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Dental age estimation in Malay children based on all permanent teeth types

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Abstract
The applicability of the Willems et al. model was verified on a collected sample of Malay (Malaysian nationality) children. This sample was split in a reference sample to develop a Malay-specific prediction model based on the Willems et al. method and in a test sample to validate this new developed model. Next, the incorporation of third molars into this model was analyzed. Panoramic radiographs (n = 1,403) of Malay children aged between 4 and 14.99 years (n = 702) and subadults aged between 15 and 23.99 years (n = 701) were collected. The left mandibular seven permanent teeth of the children were scored based on the staging technique described by Demirjian and converted to age using the Willems et al. method. Third molar development of all individuals was staged based on the technique described by Gleiser and Hunt modified by Kohler. Differences between dental age and chronological age were calculated and expressed in mean error (ME), mean absolute error (MAE), and root mean square error (RMSE). The Willems et al. model verified on the collected Malay children overestimated chronological age with a ME around 0.45 year. Small differences in ME, MAE, and RMSE between the verified Malay-specific prediction model and the Willems et al. model were observed. An overall neglected decrease in RMSE was detected adding third molar stages to the developed permanent teeth model.
Keywords
Forensic odontology, Dental age estimation, Malay population, Willems method, Third molars

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MLA
Mohd Yusof, Mohd, Patrick Thevissen, Steffen Fieuws, et al. “Dental Age Estimation in Malay Children Based on All Permanent Teeth Types.” INTERNATIONAL JOURNAL OF LEGAL MEDICINE 128.2 (2014): 329–333. Print.
APA
Mohd Yusof, M., Thevissen, P., Fieuws, S., & Willems, G. (2014). Dental age estimation in Malay children based on all permanent teeth types. INTERNATIONAL JOURNAL OF LEGAL MEDICINE, 128(2), 329–333.
Chicago author-date
Mohd Yusof, Mohd, Patrick Thevissen, Steffen Fieuws, and Guy Willems. 2014. “Dental Age Estimation in Malay Children Based on All Permanent Teeth Types.” International Journal of Legal Medicine 128 (2): 329–333.
Chicago author-date (all authors)
Mohd Yusof, Mohd, Patrick Thevissen, Steffen Fieuws, and Guy Willems. 2014. “Dental Age Estimation in Malay Children Based on All Permanent Teeth Types.” International Journal of Legal Medicine 128 (2): 329–333.
Vancouver
1.
Mohd Yusof M, Thevissen P, Fieuws S, Willems G. Dental age estimation in Malay children based on all permanent teeth types. INTERNATIONAL JOURNAL OF LEGAL MEDICINE. 2014;128(2):329–33.
IEEE
[1]
M. Mohd Yusof, P. Thevissen, S. Fieuws, and G. Willems, “Dental age estimation in Malay children based on all permanent teeth types,” INTERNATIONAL JOURNAL OF LEGAL MEDICINE, vol. 128, no. 2, pp. 329–333, 2014.
@article{5707618,
  abstract     = {The applicability of the Willems et al. model was verified on a collected sample of Malay (Malaysian nationality) children. This sample was split in a reference sample to develop a Malay-specific prediction model based on the Willems et al. method and in a test sample to validate this new developed model. Next, the incorporation of third molars into this model was analyzed. Panoramic radiographs (n = 1,403) of Malay children aged between 4 and 14.99 years (n = 702) and subadults aged between 15 and 23.99 years (n = 701) were collected. The left mandibular seven permanent teeth of the children were scored based on the staging technique described by Demirjian and converted to age using the Willems et al. method. Third molar development of all individuals was staged based on the technique described by Gleiser and Hunt modified by Kohler. Differences between dental age and chronological age were calculated and expressed in mean error (ME), mean absolute error (MAE), and root mean square error (RMSE). The Willems et al. model verified on the collected Malay children overestimated chronological age with a ME around 0.45 year. Small differences in ME, MAE, and RMSE between the verified Malay-specific prediction model and the Willems et al. model were observed. An overall neglected decrease in RMSE was detected adding third molar stages to the developed permanent teeth model.},
  author       = {Mohd Yusof, Mohd and Thevissen, Patrick and Fieuws, Steffen and Willems, Guy},
  issn         = {0937-9827},
  journal      = {INTERNATIONAL JOURNAL OF LEGAL MEDICINE},
  keywords     = {Forensic odontology,Dental age estimation,Malay population,Willems method,Third molars},
  language     = {eng},
  number       = {2},
  pages        = {329--333},
  title        = {Dental age estimation in Malay children based on all permanent teeth types},
  url          = {http://dx.doi.org/10.1007/s00414-013-0825-8},
  volume       = {128},
  year         = {2014},
}

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