Singhal Anita, Ramesh V, Balamurali Pd
Department of Oral Pathology and Microbiology, H.P. Government Dental College and Hospital, Shimla - 171 001, India.
J Forensic Dent Sci. 2010 Jan;2(1):18-21. doi: 10.4103/0974-2948.71052.
To correlate dimensions of root transparency and age, and to assess whether transparency is reliable for age estimation of unknown.
50 freshly extracted single rooted permanent teeth from 50 different individuals (27 males and 23 females) were collected and their ground sections of 400 μm were stained with 1% methylene blue. The area of the translucent zone was measured by superimposing a transparent graph paper on the ground section under stereomicroscope. The length of the translucency was measured by using digital vernier caliper.
A strong positive correlation between age and translucency of dentin was noted. The length rather than the area of the translucent zone correlated more with age.
Translucency of the root dentin increases with age and it can be used as a reliable parameter for the age estimation.
关联牙根透明度与年龄的关系，并评估透明度对于未知个体年龄估计是否可靠。
收集50个不同个体（27名男性和23名女性）的50颗新鲜拔除的单根恒牙，将其400μm的磨片用1%亚甲蓝染色。在体视显微镜下，通过在磨片上叠加透明方格纸测量半透明区的面积。使用数字游标卡尺测量半透明区的长度。
观察到牙本质透明度与年龄之间存在强正相关。半透明区的长度而非面积与年龄的相关性更强。
牙根牙本质的透明度随年龄增加，可作为年龄估计的可靠参数。
