Applicability of Demirjian’s four methods and Willems method for age estimation in a sample of Turkish children

Akkaya, Nursel; Yılancı, Hümeyra Özge; Göksülük, Dinçer

doi:10.1016/j.legalmed.2015.04.003

Cited by 33 publications

(14 citation statements)

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“…Other authors also found underestimated DA in DS individuals [3,7] and other studies in non-DS individuals [5,16,31,32]. Just one author using Nolla method in non-DS individuals found DA overestimated [11] and others overestimated DA in non-DS individuals using Demirjian [33] method [2,10]. Regarding SA estimated using [ ( F i g .…”

Section: Discussionmentioning

confidence: 97%

“…These children, in most cases, are deprived of personal documents, necessary to prove their identity, including age and name. This could impair decision making toward health care and hamper the adoption process [10,14]. CA of an individual involves social, legal and criminal implications and thus its accurate estimation is crucial [1].…”

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confidence: 99%

“…Frequently, tooth mineralization, through DA, and skeletal maturation of the ossification centers of the hand and wrist, through SA, are among the parameters used to estimate the CA and degree of development and growth of an individual [1,8,12]. Tooth mineralization is considered an efficient and accurate variable toward sex differentiation since teeth are less susceptible to nutritional, hormonal and pathological alterations, especially in children [10]. Many are the methods used to estimate CA; however, little has been reported on forensic dentistry toward the identification and age estimation of an individual, a condition deemed crucial for the adoption and legal process [10,15,21,22].…”

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confidence: 99%

“…Tooth mineralization is considered an efficient and accurate variable toward sex differentiation since teeth are less susceptible to nutritional, hormonal and pathological alterations, especially in children [10]. Many are the methods used to estimate CA; however, little has been reported on forensic dentistry toward the identification and age estimation of an individual, a condition deemed crucial for the adoption and legal process [10,15,21,22].…”

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confidence: 99%

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Comparison of accuracy between dental and skeletal age in the estimation of chronological age of Down syndrome individuals

Hala

Moraes

Villaça-Carvalho

et al. 2016

Forensic Science International

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This study aimed to evaluate the accuracy of dental age (DA) and skeletal age (SA) methods in order to estimate chronological age (CA) in individuals with Down syndrome (DS), contributing to the Forensic Dentistry and making the identification of these individuals age possible. For this, 278 images of individuals were selected and divided in 2 groups: 216 non-DS patients and 62 with DS. At first, DA was evaluated by Nolla method, on panoramic radiographs, followed by SA, evaluated by Greulich and Pyle method. The linear correlation coefficient of Pearson was used for the analysis of concordance between the methods. Paired t-test with confidence interval was used to evaluate the accuracy and Bland and Altman method was applied to estimate limits of concordance. Complementary to this first analysis, descriptive statistics and ANOVA test were applied for comparison among chronological age (CA), dental age (DA) and skeletal age (SA), with a significance level of 95% (p≥0.05), ordering to observe the differences among them. DA, estimated by Nolla, is underestimated in both, DS and non-DS individuals, and it is more notable in DS individuals. SA estimated by Greulich and Pyle method is overestimated, except for non-DS males. The range of variance is greater in SA and DS than DA and non-DS individuals, respectively. A greater accordance was found for DA×CA if compared to SA×CA, indicating that DA, estimated by Nolla method, is more accurate than SA, evaluated by Greulich and Pyle method, for estimating CA of both, DS and non-DS individuals. However, neither method seems to be precise and more caution is required for age estimation in DS individuals.

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Section: Discussionmentioning

confidence: 97%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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Comparison of accuracy between dental and skeletal age in the estimation of chronological age of Down syndrome individuals

Hala

Moraes

Villaça-Carvalho

et al. 2016

Forensic Science International

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“…Willems et al [18] adapted Demirjian's method using a large Belgian Caucasian reference sample and avoided calculating maturity scores. The Willems et al model (WM) has been validated in multiple populations (Bangladeshi, Belgian Caucasian, Bosnian-Herzegovian, British Caucasian, Chinese, Former Yugoslav Republic of Macedonian, Malaysian, Serbian, Turkish) and proved to perform better than Demirjian's method [8,[18][19][21][22][23][24][25][26][27]. Overand underestimations have been reported within a mean error range of − 0.58 to 0.39 years.…”

Section: Introductionmentioning

confidence: 99%

Dental age estimation in Somali children using the Willems et al. model

et al. 2018

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New equations for age estimation using four permanent mandibular teeth in Thai children and adolescents

et al. 2018

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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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Applicability of Demirjian’s four methods and Willems method for age estimation in a sample of Turkish children

Cited by 33 publications

References 50 publications

Comparison of accuracy between dental and skeletal age in the estimation of chronological age of Down syndrome individuals

Comparison of accuracy between dental and skeletal age in the estimation of chronological age of Down syndrome individuals

Dental age estimation in Somali children using the Willems et al. model

New equations for age estimation using four permanent mandibular teeth in Thai children and adolescents

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