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目的:了解口腔科老年患者系统性疾病与牙齿缺失的关系。方法：对在口腔科就诊的年龄≥60岁的501例老年患者进行罹患系统性疾病及牙齿缺失情况的调查。结果：口腔科老年患者近半数（47.5%）伴发有至少一种系统性疾病，患系统性疾病者比全身健康者缺失较多牙；患二种及二种以上系统性疾病者缺失牙数明显多于全身健康者（P<0.05）。结论：从健康角度，应提高宣传教育，努力防治龋病、牙周病和全身系统性疾病。“,”Objective：To investigate the relationships between medical conditions and tooth-loss in the aged.Methods：According to clinical information from questionnaire and oral examination in investigative cards, the relationships between the prevalence of medical conditions and the number of tooth-loss in 501 old patients in the department of stomatology was analysed.Results：The prevalence of medical conditions was 47.5%(238/501).The rate of tooth-loss was 78.4%(393/501). Mean numbers of missing teeth were significantly higher among those who suffered from two medical conditions. Subjects who had a history of medical conditions were more likely to be missing teeth. Conclusions：The necessity of oral health instruction and general health instruction should be propagated.