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The aim of the present study was to explore the associations between the keratinized mucosa width (KMW) and the underlying alveolar bone dimensions at partial edentulous molar sites.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>In this retrospective study, a total of 110 patients with at least one missing molar were selected. The buccal KMW of the edentulous molar sites was evaluated. Cone-beam computed tomography scans were collected, and the height discrepancy between the alveolar crest and the buccal bone plate (H<jats:sub>C\u2212B<\/jats:sub>) as well as the alveolar bone height (ABH) were measured. The KMW was compared among the H<jats:sub>C\u2212B<\/jats:sub> and ABH groups at both maxillary and mandibular sites. Linear regression and generalized estimation equations (GEEs) were used to explore the associations between the KMW and alveolar bone dimensions at \u03b1\u2009=\u20090.05.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>Among the 110 patients, 158 edentulous molar sites were analyzed. The average H<jats:sub>C\u2212B<\/jats:sub> and ABH were significantly lower at the maxillary sites (1.26\u2009\u00b1\u20091.62\u00a0mm, 11.62\u2009\u00b1\u20093.94\u00a0mm) than at the mandibular sites (3.67\u2009\u00b1\u20092.85\u00a0mm, 14.91\u2009\u00b1\u20093.01\u00a0mm, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001). The KMW was significantly lower at sites with H<jats:sub>C\u2212B<\/jats:sub> &gt; 2\u00a0mm than at sites with H<jats:sub>C\u2212B<\/jats:sub> \u2264 2\u00a0mm both in the maxilla and mandible (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001). No significant differences were found between the KMW at sites with ABH\u2009&lt;\u200910\u00a0mm and sites with ABH\u2009\u2265\u200910\u00a0mm (<jats:italic>p<\/jats:italic>\u2009&gt;\u20090.05). Linear regression and GEEs analyses revealed that the H<jats:sub>C\u2212B<\/jats:sub> was significantly associated with the KMW (<jats:italic>B<\/jats:italic> = -0.339, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001), while the association between the KMW and the ABH was not statistically significant (<jats:italic>B<\/jats:italic> = -0.046, <jats:italic>p<\/jats:italic>\u2009=\u20090.352).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusions<\/jats:title>\n                <jats:p>The buccal KMW at edentulous molar sites was significantly associated with the H<jats:sub>C\u2212B<\/jats:sub>. Alveolar ridges presenting with a sloped configuration were more prone to possess a narrower band of keratinized mucosa. Both hard and soft tissue augmentation should be considered for implant treatment at these sites. The correlations of dynamic changes between the KMW and alveolar bone dimensions after tooth extraction should be further investigated.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12903-024-04590-2","type":"journal-article","created":{"date-parts":[[2024,7,15]],"date-time":"2024-07-15T13:02:01Z","timestamp":1721048521000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Associations between the keratinized mucosa width and the underlying alveolar bone dimensions at partial edentulous molar sites: a retrospective cross-sectional study"],"prefix":"10.1186","volume":"24","author":[{"given":"Ziyao","family":"Han","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Cui","family":"Wang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yiping","family":"Wei","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gang","family":"Yang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wenjie","family":"Hu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kwok-Hung","family":"Chung","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2024,7,15]]},"reference":[{"key":"4590_CR1","doi-asserted-by":"publisher","first-page":"283","DOI":"10.1002\/JPER.19-0566","volume":"91","author":"G Avila-Ortiz","year":"2020","unstructured":"Avila-Ortiz G, Gonzalez-Martin O, Couso-Queiruga E, Wang H-L. 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All participants signed an informed consent before participating in the study, and the anonymized data was extracted. The study was registered in the Chinese Clinical Trial Registry (ChiCTR-2200064979) and reported following the STROBE guidelines.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"Not applicable.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"The authors declare no competing interests.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"796"}}