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        <full_title>The Open Dentistry Journal</full_title>
        <abbrev_title>TODENTJ</abbrev_title>
        <issn media_type="print">1874-2106</issn>
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          <month>12</month>
          <day>23</day>
          <year>2015</year>
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          <volume>9</volume>
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        <issue>1</issue>
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        <titles>
          <title>Failure Rate of Direct High-Viscosity Glass-Ionomer Versus Hybrid Resin Composite Restorations in Posterior Permanent Teeth - a Systematic Review</title>
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        <contributors>
          <person_name contributor_role="author" sequence="first">
            <given_name>Steffen</given_name>
            <surname>Mickenautsch</surname>
          </person_name>
          <person_name contributor_role="author" sequence="additional">
            <given_name>Veerasamy</given_name>
            <surname>Yengopal</surname>
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        <jats:abstract>
                <jats:sec>
                    <jats:title>Purpose</jats:title>
                    <jats:p>Traditionally, resin composite restorations are claimed by reviews of the dental literature as being superior to glass-ionomer fillings in terms of restoration failures in posterior permanent teeth. The aim of this systematic review is to answer the clinical question, whether conventional high-viscosity glass-ionomer restorations, in patients with single and/or multi-surface cavities in posterior permanent teeth, have indeed a higher failure rate than direct hybrid resin composite restorations.</jats:p>
                </jats:sec>
                <jats:sec>
                    <jats:title>Methods</jats:title>
                    <jats:p>Eight databases were searched until December 02, 2013. Trials were assessed for bias risks, in-between datasets heterogeneity and statistical sample size power. Effects sizes were computed and statistically compared. A total of 55 citations were identified through systematic literature search. From these, 46 were excluded. No trials related to high-viscosity glass-ionomers <jats:italic>versus</jats:italic> resin composite restorations for direct head-to-head comparison were found. Three trials related to high-viscosity glass-ionomers <jats:italic>versus</jats:italic> amalgam and three trials related to resin composite <jats:italic>versus</jats:italic> amalgam restorations could be included for adjusted indirect comparison, only.</jats:p>
                </jats:sec>
                <jats:sec>
                    <jats:title>Results</jats:title>
                    <jats:p>The available evidence suggests no difference in the failure rates between both types of restoration beyond the play of chance, is limited by lack of head-to-head comparisons and an insufficient number of trials, as well as by high bias and in-between-dataset heterogeneity risk.  The current clinical evidence needs to be regarded as too poor in order to justify superiority claims regarding the failure rates of both restoration types. Sufficiently large-sized, parallel-group, randomised control trials with high internal validity are needed, in order to justify any clinically meaningful judgment to this topic.</jats:p>
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        <citation_list>
          <citation key="refR1">
            <journal_title>J. Dent. Res</journal_title>
            <author>Rekow E.D.</author>
            <volume>92</volume>
            <first_page>945</first_page>
            <cYear>2013</cYear>
            <doi>10.1177/0022034513507058</doi>
            <unstructured_citation>
                    Rekow ED, Fox CH, Petersen PE, Watson T. 
                    Innovations in materials for direct restorations: why do we need innovations? Why is it so hard to capitalize on them? 
                    J Dent Res  
                    2013; 
                    92
                    (11)
                    : 945-7.
                    
                    
                    
                </unstructured_citation>
          </citation>
          <citation key="refR2">
            <journal_title>J. Am. Dent. Assoc</journal_title>
            <author>Bernardo M.</author>
            <volume>138</volume>
            <first_page>775</first_page>
            <cYear>2007</cYear>
            <doi>10.14219/jada.archive.2007.0265</doi>
            <unstructured_citation>
                    Bernardo M, Luis H, Martin MD, et al. 
                    Survival and reasons for failure of amalgam versus composite posterior restorations placed in a randomized clinical trial 
                    J Am Dent Assoc  
                    2007; 
                    138
                    (6)
                    : 775-83.
                    
                    
                    
                </unstructured_citation>
          </citation>
          <citation key="refR3">
            <journal_title>GMS Health Tech. Assess</journal_title>
            <author>Antony K</author>
            <cYear>2008; 4: Doc12</cYear>
            <unstructured_citation>
                    Antony K, Hiebinger C, Genser D, et al. 
                    Haltbarkeit von Zahnamalgam im Vergleich zu Kompositkunststoffen (Article in German) 
                    GMS Health Tech Assess 
                    2008; 4: Doc12.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR4">
            <journal_title>Br. Dent. J</journal_title>
            <author>Downer M.C.</author>
            <volume>187</volume>
            <first_page>432</first_page>
            <cYear>1999</cYear>
            <doi>10.1038/sj.bdj.4800298a1</doi>
            <unstructured_citation>
                    Downer MC, Azli NA, Bedi R, Moles DR, Setchell DJ. 
                    How long do routine dental restorations last? A systematic review 
                    Br Dent J  
                    1999; 
                    187
                    (8)
                    : 432-9.
                    
