Morse D R, Esposito J V, Schoor R S
Department of Endodontology, Temple University, School of Dentistry, Philadelphia, PA 19140.
Quintessence Int. 1993 May;24(5):329-33.
One aspect of a previous retrospective radiographic study was an examination of diameter and length changes of root canals at various ages. It was found that root canal shrinkage increased with advancing age. In the present follow-up study, a larger population (500 subjects) was used and only mandibular anterior teeth were evaluated. Root canal shrinkage was calculated vertically and horizontally. Measurements taken were tooth length, coronal length, apical length, root canal length, cervical width, midroot width, and apical width. Six age groups were examined: 17 through 29; 30 through 39; 40 through 49; 50 through 59; 60 through 69; and 70 through 79. Root canals showed statistically significantly more shrinkage with advancing age; there were significant changes among all groups. These findings could prove useful in anthropology and forensics and as an aging biomarker.
之前一项回顾性影像学研究的一个方面是检查不同年龄阶段根管的直径和长度变化。研究发现，根管收缩随着年龄增长而增加。在目前的随访研究中，使用了更大的样本量（500名受试者），并且仅评估下颌前牙。垂直和水平计算根管收缩。测量的指标包括牙长、冠部长度、根尖长度、根管长度、颈部宽度、牙根中部宽度和根尖宽度。检查了六个年龄组：17至29岁；30至39岁；40至49岁；50至59岁；60至69岁；以及70至79岁。随着年龄增长，根管收缩在统计学上显著增加；所有组之间均有显著变化。这些发现可能在人类学和法医学中有用，并且可作为一种衰老生物标志物。
