some researchers have tried pulp/tooth volume for age assessment.

1. F. Yang et al. Dental age estimation through volume matching of

teeth imaged by cone-beam CT

Forensic Science International 159S (2006) S78–S83

2. Jagannathan et al. AGE ESTIMATION IN AN INDIAN POPULATION USING

PULP/TOOTH VOLUME RATIO OF MANDIBULAR CANINES

OBTAINED FROM CONE BEAM COMPUTED TOMOGRAPHY

J Forensic Odontostomatol 2011;29:1:1-6

Kindly check following articles

• Evaluation of number of roots and root anatomy of permanent mandibular third molars in a Korean population, using cone-beam computed tomography. Eur J Dent.2013;7(3):296-301.
• Orhan K, Ozer L, Orhan AI, Dogan S, Paksoy CS. Radiographic evaluation of third molar development in relation to chronological age among Turkish children and youth. Forensic Sci Int. 2007;165:46–51.
• Meinl A, Tangl S, Huber C, Maurer B, Watzek G. The chronology of third molar mineralization in the Austrian populationL: A contribution to forensic age estimation. Forensic Sci Int. 2007;169:161–7.
• Gunst K, Mesotten K, Carbonez A, Willems G. Third molar root development in relation to chronological age: a large sample sized retrospective study. Forensic Sci Int. 2003;136:52–7.
• Age estimation by using dental radiographs. Journal of Forensic Dental Sciences 2013;5(2):118-122.

Thanks Alok