                    
                    
                </unstructured_citation>
          </citation>
          <citation key="refR5">
            <journal_title>Am. J. Dent</journal_title>
            <author>Hickel R.</author>
            <volume>13</volume>
            <first_page>41D</first_page>
            <cYear>2000</cYear>
            <unstructured_citation>
                    Hickel R, Manhart J, García-Godoy F. 
                    Clinical results and new developments of direct posterior restorations 
                    Am J Dent  
                    2000; 
                    13
                    (Spec No)
                    : 41D-54D.
                    
                    
                </unstructured_citation>
          </citation>
          <citation key="refR6">
            <journal_title>J. Adhes. Dent</journal_title>
            <author>Hickel R.</author>
            <volume>3</volume>
            <first_page>45</first_page>
            <cYear>2001</cYear>
            <unstructured_citation>
                    Hickel R, Manhart J. 
                    Longevity of restorations in posterior teeth and reasons for failure 
                    J Adhes Dent  
                    2001; 
                    3
                    (1)
                    : 45-64.
                    
                    
                </unstructured_citation>
          </citation>
          <citation key="refR7">
            <journal_title>Oper. Dent</journal_title>
            <author>Manhart J.</author>
            <volume>29</volume>
            <first_page>481</first_page>
            <cYear>2004</cYear>
            <unstructured_citation>
                    Manhart J, Chen H, Hamm G, Hickel R. 
                    Buonocore Memorial Lecture. Review of the clinical survival of direct and indirect restorations in posterior teeth of the permanent dentition 
                    Oper Dent  
                    2004; 
                    29
                    (5)
                    : 481-508.
                    
                    
                </unstructured_citation>
          </citation>
          <citation key="refR8">
            <journal_title>J. Dent. Res</journal_title>
            <author>Frencken J.E.</author>
            <volume>83</volume>
            <first_page>120</first_page>
            <cYear>2004</cYear>
            <doi>10.1177/154405910408300207</doi>
            <unstructured_citation>
                    Frencken JE, Van ’t Hof MA, Van Amerongen WE, Holmgren CJ. 
                    Effectiveness of single-surface ART restorations in the permanent dentition: a meta-analysis 
                    J Dent Res  
                    2004; 
                    83
                    (2)
                    : 120-3.
                    
                    
                    
                </unstructured_citation>
          </citation>
          <citation key="refR9">
            <journal_title>J Minim Interv Dent</journal_title>
            <author>Wang X.</author>
            <volume>5</volume>
            <first_page>377</first_page>
            <cYear>2012</cYear>
            <unstructured_citation>
                    Wang X, Nie J, Cai X, et al. 
                    Failure rate of atraumatic restorative treatment using high-viscosity glass-ionomer cement compared to conventional amalgam restorative treatment in primary and permanent teeth: a systematic review of Chinese trials 
                    J Minim Interv Dent  
                    2012; 
                    5
                    : 377-415.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR10">
            <journal_title>SADJ</journal_title>
            <author>Mickenautsch S.</author>
            <volume>67</volume>
            <first_page>329</first_page>
            <cYear>2012</cYear>
            <unstructured_citation>
                    Mickenautsch S, Yengopal V. 
                    Failure rate of high-viscosity GIC based ART compared with that of conventional amalgam restorations--evidence from an update of a systematic review 
                    SADJ  
                    2012; 
                    67
                    (7)
                    : 329-31.
                    
                    
                </unstructured_citation>
          </citation>
          <citation key="refR11">
            <journal_title>J Minimum Interv Dent</journal_title>
            <author>Mickenautsch S.</author>
            <volume>6</volume>
            <first_page>62</first_page>
            <cYear>2013</cYear>
            <unstructured_citation>
                    Mickenautsch S, Yengopal V. 
                    Failure rate of direct tooth restorations placed with conventional glass-ionomers compared to composite resin restorations in posterior permanent teeth: a systematic review and network meta-analysis [protocol] 
                    J Minimum Interv Dent  
                    2013; 
                    6
                    : 62-72.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR12">
            <doi>10.1002/0470863641</doi>
            <unstructured_citation>
                    Berger VW. 
                    Selection bias and covariate imbalances in randomised clinical trials. 
                    Chichester, UK: John Wiley &amp; Sons, Ltd 2005.
                    
