Author(s): SHI Jia-yi, TU Ling, LI Feng-hua, School of Stomatology, Central South University, Xiangya Stomatological Hospital of Central South University
Pages: 1303-1307
Year: 2016 Issue:  12
Journal: Journal of Oral Science Research
Keyword:  Shimen County of Changde City; Ancient tooth; Morphology; Measurement; Comparison;
Abstract: Objective:To compare the morphological structure of ancient human teeth found in Shimen County,Changde City,Hunan Province and modern teeth.Methods:Sound permanent ancient teeth were collected,and modern permanent teeth were selected following the principle:the same kind in same site.Morphological indexes,including the tooth length,crown length,root length,mesiodistal diameter of crown and cervix,labiolingual diameter of crown and cervix were recorded.The cross-section area of each tooth was measured.The data were statistically analyzed.Resluts:The crown length and root length of the ancient teeth are longer than that of modern teeth.In maxilla I1,P1,M1 and mandible I1,I2,C,P2,the differences were statistically significant(P<0.05).The mesiodistal diameter of crown and cervix,the labiolingual diameter of crown and cervix of ancient tooth were longer than that of moden ones.The cross-section area of the ancient tooth was larger than that of modern teeth but without significant differences.Conclusion:Ancient human teeth were significantly longer than modern teeth.