Abstract
The purposes of this study were to generate new age estimation equations using two four-teeth methods and to test the accuracy of the resulting equations in comparison with Demirjian and Goldstein four-teeth methods in a Thai population. A sample of 720 digital panoramic radiographs of Thai individuals (360 males and 360 females), aged between 7 and 15 years was randomly selected and assessed for age estimation. The new equations were developed using quadratic regression analysis. The results showed the Thai population-specific equations had a strong relationship between the dental maturity score and the chronological age in both sexes (r = 0.946–0.956). The new equations revealed no statistically significant differences between the estimated and the chronological ages in either sex. On the other hand, Demirjian and Goldstein four-teeth methods showed statistically significant differences between the estimated and the chronological ages in both sexes. Moreover, we found slight differences in the mean absolute error between Demirjian and Goldstein methods and our new equations (0.01 years for males and 0.03 years for females in method I and 0.04 years for males and 0.02 years for females in method II) and the root mean square error between Demirjian and Goldstein methods and our new equations (0.02 years for males and 0.04 years for females in method I and 0.00 years for males and 0.04 years for females in method II). In summary, although Thai population-specific equations provide a slightly increased accuracy in age estimation in Thai children and adolescents, Demirjian and Goldstein methods are still relevant.
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Akkaya N, Yilanci HÖ, Göksülük D (2015) Applicability of Demirjian’s four methods and Willems method for age estimation in a sample of Turkish children. Leg Med (Tokyo) 17(5):355–359
Olze A, Reisinger W, Geserick G, Schmeling A (2006) Age estimation of unaccompanied minors. Part II. Dental aspects. Forensic Sci Int 159(Suppl 1):S65–S67
Greulich WW, Pyle SI (1959) Radiographic atlas of skeletal development of the hand and wrist. Stanford University Press
Schour I, Massler M (1941) The development of the human dentition. J Am Dent Assoc 28:1153–1160
Demirjian A, Goldstein H, Tanner JM (1973) A new system of dental age assessment. Hum Biol 45:211–227
Garn SM, Lewis AB, Blizzard RM (1965) Endocrine factors in dental development. J Dent Res 44(Suppl):243–258
Bagherpour A, Imanimoghaddam M, Bagherpour MR, Einolghozati M (2010) Dental age assessment among Iranian children aged 6–13 years using the Demirjian method. Forensic Sci Int 197:121.e1–121.e4
Willems G, Van Olmen A, Spiessens B, Carels C (2001) Dental age estimation in Belgian children: Demirjian’s technique revisited. J Forensic Sci 46:893–895
Maber M, Liversidge HM, Hector MP (2006) Accuracy of age estimation of radiographic methods using developing teeth. Forensic Sci Int 159:S68–S73
Maia MC, Martins Mda G, Germano FA, BrandaoNeto J, da Silva CA (2010) Demirjian’s system for estimating the dental age of northeastern Brazillian children. Forensic Sci Int 200:177.e1–177.e4
Nik-Hussein NN, Kee KM, Gan P (2011) Validity of Demirjian and Willems methods for dental age estimation for Malaysian children aged 5–15 years old, Forensic Sci Int. 204:208.e.1–208.e.6
Lee SS, Kim D, Lee S, Lee UY, Seo JS, Ahn YW, Han SH (2011) Validity of Demirjian’s and modified Demirjian’s methods in age estimation for Korean juveniles and adolescents. Forensic Sci Int 211:41–46
Jayaraman J, King NM, Roberts GJ, Wong HM (2011) Dental age assessment: are Demirjian’s standards appropriate for southern Chinese children? J Forensic Odontostomatol 29:22–28
Flood SJ, Mitchell WJ, Oxnard CE, Turlach BA, McGeachie J (2011) A comparison of Demirjian’s four dental development methods for forensic age assessment. J Forensic Sci 56:1610–1615
Sukhia RH, Fida M, Azam SI (2012) Dental age table for a sample of Pakistani children. Eur J Orthod 34:77–82
Baghdadi ZD (2013) Dental maturity in Saudi children using the Demirjian method: a comparative study and new prediction models. ISRN Dent 2013:1–9
Djukic K, Zelic K, Milenkovic P, Nedeljkovic N, Djuric M (2013) Dental age assessment validity of radiographic methods on Serbian children population. Forensic Sci Int 231:398.e1–398.e5
Flood SJ, Franklin D, Turlach BA, McGeachie J (2013) A comparison of Demijian’s four dental development methods for forensic age estimation in South Australian sub-adults. J Forensic Legal Med 20:875–883
