
            <first_page>167</first_page>
            <cYear>1996</cYear>
            <unstructured_citation>
                    Wiebe SH, Hafezi M, Sandhn HS, Sims SM, Dixon SJ. 
                    Osteoclast activation in inflammatory periodontal diseases 
                    Oral Dis  
                    1996; 
                    2
                    : 167-80.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR18">
            <journal_title>J Periodontal Res</journal_title>
            <author>Yamamoto M</author>
            <volume>32</volume>
            <first_page>115</first_page>
            <cYear>1997</cYear>
            <unstructured_citation>
                    Yamamoto M, Fujihashi K, McGhee JR, Vandyke TE, Kiyono H. 
                    Molecular and cellular mechanisms for periodontal diseases: role of cytokines in induction of mucosal inflammation 
                    J Periodontal Res  
                    1997; 
                    32
                    : 115-9.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR19">
            <journal_title>J Periodontol</journal_title>
            <author>Bickel M</author>
            <volume>64</volume>
            <first_page>456</first_page>
            <cYear>1993</cYear>
            <unstructured_citation>
                    Bickel M. 
                    The role of IL-8 in inflammation and mechanisms of regulation 
                    J Periodontol  
                    1993; 
                    64
                    : 456-60.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR20">
            <journal_title>Nature</journal_title>
            <author>Baggiolini M</author>
            <volume>392</volume>
            <first_page>564</first_page>
            <cYear>1998</cYear>
            <unstructured_citation>
                    Baggiolini M. 
                    Chemokines and leukocyte traffic 
                    Nature  
                    1998; 
                    392
                    : 564-8.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR21">
            <journal_title>J Periodontol</journal_title>
            <author>Tsai CC</author>
            <volume>66</volume>
            <first_page>852</first_page>
            <cYear>1995</cYear>
            <unstructured_citation>
                    Tsai CC, Ho YP, Chen CC. 
                    Levels of interleukin-1b and interleukin-8 in gingival crevicular fluids in adult periodontitis 
                    J Periodontol  
                    1995; 
                    66
                    : 852-9.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR22">
            <journal_title>J Periodontal Res</journal_title>
            <author>Mathur A</author>
            <volume>31</volume>
            <first_page>489</first_page>
            <cYear>1996</cYear>
            <unstructured_citation>
                    Mathur A, Michalowic ZB, Castillo M, Aeppli D. 
                    Interleukin-1 alpha, interleukin-8 and interferon-alpha levels in gingival crevicular fluid 
                    J Periodontal Res  
                    1996; 
                    31
                    : 489-5.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR23">
            <journal_title>J Clin Periodontol</journal_title>
            <author>Giannopoulo UC</author>
            <volume>30</volume>
            <first_page>145</first_page>
            <cYear>2003</cYear>
            <unstructured_citation>
                    Giannopoulo UC, Kamma J, Mombelli A. 
                    Effect of inflammation, smoking and stress on gingival crevicular fluid cytokine level 
                    J Clin Periodontol  
                    2003; 
                    30
                    : 145-53.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR24">
            <journal_title>J Clin Periodontol</journal_title>
            <author>Shearer B</author>
            <volume>32</volume>
            <first_page>784</first_page>
            <cYear>2005</cYear>
            <unstructured_citation>
                    Shearer B, Hall P, Clarke P, Marshall G, Kinane DF. 
                    Reducing variability and choosing ideal subjects for experimental gingivitis studies 
                    J Clin Periodontol  
                    2005; 
                    32
                    (7)
                    : 784-8.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR25">
            <journal_title> Acta Odont Scand</journal_title>
            <author>Loe H</author>
            <volume>21</volume>
            <first_page>533</first_page>
            <cYear>1963</cYear>
            <unstructured_citation>
                    Loe H, Silness J. 
                    Periodontal disease in pregnancy. I. prevalence and severity 
                     Acta Odont Scand  
                    1963; 
                    21
                    : 533-1.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR26">
            <journal_title>Acta Odont Scand</journal_title>
            <author>Silness J</author>
            <volume>22</volume>
            <first_page>121</first_page>
            <cYear>1964</cYear>
            <unstructured_citation>
                    Silness J, Loe H. 
                    Periodontal disease in pregnancy. II. correlation between oral hygiene and periodontal condition 
                    Acta Odont Scand  
                    1964; 
                    22
                    : 121-35.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR27">
            <journal_title>J Periodontol</journal_title>
            <author>Hinrichs JL</author>
            <volume>55</volume>
            <first_page>294</first_page>
            <cYear>1984</cYear>
            <unstructured_citation>
                    Hinrichs JL, Brandt CC, Smith JA. 
