{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,23]],"date-time":"2026-08-23T18:08:09Z","timestamp":1787508489752,"version":"build-2736575974"},"reference-count":38,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2025,1,27]],"date-time":"2025-01-27T00:00:00Z","timestamp":1737936000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Dentistry Journal"],"abstract":"<jats:p>Background: Tooth loss causes alveolar bone resorption, which may hinder the ability of implant placement. Socket preservation with immediate implant placement is one of the methods used to reduce bone resorption. In this retrospective study, we evaluated the influence of the use of dense polytetrafluoroethylene (d-PTFE) membranes on alveolar preservation after tooth extraction and with the installation of immediate dental implants. Methods: In this retrospective study, one hundred and four patients were divided into two groups: immediate implant and gap filling with heterogenous bone graft (control group, 52 patients) or immediate implant, gap filling with heterogenous bone graft, and covering with a d-PTFE membrane with dimensions of 12 \u00d7 24 mm, which was intentionally left exposed to the oral cavity (test group, 52 patients). Tomographic data were obtained before and 12 months after the surgical procedures. Results: The membranes exposed in the oral cavity showed no infection. Volumetric analyses revealed a statistically significant difference in alveolar ridge resorption for the control and d-PTFE groups, 16.75% and 4.55%, respectively. Conclusions: Intentionally exposed d-PTFE membranes showed minimal complications. Based on the volumetric results, alveolar ridge preservation with d-PTFE membranes was superior to the bone graft alone in immediate implant placement.<\/jats:p>","DOI":"10.3390\/dj13020058","type":"journal-article","created":{"date-parts":[[2025,1,27]],"date-time":"2025-01-27T11:38:49Z","timestamp":1737977929000},"page":"58","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Volumetric Evaluation of Alveolar Ridge Preservation Using Dense PTFE (d-PTFE) Membranes Intentionally Exposed to the Oral Cavity After Immediate Implant Placement\u2014A Retrospective Study"],"prefix":"10.3390","volume":"13","author":[{"given":"Ulisses R. C.","family":"Dayube","sequence":"first","affiliation":[{"name":"Department of Periodontology, Dental Research Division, Guarulhos University, Guarulhos 07023-070, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1875-7402","authenticated-orcid":false,"given":"Thabet","family":"Asbi","sequence":"additional","affiliation":[{"name":"Department of Periodontology, Dental Research Division, Guarulhos University, Guarulhos 07023-070, Brazil"},{"name":"Department of Periodontology and Implant Dentistry, Rambam Health Care Campus, Haifa 3525408, Israel"},{"name":"Maccabi-Dent Research Department, Tel-Aviv 6801298, Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4093-2203","authenticated-orcid":false,"given":"Marcio","family":"Formiga","sequence":"additional","affiliation":[{"name":"Department of Periodontology, Dental Research Division, Guarulhos University, Guarulhos 07023-070, Brazil"},{"name":"Department of Periodontology and Oral Implantology, University of Vale do Itaja\u00ed, S\u00e3o Jos\u00e9 88302-901, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eduardo","family":"Groisman","sequence":"additional","affiliation":[{"name":"Department of Periodontology, Dental Research Division, Guarulhos University, Guarulhos 07023-070, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jo\u00e3o Paulo","family":"Bortoli","sequence":"additional","affiliation":[{"name":"Department of Periodontology, Dental Research Division, Guarulhos University, Guarulhos 07023-070, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fernando G.","family":"Lima","sequence":"additional","affiliation":[{"name":"Department of Periodontology, Dental Research Division, Guarulhos University, Guarulhos 07023-070, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5500-7961","authenticated-orcid":false,"given":"Yaniv","family":"Mayer","sequence":"additional","affiliation":[{"name":"Department of Periodontology and Implant Dentistry, Rambam Health Care Campus, Haifa 3525408, Israel"},{"name":"Rappaport Faculty of Medicine, Technion institute of technology, Haifa 3200003, Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Doron","family":"Haim","sequence":"additional","affiliation":[{"name":"Maccabi-Dent Research Department, Tel-Aviv 6801298, Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Isabelle","family":"Meinster","sequence":"additional","affiliation":[{"name":"Maccabi-Dent Research Department, Tel-Aviv 6801298, Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0429-2883","authenticated-orcid":false,"given":"Eran","family":"Gabay","sequence":"additional","affiliation":[{"name":"Department of Periodontology and Implant Dentistry, Rambam Health Care Campus, Haifa 3525408, Israel"},{"name":"Rappaport Faculty of Medicine, Technion institute of technology, Haifa 3200003, Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1971-0195","authenticated-orcid":false,"given":"Jamil","family":"A. Shibli","sequence":"additional","affiliation":[{"name":"Department of Periodontology, Dental Research Division, Guarulhos University, Guarulhos 07023-070, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,1,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"212","DOI":"10.1111\/j.1600-051X.2005.00642.x","article-title":"Dimensional Ridge Alterations Following Tooth Extraction. An Experimental Study in the Dog","volume":"32","author":"Lindhe","year":"2005","journal-title":"J. Clin. Periodontol."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1163","DOI":"10.1111\/cid.12415","article-title":"Ridge Preservation Using Composite Alloplastic Materials: A Randomized Control Clinical and Histological Study in Humans","volume":"18","author":"Mayer","year":"2016","journal-title":"Clin. Implant Dent. Relat. 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