{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T07:20:40Z","timestamp":1791357640113,"version":"4.3.1"},"reference-count":48,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2024,7,23]],"date-time":"2024-07-23T00:00:00Z","timestamp":1721692800000},"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":["J Clinic Periodontology"],"published-print":{"date-parts":[[2024,10]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Aim<\/jats:title><jats:p>This study aimed to assess hard and soft tissue contour changes following micro crestal flap\u2010alveolar ridge preservation (MCF\u2010ARP) and natural healing (NH) in periodontally compromised molar extraction sites and to analyse the feasibility and need for bone augmentation during implant therapy.<\/jats:p><\/jats:sec><jats:sec><jats:title>Materials and Methods<\/jats:title><jats:p>Fifty\u2010six patients with 70 sites were randomized into two groups at the site level (35 sites from 31 patients in the test group and 35 sites from 29 patients in the control group). Among whom, four patients contributed one tooth to the control group and one tooth to the test group. Hard tissue indicators were measured using cone beam computed tomography performed before tooth extraction and 6\u2009months after surgery. Soft tissue contour changes were assessed using intraoral scanning performed before and immediately after surgery and also 2\u2009weeks and 1, 3 and 6\u2009months after surgery.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Six months after surgery, the MCF\u2010ARP group showed less resorption in buccal bone height (<jats:italic>p<\/jats:italic>\u2009=\u2009.032) and greater augmentation in central bone height (<jats:italic>p<\/jats:italic>\u2009=\u2009.001) and ridge width (<jats:italic>p<\/jats:italic>\u2009=\u2009.009). The mean, vertical and horizontal collapse of buccal soft tissue contour in the MCF\u2010ARP group were 0.95\u2009mm (<jats:italic>p<\/jats:italic>\u2009=\u2009.010), 0.61\u2009mm (<jats:italic>p<\/jats:italic>\u2009=\u2009.019) and 0.56\u2009mm (<jats:italic>p<\/jats:italic>\u2009=\u2009.013) less than that in the NH group, respectively. There were significantly (<jats:italic>p<\/jats:italic>\u2009=\u2009.007) fewer sites in the MCF\u2010ARP group than in the NH group (0% vs. 26.7%) for staged bone augmentation and more sites that could be treated with simple implant procedure in the MCF\u2010ARP group than in the NH group (71.9% vs. 56.6%).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Compared with NH, MCF\u2010ARP reduced bone resorption in periodontally compromised molar extraction sites and maintained the buccal soft tissue contour. MCF\u2010ARP reduces the need for complex bone augmentation procedures in implant therapy. <jats:italic>Trial registration<\/jats:italic>: Chinese Clinical Trial Register (ChiCTR) ChiCTR2200056335. Registered on 4 February 2022, Version 1.0.<\/jats:p><\/jats:sec>","DOI":"10.1111\/jcpe.14045","type":"journal-article","created":{"date-parts":[[2024,7,24]],"date-time":"2024-07-24T01:10:01Z","timestamp":1721783401000},"page":"1311-1322","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Assessment of soft and hard tissue changes following micro crestal flap\u2014Alveolar ridge preservation and augmentation at molar extraction sites in patients with stage <scp>III<\/scp>\/<scp>IV<\/scp> periodontitis: A randomized controlled trial"],"prefix":"10.1111","volume":"51","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2666-6850","authenticated-orcid":false,"given":"Haoyun","family":"Zhang","sequence":"first","affiliation":[{"name":"Department of Periodontology Peking University School and Hospital of Stomatology, National Center for Stomatology, National Clinical Research Center for Oral Diseases, National Engineering 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