                    Relative error (variability) associated with an improved instrument for measuring gingival crevicular fluid 
                    J Periodontol  
                    1984; 
                    55
                    : 294-8.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR28">
            <unstructured_citation>
                    Mehta C, Patel R. 
                    
                    Exact permutational inference for categorical and nonparametric data In: Hoyle R, Ed. 
                    Statistical strategies for small sample research.  
                    Thousand Oaks: Sage Publications 1999; pp. 
                    
                    
                    133-66.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR29">
            <journal_title>J Prosth Dent</journal_title>
            <author>Tsiggos N</author>
            <volume>100</volume>
            <first_page>41</first_page>
            <cYear>2008</cYear>
            <unstructured_citation>
                    Tsiggos N, Tortopidis D, Hatzikyriakos A, Menexes G. 
                    Association between self-reported bruxism activity and occurrence of dental attrition, abfraction, and occlusal pits on natural teeth 
                    J Prosth Dent  
                    2008; 
                    100
                    : 41-6.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR30">
            <journal_title>Periodontology 2000</journal_title>
            <author>Champagne ME</author>
            <volume>31</volume>
            <first_page>167</first_page>
            <cYear>2003</cYear>
            <unstructured_citation>
                    Champagne ME, Buchanan W, Reddy M, Preisser JS, Offenbacher S. 
                    Potential for gingival crevice fluid measures as predictrors of risk for periodontal diseases 
                    Periodontology 2000  
                    2003; 
                    31
                    : 167-80.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR31">
            <journal_title>Electoral Stud</journal_title>
            <author>Jacoby R</author>
            <volume>19</volume>
            <first_page>577</first_page>
            <cYear>2000</cYear>
            <unstructured_citation>
                    Jacoby R. 
                    Loess: a nonparametric, graphical tool for depicting relationships between variables 
                    Electoral Stud  
                    2000; 
                    19
                    : 577-613.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR32">
            <unstructured_citation>
                    Nyvad B. 
                    Tidlig bacteria eakkumulation pa emalje og rodoverflader in vivo  
                    Sammenlignende ultrastructurelle og mikribiologiske undersogelserThesis Aarthus: Royal Dental College. 
                    1983.
                </unstructured_citation>
          </citation>
          <citation key="refR33">
            <journal_title>J Clin Periodontol</journal_title>
            <author>Holm-Pedersen P</author>
            <volume>2</volume>
            <first_page>14</first_page>
            <cYear>1975</cYear>
            <unstructured_citation>
                    Holm-Pedersen P, Agerbaek N, Theilade E. 
                    Experimental gingivitis in young and elderly individuals 
                    J Clin Periodontol  
                    1975; 
                    2
                    : 14-24.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR34">
            <journal_title>J Clin Periodontol</journal_title>
            <author>Fransson C</author>
            <volume>23</volume>
            <first_page>379</first_page>
            <cYear>1996</cYear>
            <unstructured_citation>
                    Fransson C, Berglundh T, Lindhe J. 
                    The effect of age on the development of gingivitis. Clinical, microbiological and histological findings 
                    J Clin Periodontol  
                    1996; 
                    23
                    : 379-85.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR35">
            <journal_title>J Clin Periodontol</journal_title>
            <author>Berglundh T</author>
            <volume>20</volume>
            <first_page>179</first_page>
            <cYear>1993</cYear>
            <unstructured_citation>
                    Berglundh T, Lindhe J. 
                    Gingivitis in young and old dogs 
                    J Clin Periodontol  
                    1993; 
                    20
                    (3)
                    : 179-85.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR36">
            <journal_title>J Clin Periodontol</journal_title>
            <author>Winkel EF</author>
            <volume>14</volume>
            <first_page>499</first_page>
            <cYear>1987</cYear>
            <unstructured_citation>
                    Winkel EF, Abbas F, Hart AAM. 
                    Experimental gingivitisin relation to susceptibility to periodontal disease 
                    J Clin Periodontol  
                    1987; 
                    14
                    : 499-507.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR37">
            <journal_title>J Clin Periodontol</journal_title>
            <author>Zitzmann NU</author>
            <volume>28</volume>
            <first_page>517</first_page>
            <cYear>2001</cYear>
            <unstructured_citation>
                    Zitzmann NU, Berglundh T, Marinello CP, Lindhe J. 
