TODENTJ-25-03-2019_TODENTJ-11-99 1553506983 Bentham Open doi@benthamopen.net Bentham Open The Open Dentistry Journal TODENTJ 1874-2106 02 14 2017 11 1 Behrang Baniasadi Laurence Evrard Objectives: The purpose of this study was to evaluate vertical alveolar bone loss 3 months after tooth extraction when a technique of ridge preservation was applied using a particulate demineralized freeze-dried bone allograft 300 - 500 µm associated with platelet concentrates (platelet-rich-fibrin) in the form of gel and membranes. Material and Methods: A retrospective radiological clinical study was conducted on 56 patients for whom 95 extractions had been performed immediately followed by alveolar filling. Among the patients, 17 were smokers and 16 were provided with an immediate removable temporary prosthesis after extractions. Vertical bone loss was measured radiologically by panoramic X-ray before extractions and by a computed tomography scan 3 months after, at the level of mid-buccal bone wall, by two independent observers. For statistical analysis, Student’s t-test was performed to compare the mean bone loss between mono- and pluri-radicular teeth and to compare the mean bone loss between tobacco users versus non users and finally to compare the mean bone loss between individuals that had provisional removable prosthesis and those that had not. Results: Three months after tooth extraction, the mean of vertical loss of the mid-buccal bone wall was 0.72 (SD 0.71) mm (5.53% SD 5.19). No significant difference between bone loss at mono-radicular and pluri-radicular teeth (P = 0.982) was observed. There was no significant correlation between tobacco habits and bone loss (P = 0.2), nor between provisional removable prosthesis and bone loss (P = 0.786). Conclusion: These results indicate a good potential for the technique using Demineralized Freeze-Dried Bone Allograft 300 - 500 µm and platelet concentrates in alveolar bone preservation. 02 14 2017 99 108 TODENTJ-11-99 1 10.2174/crossmark_policy opendentistryjournal.com benthamopen.com true Peer Reviewed Single blind Checked with iThenticate 2016-11-12 2017-01-06 2017-01-11 2017-02-14 https://creativecommons.org/licenses/by/4.0/legalcode 10.2174/1874210601711010099 1553506983 https://opendentistryjournal.com/VOLUME/11/PAGE/99/ https://opendentistryjournal.com/contents/volumes/V11/TODENTJ-11-99/TODENTJ-11-99.pdf https://opendentistryjournal.com/contents/volumes/V11/TODENTJ-11-99/TODENTJ-11-99.pdf https://opendentistryjournal.com/contents/volumes/V11/TODENTJ-11-99/TODENTJ-11-99.pdf https://opendentistryjournal.com/contents/volumes/V11/TODENTJ-11-99/TODENTJ-11-99.pdf https://opendentistryjournal.com/contents/volumes/V11/TODENTJ-11-99/TODENTJ-11-99.pdf https://opendentistryjournal.com/contents/volumes/V11/TODENTJ-11-99/TODENTJ-11-99.pdf https://opendentistryjournal.com/contents/volumes/V11/TODENTJ-11-99/TODENTJ-11-99.pdf https://opendentistryjournal.com/contents/volumes/V11/TODENTJ-11-99/TODENTJ-11-99.xml Clin. 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