                    
                    
                </unstructured_citation>
          </citation>
          <citation key="refR13">
            <journal_title>Community Dent. Oral Epidemiol</journal_title>
            <author>Taifour D.</author>
            <volume>31</volume>
            <first_page>122</first_page>
            <cYear>2003</cYear>
            <doi>10.1034/j.1600-0528.2003.00027.x</doi>
            <unstructured_citation>
                    Taifour D, Frencken JE, Beiruti N, van’t Hof MA, Truin GJ, van Palenstein Helderman WH. 
                    Comparison between restorations in the permanent dentition produced by hand and rotary instrumentation--survival after 3 years 
                    Community Dent Oral Epidemiol  
                    2003; 
                    31
                    (2)
                    : 122-8.
                    
                    
                    
                </unstructured_citation>
          </citation>
          <citation key="refR14">
            <unstructured_citation>
                    Higgins JPT, Green S. 
                    Cochrane Handbook for Systematic Reviews of Interventions Version 5.1.0 [updated March 2011]: Section 9.5.2. 
                    The Cochrane Collaboration 2011 
                    
                 Available from: www.cochrane-handbook.org, [Accessed: 10th Nov 2013].</unstructured_citation>
          </citation>
          <citation key="refR15">
            <journal_title>BMJ</journal_title>
            <author>Ioannidis J.P.</author>
            <volume>335</volume>
            <first_page>914</first_page>
            <cYear>2007</cYear>
            <doi>10.1136/bmj.39343.408449.80</doi>
            <unstructured_citation>
                    Ioannidis JP, Patsopoulos NA, Evangelou E. 
                    Uncertainty in heterogeneity estimates in meta-analyses 
                    BMJ  
                    2007; 
                    335
                    (7626)
                    : 914-6.
                    
                    
                    
                </unstructured_citation>
          </citation>
          <citation key="refR16">
            <journal_title>Health Technol. Assess</journal_title>
            <author>Glenny A.M.</author>
            <volume>9</volume>
            <first_page>1</first_page>
            <cYear>2005</cYear>
            <doi>10.3310/hta9260</doi>
            <unstructured_citation>
                    Glenny AM, Altman DG, Song F, et al. 
                    International Stroke Trial Collaborative Group. 
                    Indirect comparisons of competing interventions 
                    Health Technol Assess  
                    2005; 
                    9
                    (26)
                    : 1.
                    
                    
                </unstructured_citation>
          </citation>
          <citation key="refR17">
            <journal_title>Clin. Oral Investig</journal_title>
            <author>Diem V.T.</author>
            <volume>18</volume>
            <first_page>753</first_page>
            <cYear>2014</cYear>
            <doi>10.1007/s00784-013-1026-z</doi>
            <unstructured_citation>
                    Diem VT, Tyas MJ, Ngo HC, Phuong LH, Khanh ND. 
                    The effect of a nano-filled resin coating on the 3-year clinical performance of a conventional high-viscosity glass-ionomer cement 
                    Clin Oral Investig  
                    2014; 
                    18
                    (3)
                    : 753-9.
                    
                    
                    
                </unstructured_citation>
          </citation>
          <citation key="refR18">
            <unstructured_citation>
                    Song F. 
                    What is indirect comparison? In: 
                    UK: Hayward  Medical Communications 2009.
                    
                    
                    
                 Available from: http://www.whatis series.co.uk/whatis/pdfs/What_is_ind_comp.pdf, [Accessed: 10th Nov 2013].</unstructured_citation>
          </citation>
          <citation key="refR19">
            <journal_title>Value Health</journal_title>
            <author>Jansen J.P.</author>
            <volume>14</volume>
            <first_page>417</first_page>
            <cYear>2011</cYear>
            <doi>10.1016/j.jval.2011.04.002</doi>
            <unstructured_citation>
                    Jansen JP, Fleurence R, Devine B, et al. 
                    Interpreting indirect treatment comparisons and network meta-analysis for health-care decision making: report of the ISPOR Task Force on Indirect Treatment Comparisons Good Research Practices: part 1 
                    Value Health  
                    2011; 
                    14
                    (4)
                    : 417-28.
                    