                    Experimental peri-implant mucositis in man 
                    J Clin Periodontol  
                    2001; 
                    28
                    : 517-23.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR38">
            <journal_title>J Clin Periodontol</journal_title>
            <author>Berglund T</author>
            <volume>20</volume>
            <first_page>179</first_page>
            <cYear>2000</cYear>
            <unstructured_citation>
                    Berglund T, Lindhe J. 
                    Gingivitis in young and adults dogs 
                    J Clin Periodontol  
                    2000; 
                    20
                    : 179-85.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR39">
            <journal_title>Arch Oral Biol</journal_title>
            <author>Lamster IB</author>
            <volume>30</volume>
            <first_page>235</first_page>
            <cYear>1985</cYear>
            <unstructured_citation>
                    Lamster IB, Hartley LJ, Oshrain RL, Gordon JM. 
                    Evaluation and modification of spectrophotometric procedures for analysis of lactate dehydrogenase, beta-glucuronidase and arylsulphatase in human gingival crevicular fluid collected with filter-paper strips 
                    Arch Oral Biol  
                    1985; 
                    30
                    : 235-42.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR40">
            <journal_title>J Clin Periodontol</journal_title>
            <author>Ebenhard J</author>
            <volume>30</volume>
            <first_page>511</first_page>
            <cYear>2003</cYear>
            <unstructured_citation>
                    Ebenhard J, Ehlers H, Falk W, Acil Y, Albers HK, Jepsen S. 
                    Efficacy of subgingival calculus removal with Er: YAG laser compared to mechanical debridement: an in situ study 
                    J Clin Periodontol  
                    2003; 
                    30
                    (6)
                    : 511-8.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR41">
            <journal_title>Nat Rev Mol Cell Biol</journal_title>
            <author>Heasman SJ</author>
            <volume>9</volume>
            <first_page>690</first_page>
            <cYear>2008</cYear>
            <unstructured_citation>
                    Heasman SJ, Ridley AJ. 
                    Mammalian Rho GTPases: new insights into their functions from in vivo studies 
                    Nat Rev Mol Cell Biol  
                    2008; 
                    9
                    (9)
                    : 690-701.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR42">
            <journal_title>J Clin Periodontol</journal_title>
            <author>Zhang J</author>
            <volume>29</volume>
            <first_page>1082</first_page>
            <cYear>2002</cYear>
            <unstructured_citation>
                    Zhang J, Kashket S, Lingstrom P. 
                    Evidence for the early onset of gingival inflammation following short-term plaque accumulation 
                    J Clin Periodontol  
                    2002; 
                    29
                    : 1082-5.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR43">
            <journal_title>J Periodontal Res</journal_title>
            <author>Ohguchi Y</author>
            <volume>38</volume>
            <first_page>190</first_page>
            <cYear>2003</cYear>
            <unstructured_citation>
                    Ohguchi Y, Ishihara Y, Ohguchi M, et al. 
                    Capsular polysaccharide from actinobacillus actinomytcetemcomitans inhibits IL-6 and IL-8 production in human gingival fibroblasts 
                    J Periodontal Res  
                    2003; 
                    38
                    : 190-7.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR44">
            <journal_title>Clin Exp Immunol</journal_title>
            <author>Stromberg E</author>
            <volume>140</volume>
            <first_page>117</first_page>
            <cYear>2005</cYear>
            <unstructured_citation>
                    Stromberg E, Edebo A, Lundin BS, et al. 
                    Down -regulation of epithelial IL-8 responses in Helicobacter pylori-infected duodenal ulcer patients depends on host factors, rather than bacterial factors 
                    Clin Exp Immunol  
                    2005; 
                    140
                    : 117-25.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR45">
            <journal_title>Lancet</journal_title>
            <author>Marks DJB</author>
            <volume>367</volume>
            <first_page>668</first_page>
            <cYear>2006</cYear>
            <unstructured_citation>
                    Marks DJB, Harbord MWN, MacAllister R, et al. 
                    Defective acute inflammation in chron's disease : a clinical investigation 
                    Lancet  
                    2006; 
                    367
                    : 668-78.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR46">
            <journal_title>J Clin Periodontol</journal_title>
            <author>Shearer B</author>
            <volume>32</volume>
            <first_page>784</first_page>
            <cYear>2005</cYear>
            <unstructured_citation>
                    Shearer B, Hall P, Clarke P, Marshall G, Kinane DF. 
