{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,9]],"date-time":"2026-01-09T21:38:49Z","timestamp":1767994729494,"version":"3.49.0"},"reference-count":41,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2019,11,14]],"date-time":"2019-11-14T00:00:00Z","timestamp":1573689600000},"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":[[2020,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Marginal bone stability is considered one of the most important issues in implant dentistry. It is essential to understand how various factors influence bone resorption around implants. The purpose of this retrospective longitudinal study was to identify potential risk indicators associated with marginal bone resorption around implants in function for at least 4\u00a0years.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Several systemic\u2010related, intraoral\u2010related, implant\u2010related factors were collected. Marginal bone level change (MBLC) was determined by comparing intraoral radiographs taken at baseline (1\u00a0year after prosthesis delivery), and at follow\u2010up (over 3\u00a0years from baseline). A hierarchical regression analysis using liner mixed\u2010effects models was performed to examine correlations between MBLC and various factors.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Overall, 514 patients with 1535 implants were analyzed. The mean age of the participants was 62.9\u00a0years. Mean annual MBLC was 0.048\u00a0mm, and mean functional time was 5.96\u00a0years. The result showed that the following explanatory variables had significant effects on MBLC: functional time, plaque control record\u00a0&gt;\u00a020%, Eichner index C1\u20103, maxilla, cement\u2010retained superstructure, and keratinized mucosa width\u00a0&lt;\u00a02\u00a0mm. We did not find statistically significant associations between bone resorption and some variables known as risk factors, such as diabetes, smoking, and history of periodontitis.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Within the limits of this study, longer functional time, poor oral hygiene, loss of occlusal support, location in the maxilla, cement\u2010retained superstructure, and less keratinized mucosa should be considered as risk indicators for bone resorption around implants.<\/jats:p><\/jats:sec>","DOI":"10.1002\/jper.18-0756","type":"journal-article","created":{"date-parts":[[2019,8,2]],"date-time":"2019-08-02T09:47:21Z","timestamp":1564739241000},"page":"37-45","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Risk indicators for marginal bone resorption around implants in function for at least 4\u00a0years: A retrospective longitudinal 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