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《Stomatology》 2008-03
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Dento-facial morphology study of female children with congenital absence of mandibular incisor

PAN Yong-chu,MA Jun-qing,WANG Lin,ZHANG Wei-bing,GU Ning,HUANG You,CHEN Li-ming.(The Research Institute of Stomatology,Nanjing Medical University,Nanjing 210029,China)  
Objective To examine the dento-facial morphology of the female children with congenital absence of mandibular incisor.Methods Cephalometric analyses for 47 girls aged 12~15 with congenital absence of mandibular incisor(the test group)were conducted and compared with the cephalometric standards from 21 age-matched female subjects without hypodontia or malocclusion(the control group).Results There was no significant difference in all cephalometric measurements between the female children who lacked one mandibular incisor and those who lacked two.The hypodontia group showed smaller UI-NA(mm),IMPA and increased ANB,NA-PA,MP-SN,N-ME,ANS-ME and mandibular length,compared with the control group.Conclusion Female children with congenital absence of mandibular incisor might have a skeletal classⅡappearance,greater retroclination of the anterior teeth,a more clockwise-rotated mandibular plane,an increased vertical facial dimensions,lower vertical facial dimensions and mandibular length.
【Fund】: 江苏省教育厅高校自然科学基金(07KJD320149);; 南京医科大学科学发展基金重点项目(2005NYDZD29);; 南京医科大学科学发展基金项目(NY04023)
【CateGory Index】: R788.5
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