Radiographic dental age estimation applying and comparing Demirjian's seven (1973) and four (1976) teeth methods

Rafael Cidade, Marcelo Dos Santos, Thaís Cássia Alves, Juliano Martins Bueno, Mariana Soares, Mariana Arakelyan, José Luiz Cintra Junqueira, Ademir Franco (Lead / Corresponding author)

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1 Citation (Scopus)


To apply Demirjian's seven (1973, D7) and four (1976, D4) teeth methods in a sample of Brazilian children and compare their performances for age estimation. Panoramic radiographs of 1200 children (600 females and 600 males) were collected from Southeast Brazil. The children were equally distributed (n = 60 females and 60 males) between age intervals of 1 year between 6 and 15.9 (mean age = 10.9; standard deviation [SD]: 2.9) years. D7 and D4 dental age estimation methods were applied by two observers and were compared based on their error rates (error = estimated age-chronological age). Both methods overestimated the chronological age (p < 0.0001). D7 led to overestimations of 0.71 (p < 0.0001) in females and 0.83 (p < 0.0001) in males, while the overestimations with D4 were 0.14 (p = 0.0067) and 0.73 (p < 0.0001) for females and males, respectively. The mean age estimated by D7 was 11.7 (SD: 3.1) years, while for D4, it was 11.3 (SD: 3.3) years. Intra- and interobserver agreement was ≥ 0.98. D4 optimized the performance of radiographic dental age estimation compared to D7. Improvements were reflected in the total sample and separately for female and male children from Southeast Brazil.

Original languageEnglish
Pages (from-to)175–183
Number of pages9
JournalForensic Science, Medicine, and Pathology
Early online date20 Feb 2023
Publication statusPublished - Jun 2023


  • Age
  • Forensic dentistry
  • Growth and development
  • Radiology
  • Teeth


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