Acharya Aneesha, Hao Jia, Mattheos Nikos, Chau Anson, Shirke Prashant, Lang Niklaus P
Department of Implant Dentistry, Oral Rehabilitation, Faculty of Dentistry, University of Hong Kong, Hong Kong, SAR Hong Kong, China; Department of Periodontology and Oral Implantology, Dr D. Y. Patil Dental College and Hospital, D Y Patil Vidyapeeth, Pune, India.
Clin Oral Implants Res. 2014 Dec;25(12):1386-94. doi: 10.1111/clr.12292. Epub 2013 Dec 4.
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.
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 (RH), widths at 1 and 3 mm from crest (RW1; RW3), and relative position of the bone crest (RR) were measured.
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 RH < 2 mm. Sites with both RH <8 mm and RW1 < 6 mm 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 RH <5 mm and RH <8 mm more than 2-fold; additionally, gender and ethnicity significantly impacted RH <8 mm. Gender and adjacent tooth status significantly affected RW1.
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- and age-affected residual ridge width.
研究寻求牙齿修复的部分缺牙的亚洲印度人和中国香港人群队列中，无牙上颌第一磨牙位点的剩余牙槽嵴尺寸与牙周骨丧失的关系。
对225名寻求牙齿修复的部分缺牙的亚洲印度成年人（I组）和232名中国香港成年人（C组）进行锥形束计算机断层扫描，分析总共628个无牙上颌第一磨牙位点。记录年龄、种族、性别、牙齿缺失总数、邻牙的有无、根据放射学牙槽骨丧失定义的牙周状况类别（P0：牙周健康，P1：早期至中度疾病，P2：重度牙周疾病）以及鼻窦黏膜异常情况。测量牙槽嵴高度（RH）、距嵴顶1和3mm处的宽度（RW1；RW3）以及骨嵴的相对位置（RR）。
两组中P2状态的患病率最高（C组：50.4%；I组：49.2%）。P2组的牙槽嵴高度最低；C组P2中有13.1%、I组P2中有14%的RH<2mm。RH<8mm且RW1<6mm的位点在C组P2中占59%，在I组P2中占68%。鼻窦黏膜异常在P2组中最常见。牙周状况和鼻窦黏膜异常使RH<5mm和RH<8mm的几率增加超过2倍；此外，性别和种族对RH<8mm有显著影响。性别和邻牙状况对RW1有显著影响。
在寻求牙齿修复的亚洲印度人和中国香港人群中，新发的重度牙周疾病很常见，且与可用骨高度降低有关。种族、性别、鼻窦黏膜增厚影响了鼻窦下区域的可用骨高度，而邻牙的存在和年龄影响剩余牙槽嵴宽度。
