{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,29]],"date-time":"2026-10-29T04:41:45Z","timestamp":1793248905096,"version":"4.5.0"},"reference-count":40,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2022,11,4]],"date-time":"2022-11-04T00:00:00Z","timestamp":1667520000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Clin Implant Dent Rel Res"],"published-print":{"date-parts":[[2023,2]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Introduction<\/jats:title><jats:p>Immediate implant placement in conjunction with partial extraction therapy has been shown to result in functional osseo\u2010 and dento\u2010integration with partial preservation of the periodontal ligament (PDL) in humans. Strategic buccal root retention for PDL preservation is a biologically driven procedure that maintains alveolar ridge dimensions and esthetics, while allowing for implant placement. The aim of this study was to conduct a systematic review of longitudinal clinical outcomes of PDL\u2010mediated ridge preservation in conjunction with implant placement in adults, compared with conventional immediate implant placement with total extractions. The primary outcome for this study was marginal bone level (MBL) changes after strategic buccal root retention implant placement techniques.<\/jats:p><\/jats:sec><jats:sec><jats:title>Materials and Methods<\/jats:title><jats:p>To address a predefined PICOS question, a systematic search of randomized clinical trials and cohort studies with at least 10 participants per group and a minimum 12\u2010month follow\u2010up was conducted. A two\u2010phase systematic selection strategy, data extraction, and risk of bias assessment, was performed independently and in duplicate. Randomized trials were quantitatively analyzed in a meta\u2010analysis.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Ten human studies fulfilled the predefined criteria and were included; three clinical trials and seven cohort studies, for a total of 506 patients and 587 implants. PDL\u2010mediated implant placement of single\u2010rooted periodontally healthy teeth was found to reduce marginal peri\u2010implant bone loss and buccal plate changes as compared to conventional immediate implants across studies, while implant survival and success rates were comparable between the two procedures. A meta\u2010analysis found that bone changes were significantly less when retention of the buccal root section was performed as compared to total extractions (standardized mean difference: [\u22124.53, \u22120.11]); the three clinical trials were, however, largely heterogeneous (<jats:italic>I<\/jats:italic><jats:sup>2<\/jats:sup>: 93.1%; <jats:italic>Q<\/jats:italic>\u00a0=\u00a028.98, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Strategic retention of the buccal root section has a benefit in terms of dimensional ridge stability over conventional immediate implantation when implemented in carefully selected cases of single\u2010rooted teeth.<\/jats:p><\/jats:sec>","DOI":"10.1111\/cid.13150","type":"journal-article","created":{"date-parts":[[2022,11,4]],"date-time":"2022-11-04T15:59:42Z","timestamp":1667577582000},"page":"23-34","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Clinical outcomes of retention of the buccal root section combined with immediate implant placement: A systematic review of longitudinal studies"],"prefix":"10.1111","volume":"25","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8635-9422","authenticated-orcid":false,"given":"Georgios A.","family":"Kotsakis","sequence":"first","affiliation":[{"name":"Department of Periodontics UT Health San Antonio  San Antonio Texas USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas T.","family":"Nguyen","sequence":"additional","affiliation":[{"name":"Division of Periodontics, Faculty of Dentistry McGill University  Montreal Quebec Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Konstantinos","family":"Siormpas","sequence":"additional","affiliation":[{"name":"Private Practice  Larisa Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael A.","family":"Pikos","sequence":"additional","affiliation":[{"name":"Pikos Institute  Trinity Florida USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0707-4478","authenticated-orcid":false,"given":"Snjezana","family":"Pohl","sequence":"additional","affiliation":[{"name":"Department of Oral Medicine and Periodontology University of Rijeka  Rijeka Croatia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dennis","family":"Tarnow","sequence":"additional","affiliation":[{"name":"Department of Periodontology Columbia University College of Dental Medicine  New York City New York USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0795-0864","authenticated-orcid":false,"given":"Miltiadis","family":"Mitsias","sequence":"additional","affiliation":[{"name":"Department of Periodontology and Implant Dentistry, College of Dentistry New York University  New York City New York USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"name":"Root Membrane Group","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2022,11,4]]},"reference":[{"key":"e_1_2_11_2_1","doi-asserted-by":"publisher","DOI":"10.1111\/cid.12340"},{"key":"e_1_2_11_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/cid.12106"},{"issue":"73","key":"e_1_2_11_4_1","first-page":"7","article-title":"Modern implant dentistry based on osseointegration: 50\u2009years of progress, current trends and open questions","volume":"2017","author":"Buser 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