{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,3]],"date-time":"2026-08-03T20:44:56Z","timestamp":1785789896548,"version":"3.56.0"},"reference-count":57,"publisher":"Wiley","issue":"12","license":[{"start":{"date-parts":[[2013,12,4]],"date-time":"2013-12-04T00:00:00Z","timestamp":1386115200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Clinical Oral Implants Res"],"published-print":{"date-parts":[[2014,12]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objectives<\/jats:title><jats:p>To study residual ridge dimensions at edentulous first molar sites in relation to periodontal bone loss among cohorts of partially edentulous Asian Indian and Hong Kong Chinese subjects seeking tooth replacement.<\/jats:p><\/jats:sec><jats:sec><jats:title>Materials and methods<\/jats:title><jats:p>A total of 628 edentulous maxillary first molar sites were analyzed on Cone Beam Computed Tomography scans of 225 Asian Indian (I) and 232 Hong Kong Chinese (C) partially edentulous adults seeking tooth replacement. Age, ethnicity, gender, total tooth loss, the presence or absence of adjacent teeth, categories of periodontal status defined according to radiographic alveolar bone loss (P0: periodontal health, P1: incipient to moderate disease, P2: severe periodontal disease) and sinus membrane abnormalities were noted. Alveolar ridge height (<jats:styled-content style=\"fixed-case\">RH<\/jats:styled-content>), widths at 1 and 3\u00a0mm from crest (<jats:styled-content style=\"fixed-case\">RW<\/jats:styled-content>1; <jats:styled-content style=\"fixed-case\">RW<\/jats:styled-content>3), and relative position of the bone crest (<jats:styled-content style=\"fixed-case\">RR<\/jats:styled-content>) were measured.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Prevalence of P2 status was most frequent in both cohorts(C: 50.4% I: 49.2%). P2 had lowest ridge heights; 13.1% C P2 and 14%I P2 had <jats:styled-content style=\"fixed-case\">RH<\/jats:styled-content>\u00a0&lt;\u00a02\u00a0mm. Sites with both <jats:styled-content style=\"fixed-case\">RH<\/jats:styled-content>\u00a0&lt;8\u00a0mm and <jats:styled-content style=\"fixed-case\">RW<\/jats:styled-content>1\u00a0&lt;\u00a06\u00a0mm occurred at 59%C P2 and 68%I P2. Sinus membrane abnormalities were most frequent in P2. Periodontal status and sinus membrane abnormality increased the odds of <jats:styled-content style=\"fixed-case\">RH<\/jats:styled-content>\u00a0&lt;5\u00a0mm and <jats:styled-content style=\"fixed-case\">RH<\/jats:styled-content>\u00a0&lt;8\u00a0mm more than 2\u2010fold; additionally, gender and ethnicity significantly impacted <jats:styled-content style=\"fixed-case\">RH<\/jats:styled-content>\u00a0&lt;8\u00a0mm. Gender and adjacent tooth status significantly affected <jats:styled-content style=\"fixed-case\">RW<\/jats:styled-content>1.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Incident advanced periodontal disease was common among Asian Indian and Hong Kong Chinese subjects seeking tooth replacement and associated with lower available bone heights. Ethnicity, gender, sinus membrane thickening affected available bone height in the subsinus region, while the presence of adjacent teeth\u2010 and age\u2010affected residual ridge width.<\/jats:p><\/jats:sec>","DOI":"10.1111\/clr.12292","type":"journal-article","created":{"date-parts":[[2013,12,5]],"date-time":"2013-12-05T02:12:45Z","timestamp":1386209565000},"page":"1386-1394","source":"Crossref","is-referenced-by-count":21,"title":["Residual ridge dimensions at edentulous maxillary first molar sites and periodontal bone loss among two ethnic cohorts seeking tooth replacement"],"prefix":"10.1111","volume":"25","author":[{"given":"Aneesha","family":"Acharya","sequence":"first","affiliation":[{"name":"Department of Implant Dentistry Oral Rehabilitation Faculty of Dentistry University of Hong Kong Hong Kong SAR Hong Kong China"},{"name":"Department of Periodontology and Oral Implantology Dr D. Y. Patil Dental College and Hospital D Y Patil Vidyapeeth Pune India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jia","family":"Hao","sequence":"additional","affiliation":[{"name":"Department of Implant Dentistry Oral Rehabilitation Faculty of Dentistry University of Hong Kong Hong Kong SAR Hong Kong China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nikos","family":"Mattheos","sequence":"additional","affiliation":[{"name":"Department of Implant Dentistry Oral Rehabilitation Faculty of Dentistry University of Hong Kong Hong Kong SAR Hong Kong China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anson","family":"Chau","sequence":"additional","affiliation":[{"name":"Department of Radiography Faculty of Dentistry University of Hong Kong Hong Kong SAR Hong Kong China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Prashant","family":"Shirke","sequence":"additional","affiliation":[{"name":"Department of Oral Radiology INsight CBCT Bandra Mumbai India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Niklaus P.","family":"Lang","sequence":"additional","affiliation":[{"name":"Department of Implant Dentistry Oral Rehabilitation Faculty of Dentistry University of Hong Kong Hong Kong SAR Hong Kong China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2013,12,4]]},"reference":[{"key":"e_1_2_7_2_1","first-page":"201","article-title":"Some racial contrasts in teeth and dental arches","volume":"82","author":"Aitchison J.","year":"1965","journal-title":"The Dental Magazine and Oral 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