Tooth Coronal Pulp Index as a Tool for Age Estimation in Egyptian Population

El Morsi DA, Rezk HM, Aziza A, El-Sherbiny M
Age estimation from tooth -coronal index (TCI) using dental radiographs based on reduction in the size of the dental pulp cavity with advancing age as a result of secondary dentin deposition, has been presented. The study aimed to assess the accuracy of age estimation from TCI of mandibular premolars and molars (except wisdom teeth) of both sides using panoramic radiographs of known age and sex and to develop regression equations that can be used in the Egyptians. The study was conducted on 234
more » ... as conducted on 234 Egyptian subjects (119 males and 115 females) of known age and sex. The length of tooth crown and that of coronal pulp cavity (in mm) of 845 mandibular premolars and 835 mandibular molars were measured. Then TCI was computed for each tooth and regressed on the real age of the sample. The results reveal that the mean ± SE age of the studied subjects is 25.52 ± 0.84 years (ranges from 8 to 74 years). There is no difference in TCI between both sexes. TCI for premolars is larger than those of molars and it is higher in males than females (27.24 ± 0.077 to 28.51 ± 0.755 in females; 27.26 ± 0.748 to 28.66 ± 0.846 in males); and (24.79 ± 0.763 to 28.44 ± 0.680 in females; 24.81 ± 0.835 to 29.45 ± 0.866 in males) respectively. Also there is highest significant correlation of the 2 nd right premolar TCI with age (p ≤ 0.05). It could be concluded that TCI method of mandibular teeth was found to be the best radiologic; rapid and non -invasive method for age estimation and the regression equations should be applied cautiously for different populations and time periods. These modifications were done by Kilian's method [29] which is based on the evaluation of six markers: the degree of attrition, the secondary dentin, the secondary cementum, the resorption, the transparency and the position of epithelial attachment. However, Kashyap and Koteswara [30]; modified Gustafson's criteria to make it more objective; it is based on the quantitative evaluation of four markers: the abrasion, the secondary dentin, the secondary cementum and the transparency. On the other hand Kvaal et al. [34] introduced a radiographic method in which tooth extraction was not required as it was done by indirectly measuring deposition of secondary dentin (by measuring pulp radiolucency) and correlated it to age. The study of Ikeda et al. [27] measured the tooth-coronal index (TCI) [Tooth -Crown index = Length of the coronal pulp cavity / Length of the Crown X 100] after it was computed for each tooth and regressed on real age. In 1993, Drusini [20] following Ikeda et al. method, soft X-ray photos were taken to measure the length (in mm) of the crown (CL) and the length of coronal pulp cavity (CPCL). Then, the coronal index was computed for each tooth and regressed to obtain equations that allow estimation of age in unknown bodies and isolated teeth [21] .
doi:10.15744/2348-9804.2.501 fatcat:qyn46ag76nerpgprjmbf2yumga