Azaz B, Michaeli Y, Nitzan D
Oral Surg Oral Med Oral Pathol. 1977 Apr;43(4):572-8. doi: 10.1016/0030-4220(77)90110-4.
In order to examine the aging of dentin and cementum, seventy-two impacted human canines, nonfunctional and not affected by external factors, such as attrition, abrasion, caries, etc., were surgically extracted. Ground sections were prepared and the areas of sclerotic dentin and cementum were measured with the aid of a planimeter and expressed as a percentage of the total root area. It was found that there is a significant increase in sclerotic dentin and apposition of cementum with an increase in age.
为了研究牙本质和牙骨质的老化情况，通过外科手术拔除了72颗未萌出的人类犬齿，这些牙齿无功能且未受诸如磨耗、磨损、龋齿等外部因素影响。制备了磨片，并借助求积仪测量了硬化牙本质和牙骨质的面积，以占牙根总面积的百分比表示。结果发现，随着年龄的增长，硬化牙本质和牙骨质的沉积显著增加。
