{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,19]],"date-time":"2026-10-19T03:41:06Z","timestamp":1792381266059,"version":"4.4.0"},"reference-count":52,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2024,12,11]],"date-time":"2024-12-11T00:00:00Z","timestamp":1733875200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2024,12,11]],"date-time":"2024-12-11T00:00:00Z","timestamp":1733875200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["81870773"],"award-info":[{"award-number":["81870773"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Clin Implant Dent Rel Res"],"published-print":{"date-parts":[[2025,2]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Objectives<\/jats:title>\n                    <jats:p>To compare the 5\u2010year outcomes of collagen matrix (CM) and free gingival graft (FGG) used to augment the keratinized mucosa (KM) around posterior dental implants.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Materials and Methods<\/jats:title>\n                    <jats:p>Thirty patients (44 implants) with inadequate KM (&lt;\u20092\u2009mm) on posterior dental implants were randomized into two groups that received KM augmentation with CM or FGG. Clinical measurements comprising the KM width (KMW), buccal mucosal thickness (MT), and clinical parameters were examined in a 5\u2010year follow\u2010up. Marginal bone loss (MBL) was evaluated with standardized radiographs using the paralleling technique. Patient\u2010reported outcomes (PROs) during the first week post\u2010surgery and at the 5\u2010year follow\u2010up were evaluated.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      KMW increased significantly during the follow\u2010up period in both groups. The FGG group had a significantly greater KMW than the CM group at the 1, 2\u2010month follow\u2010up and after the 6\u2010month follow\u2010up. KM shrinkage was observed, and was greatest within the first 2\u2009months post\u2010surgery in both groups. At the 5\u2010year follow\u2010up, the KM shrinkage was significantly different between the groups (FGG: 47%; CM: 70%) (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.01). The MT increased significantly in the FGG group. The clinical parameters and MBL were similar between the groups. The bleeding score in the FGG group was higher than that in the CM group (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.05) within the first 2\u2009days post\u2010surgery, while other PROs scores were similar between groups in the first week post\u2010surgery. At 5\u2010year follow\u2010up, all patients were highly satisfied with the treatments.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>FGG was superior to CM in terms of the KM augmentation and MT increase. Except for a slight difference in self\u2010reported bleeding during the first two post\u2010operative days, CM didn't demonstrate other significant advantages in PROMs.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Trial Registration<\/jats:title>\n                    <jats:p>\n                      ChiCTR1800018285 (date of registration: 9\/9\/2018, retrospectively registered. URL:\n                      <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"https:\/\/www.chictr.org.cn\/showproj.html?proj=24156\">https:\/\/www.chictr.org.cn\/showproj.html?proj=24156<\/jats:ext-link>\n                      )\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/cid.13422","type":"journal-article","created":{"date-parts":[[2024,12,11]],"date-time":"2024-12-11T13:08:05Z","timestamp":1733922485000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Efficacy of Collagen Matrix for Establishing Keratinized Mucosa at Dental Implants: A 5\u2010Year Randomized Controlled Trial"],"prefix":"10.1111","volume":"27","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1947-3268","authenticated-orcid":false,"given":"Diyuan","family":"Wei","sequence":"first","affiliation":[{"name":"Department of Periodontology Peking University School of Stomatology  Beijing 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