                    
                    
                </unstructured_citation>
          </citation>
          <citation key="refR20">
            <journal_title>Value Health</journal_title>
            <author>Hoaglin D.C.</author>
            <volume>14</volume>
            <first_page>429</first_page>
            <cYear>2011</cYear>
            <doi>10.1016/j.jval.2011.01.011</doi>
            <unstructured_citation>
                    Hoaglin DC, Hawkins N, Jansen JP, et al. 
                    Conducting indirect-treatment-comparison and network-meta-analysis studies: report of the ISPOR Task Force on Indirect Treatment Comparisons Good Research Practices: part 2 
                    Value Health  
                    2011; 
                    14
                    (4)
                    : 429-37.
                    
                    
                    
                </unstructured_citation>
          </citation>
          <citation key="refR21">
            <journal_title>J. Clin. Epidemiol</journal_title>
            <author>Bucher H.C.</author>
            <volume>50</volume>
            <first_page>683</first_page>
            <cYear>1997</cYear>
            <doi>10.1016/S0895-4356(97)00049-8</doi>
            <unstructured_citation>
                    Bucher HC, Guyatt GH, Griffith LE, Walter SD. 
                    The results of direct and indirect treatment comparisons in meta-analysis of randomized controlled trials 
                    J Clin Epidemiol  
                    1997; 
                    50
                    (6)
                    : 683-91.
                    
                    
                    
                </unstructured_citation>
          </citation>
          <citation key="refR22">
            <journal_title>Med. Care</journal_title>
            <author>Vandermeer B.W.</author>
            <volume>45</volume>
            <first_page>S166</first_page>
            <cYear>2007</cYear>
            <doi>10.1097/MLR.0b013e3180546867</doi>
            <unstructured_citation>
                    Vandermeer BW, Buscemi N, Liang Y, Witmans M. 
                    Comparison of meta-analytic results of indirect, direct, and combined comparisons of drugs for chronic insomnia in adults: a case study 
                    Med Care  
                    2007; 
                    45
                    (10)
                    (Suppl. 2)
                    : S166-72.
                    
                    
                    
                </unstructured_citation>
          </citation>
          <citation key="refR23">
            <unstructured_citation>
                    Wells GA, Sultan SA, Chen L, et al. 
                    Indirect treatment comparison [computer program]. Version 1.0. Ottawa: Canadian Agency for Drugs and Technologies in Health 
                    2009.
                </unstructured_citation>
          </citation>
          <citation key="refR24">
            <journal_title>Schwe Monats Zahnh</journal_title>
            <author>Roulet J.F.</author>
            <volume>90</volume>
            <first_page>18</first_page>
            <cYear>1980</cYear>
            <unstructured_citation>
                    Roulet JF, Mettler P, Friedrich U. 
                    A clinical comparison of three composites with amalgam for class II fillings under special consideration of the curettage. Results after 2 years 
                    Schwe Monats Zahnh  
                    1980; 
                    90
                    : 18-30.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR25">
            <journal_title>Zahn Mund Kieferheilkd. Zentralbl</journal_title>
            <author>Hoyer I.</author>
            <volume>76</volume>
            <first_page>721</first_page>
            <cYear>1988</cYear>
            <unstructured_citation>
                    Hoyer I, Gängler P, Niemela S. 
                    Composite and amalgam fillings in a 4-year clinical comparison 
                    Zahn Mund Kieferheilkd Zentralbl  
                    1988; 
                    76
                    (7)
                    : 721-6.
                    
                    
                </unstructured_citation>
          </citation>
          <citation key="refR26">
            <journal_title>J. Pak. Dent. Assoc</journal_title>
            <author>Banday N.</author>
            <volume>11</volume>
            <first_page>137</first_page>
            <cYear>2002</cYear>
            <unstructured_citation>
                    Banday N, Dogon L, Saeed F. 
                    A clinical trial using glass ionomers amalgams and composites (part II) 
                    J Pak Dent Assoc  
                    2002; 
                    11
                    : 137-41.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR27">
            <journal_title>Clin. Med</journal_title>
            <author>Li H-M.</author>
            <volume>6</volume>
            <first_page>105</first_page>
            <cYear>2005</cYear>
            <unstructured_citation>
                    Li H-M, Dou Z-H. 
                    Clinical observation of using different material in the elderly decaying tooth ART technique (Article in Chinese). Pract 
                    Clin Med  
                    2005; 
                    6
                    : 105-7.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR28">
            <journal_title>J. Dent. Res</journal_title>
            <author>Frencken J.E.</author>
            <volume>85</volume>
            <first_page>622</first_page>
            <cYear>2006</cYear>
            <doi>10.1177/154405910608500708</doi>
            <unstructured_citation>
                    Frencken JE, Taifour D, van ’t Hof MA. 
                    Survival of ART and amalgam restorations in permanent teeth of children after 6.3 years 
                    J Dent Res  
                    2006; 
                    85
                    (7)
                    : 622-6.
                    
