exudates and Dentin--Secondary

Topics: Adolescent; Adult; Age Determination by Teeth; Aged; Aged, 80 and over; Dentin, Secondary; Female; Forensic Medicine; Humans; Malaysia; Male; Middle Aged; Multidetector Computed Tomography; Radiography, Panoramic; Young Adult

Forensic odontology plays a vital role in the identification and age estimation of unknown deceased individuals. The purpose of this study is to estimate the chronological age from Cone-Beam Computed Tomography (CBCT) images by measuring the buccal alveolar bone level (ABL) to the cemento-enamel junction and to investigate the possibility of employing the age-related structural changes of teeth as studied by Gustafson. In addition, this study will determine the forensic reliability of employing CBCT images as a technique for dental age estimation. A total of 284 CBCT images of Malays and Chinese patients (150 females and 134 males), aged from 20 years and above were selected, measured and stages of age-related changes were recorded using the i-CAT Vision software. Lower first premolars of both left and right side of the jaw were chosen and the characteristics described by Gustafson, namely attrition, secondary dentine formation and periodontal recession were evaluated. Linear regression analysis was performed for the buccal bone level and the R values obtained were 0.85 and 0.82 for left and right side respectively. Gustafson's characteristics were analysed using multiple regression analysis with chronological age as the dependent variable. The results of the analysis showed R values ranged from 0.44 to 0.62. Therefore it can be safely concluded that the buccal bone level highly correlated with the chronological age and is consequently the most suitable age-related characteristic for forensic age estimation.

Topics: Adult; Age Determination by Teeth; Alveolar Process; Bicuspid; Cementogenesis; Cone-Beam Computed Tomography; Cross-Sectional Studies; Dental Cementum; Dental Enamel; Dentin, Secondary; Female; Gingival Recession; Humans; Linear Models; Malaysia; Male; Middle Aged; Retrospective Studies; Young Adult

One hundred and ninety-eight single-rooted teeth from individuals aged 21-90 yr of Caucasian, Malay, Chinese Malay and Indian Malay origin were studied. Single or serial longitudinal sections of extracted teeth were cut following dye imbibition of patent dentinal tubules. The extent of sclerosis of apical dentinal tubules was assessed and correlated with the age of the individual. Correlation with age was higher in the Caucasian than the Malay races and within the Malaysian racial groups correlation with age was highest in the Malays and lowest in the Chinese. It is concluded that factors other than age may be important in the formation of sclerotic apical dentine in teeth of different racial origin. The effect of racial origin should be considered when using sclerosis as a means of age determination in forensic cases.

Topics: Adult; Age Determination by Teeth; Aged; Aged, 80 and over; Aging; Asian People; Calcinosis; China; Coloring Agents; Dentin; Dentin, Secondary; Forensic Dentistry; Humans; Image Processing, Computer-Assisted; India; Malaysia; Middle Aged; Reproducibility of Results; Tooth Root; White People