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《Chinese Journal of Stomatology》 2005-06
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A survey of number and morphology anomalies in permanent teeth of 6 453 youths between 17 to 21 years old

WU Hua, FENG Hai-lan. Department of Prosthodontics, Peking University School of Stomatology, Beijing 100081, China  
Objective To investigate the status of number and morphology anomalies in the permanent teeth. Methods A survey of anomalies of number and morphology in the permanent teeth was carried out in 6 453 students who were 17 to 21 years old in 3 colleges during 2002 to 2004. Chi-square test was used to analyze the sex distribution, the involved tooth types and the associated anomalies. Results The overall prevalence of dental number and morphology anomalies was 16.07%. The prevalence rates of peg-shape (conical) tooth, dens evaginatus and hypodontia were higher in females compared to males (P0.05). Dens invaginatus and peg-shape teeth often involved maxillary lateral incisors, Dens envaginatus often involved mandibular second premolars. Fused teeth and hypodontia often involved mandibular incisors. The prevalence of hypodontia coincident with peg-shaped teeth was higher than other associated anomalies (P0.01). Conclusions The result was similar to other investigations, but peg-shape teeth and dens evaginatus were more prevalent in females than in males.
【Fund】: 教育部教育振兴行动计划特殊专项“985”工程基金资助项目(2001-10)
【CateGory Index】: R78;
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