                    Reducing variability and choosing ideal subjects for experimental gingivitis studies 
                    J Clin Periodontol  
                    2005; 
                    32
                    (7)
                    : 784-8.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR47">
            <journal_title>J Periodontol</journal_title>
            <author>Celenligil-Nazliel H</author>
            <volume>71</volume>
            <first_page>1567</first_page>
            <cYear>2000</cYear>
            <unstructured_citation>
                    Celenligil-Nazliel H, Ayhan A, Uzun H, Ruacan S. 
                    The effect of age on proliferating cell nuclear antigen expression in oral gingival epithelium of healthy and inflamed human gingiva 
                    J Periodontol  
                    2000; 
                    71
                    (10)
                    : 1567-74.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR48">
            <journal_title>J Periodontal Res</journal_title>
            <author>Siegel B</author>
            <volume>42</volume>
            <first_page>259</first_page>
            <cYear>2007</cYear>
            <unstructured_citation>
                    Siegel B, Weihe E, Bette M, Nusing RM, Flores-DE-Jocoby L, Mengel R. 
                    The effect of age on prostaglandin-synthesizing enzymes in the development of gingivitis 
                    J Periodontal Res  
                    2007; 
                    42
                    (3)
                    : 259-66.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR49">
            <journal_title>Mol Interv</journal_title>
            <author>Mcgeer EG</author>
            <volume>1</volume>
            <first_page>22</first_page>
            <cYear>2001</cYear>
            <unstructured_citation>
                    Mcgeer EG, Mcgeer PL. 
                    Innate immunity in Alzheimer's disease: a model for local inflammatory reactions 
                    Mol Interv  
                    2001; 
                    1
                    : 22-9.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR50">
            <journal_title>J Clin Periodontol</journal_title>
            <author>Tatakis DN</author>
            <volume>31</volume>
            <first_page>229</first_page>
            <cYear>2004</cYear>
            <unstructured_citation>
                    Tatakis DN, Trombelli L. 
                    Modulation of clinical expression of plaque induced gingivitis.I. Background review and rationale 
                    J Clin Periodontol  
                    2004; 
                    31
                    : 229-38.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR51">
            <journal_title>J Clin Periodontol</journal_title>
            <author>Goodson JM</author>
            <volume>9</volume>
            <first_page>472</first_page>
            <cYear>1982</cYear>
            <unstructured_citation>
                    Goodson JM, Tanner AC, Haffajee AD, Sornberger GC, Soncransky SS. 
                    Patterns of progression and regression of advanced destructine periodontal disease 
                    J Clin Periodontol  
                    1982; 
                    9
                    : 472-81.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR52">
            <journal_title>J Clin Periodontol</journal_title>
            <author>Reuland-Bosma W</author>
            <volume>13</volume>
            <first_page>294</first_page>
            <cYear>1986</cYear>
            <unstructured_citation>
                    Reuland-Bosma W, Van Dijk J, Van Der Weele L. 
                    Experimental gingivitis around deciduous teeth in children with Down's syndrome 
                    J Clin Periodontol  
                    1986; 
                    13
                    : 294-300.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR53">
            <journal_title>J Clin Periodontol</journal_title>
            <author>Preshaw PM</author>
            <volume>25</volume>
            <first_page>774</first_page>
            <cYear>1998</cYear>
            <unstructured_citation>
                    Preshaw PM, Geatch DR, Lauffart B, Jeffcoat MK, Taylor JJ, Heasman PA. 
                    Longitudinal changes in TCRB variable gene expression and markers of gingival inflammation in experimental gingivitis 
                    J Clin Periodontol  
                    1998; 
                    25
                    : 774-80.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR54">
            <journal_title>J Clin Periodontol</journal_title>
            <author>Jepsen S</author>
            <volume>30</volume>
            <first_page>102</first_page>
            <cYear>2003</cYear>
            <unstructured_citation>
                    Jepsen S, Ebenhard J, Fricke D, Hedderich J, Siebert R, Acil Y. 
                    Interleukin -1gene plymorphisms and experimental gingivitis 
                    J Clin Periodontol  
                    2003; 
                    30
                    : 102-6.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR55">
            <journal_title>J Periodontol</journal_title>
            <author>Scapoli C</author>
            <volume>76</volume>
            <first_page>49</first_page>
            <cYear>2005</cYear>
            <unstructured_citation>
                    Scapoli C, Tatakis DN, Mamolini E, Trombelli L. 
