title: The chronological age estimation of third molar mineralization of Han population in southwestern China.
abstract: The purpose of the study was to estimate the chronology of third molar mineralization in Han population of southwestern China and find its unique characteristics so that it would provide a reference in several legal cases like forensic age estimation. The study used Demirjian's staging method to study 2192 orthopantomograms of 984 male and 1208 female subjects aged between 8 and 25 years. The statistical data was analyzed by Student's t test and ANOVA. The conclusions of the study are: (1) The chronological mineralization age of third molars of Han population in Southwestern China is similar to the Turkish and the Japanese, was earlier than the Austrian and Han of South China, but later than the Spanish. (2) The mineralization timing of the third molars between two sides in maxilla or mandible has no significant differences in the same gender group. (3) There is no significant difference in mineralization of third molars between male and female, except for tooth 48 in Demirjian's stage E. (4) The mineralization of third molar in maxilla is earlier than mandible.
authors.affiliation: Stomatology Department, Fuling Center Hospital of Chongqing City, China. Electronic address: doudouwq23@gmail.com.
authors.forename: Maofeng
authors.initials: M
authors.lastname: Qing
authors.affiliation: The Affiliated Hospital of Stomatology, Chongqing Medical University, China. Electronic address: gqyidi2001@yahoo.com.cn.
authors.forename: Lihua
authors.initials: L
authors.lastname: Qiu
authors.affiliation: Stomatology Department of the Second Affiliated Hospital of ChongQing Medical, China.
authors.forename: Zhi
authors.initials: Z
authors.lastname: Gao
authors.affiliation: Department of Oral and Maxillofacial Surgery, 2nd Affiliated Hospital of Jiamusi University, China. Electronic address: drkishorb@gmail.com.
authors.forename: Kishor
authors.initials: K
authors.lastname: Bhandari
mesh_terms: D000293:Adolescent; D000328:Adult; D000366:Age Determination by Teeth / Q000379:methods*; D000704:Analysis of Variance; D002648:Child; D002681:China / Q000208:ethnology; D005006:Ethnicity; D005260:Female; D005553:Forensic Dentistry; D006801:Humans; D008297:Male; D008964:Molar, Third / Q000254:growth & development*; D011862:Radiography, Panoramic; D012727:Sex Characteristics; D014074:Tooth Calcification; D055815:Young Adult
keywords: Demirjian's staging method; Forensic age estimation; Third molar mineralization