{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,24]],"date-time":"2026-08-24T18:51:07Z","timestamp":1787597467441,"version":"build-2736575974"},"reference-count":15,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2022,2,21]],"date-time":"2022-02-21T00:00:00Z","timestamp":1645401600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["aap.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Periodontology"],"published-print":{"date-parts":[[2022,8]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>To date, the efficacy of ridge preservation in the maintenance of the residual alveolar ridge dimension beyond 6 months after treatment is unknown. The purpose of this study was to compare the differences in alveolar ridge dimensional change following ridge preservation between 4\u2010 and 12\u2010month healing time points using cone\u2010beam computed tomography (CBCT).<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Fifty seven patients planned for tooth extraction and implant placement were enrolled. Following extraction, ridge preservation was performed. CBCT scans were taken within 72\u00a0hours following extraction with a customized resin stent containing a fixed radiographic marker. At either 4 months (short\u2010term, ST group) or 12 months (long\u2010term, LT group) after ridge preservation, patients had a second CBCT taken and an implant placed. Changes in ridge height and width were measured using the standardized radiographic marker.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>No significant differences were detected between the ST and LT groups in loss of buccal and lingual ridge height. Similarly, when adjusted for baseline ridge width, no significant differences were detected in ridge width loss at 3, 5, and 7\u00a0mm apical to the crest between the ST and LT groups.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>The efficacy of ridge preservation in the maintenance of ridge width and height at the 12\u2010month time point is similar to that of the 4\u2010month time point. Clinicians may feel confident that a delay in implant placement for up to a year has no significant negative impact on the height and width of the healed ridge.<\/jats:p><\/jats:sec>","DOI":"10.1002\/jper.21-0607","type":"journal-article","created":{"date-parts":[[2022,1,19]],"date-time":"2022-01-19T09:08:38Z","timestamp":1642583318000},"page":"1183-1190","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Long\u2010term preservation of ridge dimension following tooth extraction and ridge preservation: A randomized controlled trial of healing at 4\u2010 and 12\u2010month healing time points"],"prefix":"10.1002","volume":"93","author":[{"given":"Hunter T.","family":"Allen","sequence":"first","affiliation":[{"name":"Department of Periodontics University of Texas Health Science Center San Antonio  San Antonio TX"},{"name":"Private practice  Dallas TX"},{"name":"Previously, Department of Periodontics UT Health San Antonio  San Antonio TX"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jacob W.","family":"Zellner","sequence":"additional","affiliation":[{"name":"Department of Periodontics University of Texas Health Science Center San Antonio  San Antonio TX"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Georgios A.","family":"Kotsakis","sequence":"additional","affiliation":[{"name":"Department of Periodontics University of Texas Health Science Center San Antonio  San Antonio TX"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Brian L.","family":"Mealey","sequence":"additional","affiliation":[{"name":"Department of Periodontics University of Texas Health Science Center San Antonio  San Antonio 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