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《Chinese Journal of Pest Control》 2008-06
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A Survey of Number and Morphology Anomalies in ermanent Teeth of 4637 youths

LI Jun,LI yisu,WANG yuexiu.Stomatology,The Second Hospital of Yulin,Yulin 719000,China.  
Objective To investigate the number and morphology anomalies in the permanent teeth of young people.Methods 4637 yong people were examined,who aged from 17 to 21 years in four middle schools of Yulin during the year of 2004 to 2006.Results The overall prevalence of dental number and morphology anamalies was 16.35%.The prevalence of microdontia,macrodontia or conic shaped tooth,abnormal central cusp and congenital anodontia were higher in female than in male.(P 0.05)Dens invaginatus,microdontia,macrodontia or conic shaped tooth were mainly located in the lateral incisors of the maxilla,abnormal central cusp was mainly located in the second premolar of the mandibular,fused teeth and congenital anodontia were mainly located in the incisors of the mandibular.(P0.01)The incidence of microdontia,macrodontia or conic shaped tooth accompanied with congenital anodontia is high.(P0.01)Conclusion The prevalence,sex predilection and location predilection are consistent with the previous studies.But the prevalence of microdontia,macrodontia,or conic shaped tooth and abnormal central cusp were higher in female than in male.
【CateGory Index】: R781.2
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