                    Modulation of clinical expression of plaque-induced gingivitis: interleukin-1 gene cluster plymorphisms 
                    J Periodontol  
                    2005; 
                    76
                    : 49-56.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR56">
            <journal_title>J Clin Periodontol</journal_title>
            <author>Scapoli C</author>
            <volume>34</volume>
            <first_page>10381</first_page>
            <cYear>2007</cYear>
            <unstructured_citation>
                    Scapoli C, Mamolini E, Trombelli L. 
                    Role of IL-6, TNF-A and LT-A variants in the modulation of the clinical expression of plaque-induced gingivitis 
                    J Clin Periodontol  
                    2007; 
                    34
                    : 10381-8.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR57">
            <journal_title>Periodontology 2000</journal_title>
            <author>Preshaw P</author>
            <volume>48</volume>
            <first_page>92</first_page>
            <cYear>2008</cYear>
            <unstructured_citation>
                    Preshaw P. 
                    Host response modulation in periodontics 
                    Periodontology 2000  
                    2008; 
                    48
                    : 92-110.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR58">
            <journal_title>J Bone Mineral Res</journal_title>
            <author>Hock J</author>
            <volume>16</volume>
            <first_page>975</first_page>
            <cYear>2001</cYear>
            <unstructured_citation>
                    Hock J, Krishnan V, Onyia J, Bidwell J, Milas J, Stanislaus D. 
                    Osteoblast apoptosis and bone turnover 
                    J Bone Mineral Res  
                    2001; 
                    16
                    : 975-84.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR59">
            <journal_title>Oral Health Prev Dent</journal_title>
            <author>Lang NP</author>
            <volume>1</volume>
            <first_page>7</first_page>
            <cYear>2003</cYear>
            <unstructured_citation>
                    Lang NP, Tonnetti MS. 
                    Periodontal risk assessment (PRA) for patients in supportive periodontal therapy 
                    Oral Health Prev Dent  
                    2003; 
                    1
                    : 7-16.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR60">
            <journal_title>Periodontology 2000</journal_title>
            <author>Labriolla A</author>
            <volume>37</volume>
            <first_page>124</first_page>
            <cYear>2005</cYear>
            <unstructured_citation>
                    Labriolla A, Needleman I, Moles D. 
                    Systematic review of the effect of smoking on nonsurgical periodontal therapy 
                    Periodontology 2000  
                    2005; 
                    37
                    : 124-37.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR61">
            <journal_title>J Clin Periodontol</journal_title>
            <author>Ryder MI</author>
            <volume>26</volume>
            <first_page>683</first_page>
            <cYear>1999</cYear>
            <unstructured_citation>
                    Ryder MI, Pons B, Adams D, et al. 
                    Effect of smoking on local delivery of controlled -release doxycycline as compared to scaling and root planning 
                    J Clin Periodontol  
                    1999; 
                    26
                    : 683-91.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR62">
            <journal_title>J Dent Res</journal_title>
            <author>Gonzalez YM</author>
            <volume>75</volume>
            <first_page>796</first_page>
            <cYear>1996</cYear>
            <unstructured_citation>
                    Gonzalez YM, De Nardin A, Grossi SG, Machtei EE, Genco RJ. 
                    Serum nicotine levels, smoking and periodontal attachment loss 
                    J Dent Res  
                    1996; 
                    75
                    : 796-802.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR63">
            <journal_title>J Periodontal Res</journal_title>
            <author>Brecx MC</author>
            <volume>22</volume>
            <first_page>50</first_page>
            <cYear>1987</cYear>
            <unstructured_citation>
                    Brecx MC, Schegel K, Gehr P, Lang NP. 
                    Comparison between histological and clinical parameters during human experimental gingivitis 
                    J Periodontal Res  
                    1987; 
                    22
                    : 50-7.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR64">
            <journal_title> J Periodontol</journal_title>
            <author>Page RC</author>
            <volume>46</volume>
            <first_page>144</first_page>
            <cYear>1975</cYear>
            <unstructured_citation>
                    Page RC, Simpson D, Ammons W. 
                    Host tissue response in chronic inflammatory periodontal disease (IV).the periodontal and dental status of a group of aged great apes 
                     J Periodontol  
                    1975; 
                    46
                    : 144-55.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR65">
            <journal_title>J Clin Periodontol</journal_title>
            <author>Fransson C</author>
            <volume>26</volume>
            <first_page>453</first_page>
            <cYear>1999</cYear>
            <unstructured_citation>
                    Fransson C, Mooney T, Kinane DF, Berglundh T. 
