Objective To explore the rule of the dental development during deciduous dentition and to evaluate the applicability of Demirjian's method for dental age estimation on children during deciduous dentition,aged 4 to 6. Methods Through cluster sampling from kindergartens in Shenzhen,75 children aged 4-year-old (40 boys,35 girls) were chosen.The serial dental pantomograms,taken at ages 4,5 and 6 years old,were used for dental age assessment according to the Demirjian's method.The differences between dental age and chronological age were compared using paired t-test. Results Through 3-year growth,the second molar,the second premolar premolar,the first premolar premolar were at the stage of dental crown development,while the first molar,the canine,the lateral incisor and the central incisor at the stage of dental root formation.In terms of relative growth,female subjects exhibited an more mature teeth development than male subjects between 4 and 6 years old.A significant difference was found between chronological age and dental age. Conclusion Demirjian's method need to be modified to be used in dental age assessment on children during deciduous dentition.
Key words
deciduous dentition /
dental age /
Demirjian&apos /
s method
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References
[1] Demirjian A,Goldstein H.New systems for dental maturity based on seven and four teeth[J].Ann Hum Biol,1976,3(5):411-421.
[2] Prabhakar AR,Panda AK,Raju OS.Applicability of Demirjian's method of age assessment in children of Davangere[J].J Indian Soc Pedod Prev Dent,2002,20(2):54-62.
[3] McKenna CJ,James H,Taylor JA,et al.Tooth development standards for South Australia[J].Aust Dent J,2002,47(3):223-227.
[4] Leurs IH,Wattel E,Aartman IH,et al.Dental age in Dutch children[J].Eur J Orthod,2005,27(3):309-314.
[5] Teivens A,Mrnstad H.A modification of the Demirjian method for age estimation in children[J].J Forensic Odontostomatol,2001,19(2):26-30.
[6] Eid RM,Simi R,Friggi MN,et al.Assessment of dental maturity of Brazilian children aged 6 to 14 years using Demirjian's method[J].Int J Paediatr Dent,2002,12(6):423-428.
[7] Hgg U,Matsson L.Dental maturity as an indicator of chronological age:the accuracy and precision of three methods[J].Eur J Orthod,1985,7(1):25-34.
[8] Davis PJ,Hgg U.The accuracy and precision of the "Demirjian system" when used for age determination in Chinese children[J].Swed Dent J,1994,18(3):113-116.
[9] 范建林,周文莲.应用Demirjian法测定北京地区6～16岁儿童的牙龄[J].口腔医学,2005,25(3):179-181.
[10] Chen JW,Guo J,Zhou J,et al.Assessment of dental maturity of western Chinese children using Demirjian's method[J].Forensic Sci Int,2010,197(1/2/3):119.e1-119.e4.
[11] 李萌,李果,王虎.Demirjian牙龄推断法及其应用与更新[J].国际口腔医学杂志,2014,41(6):725-729.
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