Ambarkova V, Galic I, Vodanovic M, Biocina-Lukenda D, Brkic H (2014) Dental age estimation using Demirjian and Willems methods: cross sectional study on children from the former Yugoslav Republic of Macedonia. Forensic Sci Int 234:187.e1–187.e7
Duangto P, Janhom A, Prasitwattanaseree S, Mahakkanukrauh P, Iamaroon A (2016) New prediction models for dental age estimation in Thai children and adolescents. Forensic Sci Int 266:583.e1–583.e5
Alshihri AM, Kruger E, Tennant M (2016) Dental age assessment of 4–16 year old Western Saudi children and adolescents using Demirjian’s method for forensic dentistry. Egypt J Forensic Sci 6:152–156
Melo M, Ata-Ali J (2017) Accuracy of the estimation of dental age in comparison with chronological age in a Spanish sample of 2641 living subjects using the Demirjian and Nolla methods. Forensic Sci Int 270:276.e1–276.e7
Chen JW, Guo J, Zhou J, Liu RK, Chen TT, Zou SJ (2010) Assessment of dental maturity of western Chinese children using Demirjian’s method. Forensic Sci Int 197:119.e1–119.e4
Ogodescu AE, Ogodescu A, Szabo K, Tudor A, Bratu E (2011) Dental maturity—a biological indicator of chronological age: digital radiographic study to assess dental age in Romanian children. Int J Biol Biomed Eng 5:32–40
Mohammed RB, Sanghvi P, Perumalla KK, Srinivasaraju D, Srinivas J, Kalyan US et al (2015) Accuracy of four dental age estimation methods in Southern Indian children. J Clin Diagn Res 9:1–8
Blenkin MR, Evans W (2010) Age estimation from the teeth using a modified Demirjian system. J Forensic Sci 55:1504–1508
Ajmal M, Assiri KI, Al-Ameer KY, Assiri AM, Luqman M (2012) Age estimation using third molar teeth: a study on southern Saudi population. J Forensic Dent Sci 4(2):63–65
Lopez TT, Arruda CP, Rocha M, Rosin AS, Michel-Crosato E, Biazevic MG (2013) Estimating ages by third molars: stages of development in Brazilian young adults. J Forensic Legal Med 20(5):412–418
Chaillet N, Nystrom M, Demirjian A (2005) Comparison of dental maturity in children of different ethnic origins: international maturity curves for clinician. J Forensic Sci 50(5):1164–1174
Liversidge HM, Chaillet N, Mörnstad H, Nyström M, Rowlings K, Taylor J, Willems G (2006) Timing of Demirjian’s tooth formation stages. Ann Hum Biol 33(4):454–470
Thevissen PW, Alqerban A, Asaumi J, Kahveci F, Kaur J, Kim YK, Pittayapat P, van Vlierberghe M, Zhang Y, Fieuws S, Willems G (2010) Human dental age estimation using third molar developmental stages: accuracy of age predictions not using country specific information. Forensic Sci Int 201:106–111
Raungpaka S (1988) The study of tooth-development age of Thai children in Bangkok. J Dent Assoc Thai 38(2):72–81
Verochana K, Prapayasatok S, Janhom A, Mahasantipiya P, Korwanich N (2016) Reliability of an equation for age estimation from lower third molar development in a Thai population. Imaging Sci Dent 46:1–7
Demirjian A, Goldstein H (1976) New systems for dental maturity based on seven and four teeth. Ann Hum Biol 3:411–421
Farah CS, Booth DR, Knott SC (1999) Dental maturity of children in Perth, Western Australia, and its application in forensic age estimation. J Clin Forensic Med 6:14–18
Landis JR, Koch GG (1977) The measurement of observer agreement for categorical data. Biometrics 33:159–174
Willems G, Lee SS, Uys A, Bernitz H, Cadenas de Llano-Pérula M, Fieuws S, Thevissen P (2018) Age estimation based on Willems method versus new country-specific method in South African black children. Int J Legal Med 132:599–607. https://doi.org/10.1007/s00414-017-1686-3
Koshy S, Tandon S (1998) Dental age assessment: the applicability of Demirjian’s method in South Indian children. Forensic Sci Int 94(1–2):73–85
Davidson LE, Rodd HD (2001) Interrelationship between dental age and chronological age in Somali children. Community Dent Health 18(1):27–30
Acknowledgements
The authors are grateful to the Dental Hospital, Faculty of Dentistry, Chiang Mai University and University of Phayao, Phayao, Thailand, for their kind support of this research. We would also like to thank Dr. M. Kevin O Carroll, Professor Emeritus of the University of Mississippi School of Dentistry, USA, and Faculty Consultant, Chiang Mai University, Faculty of Dentistry, Thailand, for his assistance in manuscript preparation.
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Duangto, P., Janhom, A., Prasitwattanaseree, S. et al. New equations for age estimation using four permanent mandibular teeth in Thai children and adolescents. Int J Legal Med 132, 1743–1747 (2018). https://doi.org/10.1007/s00414-018-1805-9
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DOI: https://doi.org/10.1007/s00414-018-1805-9