                    
                    
                </unstructured_citation>
          </citation>
          <citation key="refR29">
            <unstructured_citation>
                    Estupiñán-Day S, Milner T, Tellez M. 
                    Oral health of low income children: procedures for atraumatic restorative treatment (PRAT) - Final report. PAHO Project number 091024: ATN/JF-7025-RG 
                    2006.
                </unstructured_citation>
          </citation>
          <citation key="refR30">
            <journal_title>J. Am. Dent. Assoc</journal_title>
            <author>Soncini J.A.</author>
            <volume>138</volume>
            <first_page>763</first_page>
            <cYear>2007</cYear>
            <doi>10.14219/jada.archive.2007.0264</doi>
            <unstructured_citation>
                    Soncini JA, Maserejian NN, Trachtenberg F, Tavares M, Hayes C. 
                    The longevity of amalgam versus compomer/composite restorations in posterior primary and permanent teeth: findings From the New England Children’s Amalgam Trial 
                    J Am Dent Assoc  
                    2007; 
                    138
                    (6)
                    : 763-72.
                    
                    
                    
                </unstructured_citation>
          </citation>
          <citation key="refR31">
            <journal_title>Eur. J. Prosthodont. Restor. Dent</journal_title>
            <author>Sachdeo A.</author>
            <volume>12</volume>
            <first_page>15</first_page>
            <cYear>2004</cYear>
            <unstructured_citation>
                    Sachdeo A, Gray GB, Sulieman MA, Jagger DC. 
                    Comparison of wear and clinical performance between amalgam, composite and open sandwich restorations: 2-year results 
                    Eur J Prosthodont Restor Dent  
                    2004; 
                    12
                    (1)
                    : 15-20.
                    
                    
                </unstructured_citation>
          </citation>
          <citation key="refR32">
            <journal_title>J Minimum Interv Dent</journal_title>
            <author>Gurgan S.</author>
            <volume>6</volume>
            <first_page>81</first_page>
            <cYear>2013</cYear>
            <unstructured_citation>
                    Gurgan S, Firat E, Kutuk ZB. 
                    Two-year study on the clinical performance of the glass ionomer based restorative system EQUIA 
                    J Minimum Interv Dent  
                    2013; 
                    6
                    : 81-6.
                    
                </unstructured_citation>
          </citation>
          <citation key="refR33">
            <journal_title>Int. J. Epidemiol</journal_title>
            <author>Jüni P.</author>
            <volume>31</volume>
            <first_page>115</first_page>
            <cYear>2002</cYear>
            <doi>10.1093/ije/31.1.115</doi>
            <unstructured_citation>
                    Jüni P, Holenstein F, Sterne J, Bartlett C, Egger M. 
                    Direction and impact of language bias in meta-analyses of controlled trials: empirical study 
                    Int J Epidemiol  
                    2002; 
                    31
                    (1)
                    : 115-23.
                    
                    
                    
                </unstructured_citation>
          </citation>
          <citation key="refR34">
            <journal_title>J. Clin. Epidemiol</journal_title>
            <author>Moher D.</author>
            <volume>53</volume>
            <first_page>964</first_page>
            <cYear>2000</cYear>
            <doi>10.1016/S0895-4356(00)00188-8</doi>
            <unstructured_citation>
                    Moher D, Pham B, Klassen TP, et al. 
                    What contributions do languages other than English make on the results of meta-analyses? 
                    J Clin Epidemiol  
                    2000; 
                    53
                    (9)
                    : 964-72.
                    
                    
                    
                </unstructured_citation>
          </citation>
          <citation key="refR35">
            <journal_title>J. Clin. Epidemiol</journal_title>
            <author>Song F.</author>
            <volume>61</volume>
            <first_page>455</first_page>
            <cYear>2008</cYear>
            <doi>10.1016/j.jclinepi.2007.06.006</doi>
            <unstructured_citation>
                    Song F, Harvey I, Lilford R. 
                    Adjusted indirect comparison may be less biased than direct comparison for evaluating new pharmaceutical interventions 
                    J Clin Epidemiol  
                    2008; 
                    61
                    (5)
                    : 455-63.
                    
                    
                    
                </unstructured_citation>
          </citation>
        </citation_list>
      </journal_article>
    </journal>
  </body>
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