                    Differences in the inflammatory response in young and old human subjects during the course of experimental gingivitis 
                    J Clin Periodontol  
                    1999; 
                    26
                    : 453-60.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR66">
            <journal_title>J Clin Periodontol</journal_title>
            <author>Chung RM</author>
            <volume>24</volume>
            <first_page>146</first_page>
            <cYear>1997</cYear>
            <unstructured_citation>
                    Chung RM, Grbic JT, Lamster IB. 
                    Interleukin 8 and b glucuronidase in gingival crevicular fluid 
                    J Clin Periodontol  
                    1997; 
                    24
                    : 146-52.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR67">
            <journal_title>J Clin Dent</journal_title>
            <author>Jin L</author>
            <volume>11</volume>
            <first_page>35</first_page>
            <cYear>2000</cYear>
            <unstructured_citation>
                    Jin L, Wong KY, Leung WK, Corbet EF. 
                    Comparison of treatment response patterns following scaling and root planing in smokers and non-smokers with untreated adult periodontitis 
                    J Clin Dent  
                    2000; 
                    11
                    (2)
                    : 35-41.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR68">
            <journal_title>J Periodontol</journal_title>
            <author>Ozmeric N</author>
            <volume>69</volume>
            <first_page>1299</first_page>
            <cYear>1998</cYear>
            <unstructured_citation>
                    Ozmeric N, Bal B, Balos K, Berker E, Bulut S. 
                    The correlation of gingival crevicular fluid interleukin-8 levels and periodontal status in localized juvenile periodontitis 
                    J Periodontol  
                    1998; 
                    69
                    : 1299-304.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR69">
            <journal_title>J Periodontol</journal_title>
            <author>Tsai CC</author>
            <volume>66</volume>
            <first_page>852</first_page>
            <cYear>1995</cYear>
            <unstructured_citation>
                    Tsai CC, Ho YP, Chen CC. 
                    Levels of interleukin-1b and interleukin-8 in gingival crevicular fluids in adult periodontitis 
                    J Periodontol  
                    1995; 
                    66
                    : 852-9.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR70">
            <journal_title>J Periodontal Res</journal_title>
            <author>Gemmell E</author>
            <volume>28</volume>
            <first_page>122</first_page>
            <cYear>1993</cYear>
            <unstructured_citation>
                    Gemmell E, Seymour GJ. 
                    Interleukin1, interleukin 6 and transforming growth factor-b production by human gingival mononuclear cells following stimulation with porphyromonas gingivalis and fusobacterium nucleatum 
                    J Periodontal Res  
                    1993; 
                    28
                    : 122-9.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR71">
            <journal_title>Acta Odontol Scand</journal_title>
            <author>Seymour GJ</author>
            <volume>59</volume>
            <first_page>167</first_page>
            <cYear>2001</cYear>
            <unstructured_citation>
                    Seymour GJ, Gemmel E. 
                    Cytokines and periodontal disease: where to from here? 
                    Acta Odontol Scand  
                    2001; 
                    59
                    : 167-73.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR72">
            <journal_title>J Periodontol</journal_title>
            <author>Takigawa M</author>
            <volume>65</volume>
            <first_page>1122</first_page>
            <cYear>1994</cYear>
            <unstructured_citation>
                    Takigawa M, Takashiba S, Takahashi K, Arai H, Kurihara H, Murayama Y. 
                    Prostaglandin E2 inhibits interleukin- 6 release but not its transcription inhuman gingival fibroblasts stimulated with interleukin 1-b or tumor necrosis factor-a 
                    J Periodontol  
                    1994; 
                    65
                    : 1122-7.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR73">
            <journal_title>Crit Rev Oral Biol Med</journal_title>
            <author>Okada H</author>
            <volume>9</volume>
            <first_page>248</first_page>
            <cYear>1998</cYear>
            <unstructured_citation>
                    Okada H, Murakami S. 
                    Cytokine expression in periodontal health and disease 
                    Crit Rev Oral Biol Med  
                    1998; 
                    9
                    : 248-66.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR74">
            <journal_title>Blood</journal_title>
            <author>Kishimoto T</author>
            <volume>74</volume>
            <first_page>1</first_page>
            <cYear>1989</cYear>
            <unstructured_citation>
                    Kishimoto T. 
                    The biology of interleukin- 6 
                    Blood  
                    1989; 
                    74
                    : 1-10.
                    
                </unstructured_citation>
          </citation>
        </citation_list>
      </journal_article>
    </journal>
  </body>
</doi_batch>
