{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,20]],"date-time":"2026-03-20T03:11:26Z","timestamp":1773976286003,"version":"3.50.1"},"reference-count":42,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2021,11,25]],"date-time":"2021-11-25T00:00:00Z","timestamp":1637798400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JFB"],"abstract":"<jats:p>The ideal positioning of immediate implants in molar extraction sockets often requires the osteotomy to be in the interradicular septum, which can be challenging in some cases, with traditional site preparation techniques. Patients who had undergone molar tooth extraction and immediate implant placement at five different centers, and followed up between August 2015 and September 2020, were evaluated. Inclusion criteria were use of the osseodensification technique for implant site preparation. The primary outcome was septum width measurement pre-instrumentation and osteotomy diameter post expansion. Clinical outcomes, such as implant insertion torque (ISQ) and implant survival rate, were also collected. A total of 131 patients, who received 145 immediate implants, were included. The mean overall septum width at baseline was 3.3 mm and the mean osteotomy diameter post instrumentation was 4.65 mm. A total of ten implants failed: seven within the healing period and three after loading; resulting in a cumulative implant survival rate of 93.1%. This retrospective study showed that osseodensification is a predictable method for immediate implant placement with interradicular septum expansion in molar extraction sockets. Furthermore, it allowed the introduction of a new molar socket classification. In the future, well-designed controlled clinical studies are needed to confirm these results and further explore the potential advantages of this technique.<\/jats:p>","DOI":"10.3390\/jfb12040066","type":"journal-article","created":{"date-parts":[[2021,12,1]],"date-time":"2021-12-01T05:02:36Z","timestamp":1638334956000},"page":"66","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":19,"title":["Molar Septum Expansion with Osseodensification for Immediate Implant Placement, Retrospective Multicenter Study with Up-to-5-Year Follow-Up, Introducing a New Molar Socket Classification"],"prefix":"10.3390","volume":"12","author":[{"given":"Samvel","family":"Bleyan","sequence":"first","affiliation":[{"name":"Private Practice, 3\/1 Tatarskaya St., 115184 Moscow, Russia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2758-2667","authenticated-orcid":false,"given":"Jo\u00e3o","family":"Gaspar","sequence":"additional","affiliation":[{"name":"Clinical Research Unit (CRU), Centro de Investiga\u00e7\u00e3o Interdisciplinar Egas Moniz (CiiEM), Egas Moniz Cooperativa de Ensino Superior, 2829-511 Almada, Portugal"}]},{"given":"Salah","family":"Huwais","sequence":"additional","affiliation":[{"name":"Department of Periodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA"}]},{"given":"Charles","family":"Schwimer","sequence":"additional","affiliation":[{"name":"Department of Periodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA"},{"name":"Department of Periodontics, School of Dental Medicine, University of Pittsburgh, Pittsburgh, PA 15260, USA"}]},{"given":"Ziv","family":"Mazor","sequence":"additional","affiliation":[{"name":"Private Practice, 144 Begin St., Tel Aviv 6492102, Israel"},{"name":"Department of Periodontics, Titu Maiorescu University, 040441 Bucharest, Romania"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0167-4077","authenticated-orcid":false,"given":"Jos\u00e9 Jo\u00e3o","family":"Mendes","sequence":"additional","affiliation":[{"name":"Clinical Research Unit (CRU), Centro de Investiga\u00e7\u00e3o Interdisciplinar Egas Moniz (CiiEM), Egas Moniz Cooperativa de Ensino Superior, 2829-511 Almada, Portugal"}]},{"given":"Rodrigo","family":"Neiva","sequence":"additional","affiliation":[{"name":"Department of Periodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA"}]}],"member":"1968","published-online":{"date-parts":[[2021,11,25]]},"reference":[{"key":"ref_1","first-page":"17","article-title":"The T\u00fcbinger immediate implant","volume":"27","author":"Schulte","year":"1976","journal-title":"Quintessenz"},{"key":"ref_2","first-page":"332","article-title":"Immediate implant placement into extraction sites: Surgical and restorative advantages","volume":"9","author":"Lazzara","year":"1989","journal-title":"Int. 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