The chronology of second and third molar development in Koreans and its application to forensic age estimation

Lee, Sang-Seob; Byun, Young-Sub; Park, Myung Jin; Jh, Choi; Yoon, Chohee; Shin, Kyoung Jin

doi:10.1007/s00414-010-0513-x

Cited by 37 publications

(41 citation statements)

References 25 publications

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“…Third molar development is generally completed 4 -6 months M a n u s c r i p t earlier in males [7,21]. In Koreans, completion of the Demirjian stage H in male third molars has been reported up to 2 years ahead of females [12]. Our results suggest a higher female variability of age at each stage, which may be due to a slower development.…”

Section: Discussionmentioning

confidence: 50%

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Age estimation in the living: Transition analysis on developing third molars

Tangmose

Thevissen

Lynnerup

et al. 2015

Forensic Science International

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A radiographic assessment of third molar development is essential for differentiating between juveniles and adolescents in forensic age estimations. As the developmental stages of third molars are highly correlated, age estimates based on a combination of a full set of third molar scores are statistically complicated. Transition analysis (TA) is a statistical method developed for estimating age at death in skeletons, which combines several correlated developmental traits into one age estimate including a 95% prediction interval. The aim of this study was to evaluate the performance of TA in the living on a full set of third molar scores. A cross sectional sample of 854 panoramic radiographs, homogenously distributed by sex and age (15.0-24.0 years), were randomly split in two; a reference sample for obtaining age estimates including a 95% prediction interval according to TA; and a validation sample to test the age estimates against actual age. The mean inaccuracy of the age estimates was 1.82 years (±1.35) in males and 1.81 years (±1.44) in females. The mean bias was 0.55 years (±2.20) in males and 0.31 years (±2.30) in females. Of the actual ages, 93.7% of the males and 95.9% of the females (validation sample) fell within the 95% prediction interval. Moreover, at a sensitivity and specificity of 0.824 and 0.937 in males and 0.814 and 0.827 in females, TA performs well in differentiating between being a minor as opposed to an adult. Although accuracy does not outperform other methods, TA provides unbiased age estimates which minimize the risk of wrongly estimating minors as adults. Furthermore, when corrected ad hoc, TA produces appropriate prediction intervals. As TA allows expansion with additional traits, i.e. stages of development of the left hand-wrist and the clavicle, it has a great potential for future more accurate and reproducible age estimates, including an estimated probability of having attained the legal age limit of 18 years.

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Section: Discussionmentioning

confidence: 50%

“…A few published studies provide age estimates from combinations of a full set of third molar scores [1,11,12]. Unfortunately, such statistical models are complicated due to the correlation between the developmental stages of third molars, i.e.…”

Section: Introductionmentioning

confidence: 99%

Age estimation in the living: Transition analysis on developing third molars

Tangmose

Thevissen

Lynnerup

et al. 2015

Forensic Science International

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“…A avaliação dos estágios de mineralização de terceiros molares através de radiografias panorâmicas é considerado um método de baixo custo, fácil execução e passível de reprodução para identificação da idade cronológica [4][5][6][7][8][9][10]12,15 .…”

Section: Discussionunclassified

“…Entretanto, não é sempre que se tem à disposição restos mortais íntegros ou contendo todas as estruturas do esqueleto humano. Por tal motivo, alguns estudos têm voltado sua atenção para a análise do estágio de desenvolvimento dos terceiros molares e sua relação com a idade cronológica de crianças, adolescentes e adultos jovens [4][5][6][7][8][9][10][11] .…”

Section: Introductionunclassified

Estágio de mineralização dos terceiros molares e sua relação com a idade cronológica: uma amostra da população do Centro-Oeste do Brasil

Gundim

Sousa

Silva

et al. 2014

Rev. odontol. UNESP

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ResumoIntrodução: Nos últimos anos, alguns estudos foram conduzidos com o objetivo de avaliar a aplicabilidade da análise de desenvolvimento dos terceiros molares na estimativa da idade humana. No entanto, há escassez de trabalhos em amostras populacionais da região Centro-Oeste do Brasil. Objetivo: Avaliar a relação entre estágio de desenvolvimento dos terceiros molares inferiores e a idade cronológica de indivíduos da região Centro-Oeste do Brasil. Material e método: Trata-se de um estudo observacional transversal, com uma amostra constituída por 120 prontuários de pacientes entre 5 e 22 anos de idade, dos gêneros masculino e feminino, atendidos entre os anos de 2007 e 2012 na nossa instituição. O estágio de desenvolvimento dos terceiros molares inferiores foi avaliado pelo método descrito por Nolla e relacionado à idade cronológica do indivíduo por meio de regressão linear, sendo considerados significantes valores de tendência linear entre 0 e 1. Resultado: Pode-se observar que tanto a amostra composta por pacientes do gênero masculino (R 2 = 0,7495) quanto do feminino (R 2 = 0,8507) apresentaram correlação linear entre o estágio de desenvolvimento dos terceiros molares inferiores e a idade cronológica. Notou-se, ainda, que os estágios de desenvolvimento coincidiram com idades semelhantes em ambos os gêneros. Conclusão: Há relação entre a idade cronológica e o estágio de desenvolvimento dos terceiros molares inferiores na amostra estudada. Estes dados sugerem que este tipo de análise deve ser individualizada, de acordo com as características populacionais da região.Descritores: Radiografia panorâmica; terceiro molar; determinação da idade pelos dentes. AbstractIntroduction: In recent years some studies have been taken to evaluate the applicability of the third molar development analysis in the estimation of human age. However, just a few studies with the population from Midwest Brazil were performed. Objective: The present study aim to analyze the relationship between the lower third molars development stage and the chronological age of individuals in Midwest Brazil region. Material and method: This cross-sectional observational study comprised a total of 120 panoramic radiographies of patients aged 5-22 yearold, males and females, attended between 2007 and 2012 at our Institution. The third molars development stage was analyzed based on the method described by Nolla and related with the chronological age of the individual by linear regression. It was considered significant values for linear tendency between 0-1. Result: It was observed that both, male patients (R 2 = 0.7495) and females (R 2 = 0.8507), showed a linear correlation between the third molars development stage and chronological age. It was also noted that the development stages coincided with similar ages in both genders. Conclusion: There is a relationship between chronological age and developmental stage of the third molars in the sample studied. These data suggest that this type of analysis should be individualized according to the population ...

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“…(5) Different methods have been used for evaluating dental development using radiography. (6)(7)(8) Of these, the Demirjian method of dental age assessment has been used more frequently than other methods (10) because it is more accurate (6,(10)(11) and has more clearly defined developmental stages. (12,13) However, the limitation of the Demirjian method is that it can estimate age only up to the end of calcification of seven teeth (formation of dental apex), i.e., up to the age of 16 years, because it estimates age according to the developmental stage of the seventh permanent tooth on the panoramic radiograph.…”

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confidence: 99%