Bellucci C, Perrini N
Int Endod J. 2002 Jul;35(7):594-606. doi: 10.1046/j.1365-2591.2002.00537.x.
This study aimed to measure the thickness of radicular dentine and cementum in incisors, canines and premolars, and to develop geometric average models.
The roots of 220 extracted human teeth were sectioned in three horizontal parallel planes and measured using an optical microscope. For each cut surface buccal, lingual, mesial, and distal thickness of the root wall was measured. Mean values of the thickness at each location of each cut surface were calculated. The observed differences in thickness by tooth type, location, and section were compared by ANOVA and Student's t-test.
Maxillary central incisors and maxillary canines had the greatest widths. In all teeth with a single root, the wall thickness were greater on the lingual side than the buccal side. Although differences between mesial and distal thicknesses were not statistically significant.
Wall thickness varied greatly. The lingual surfaces of roots were larger. All roots had thin walls in the apical third.
本研究旨在测量切牙、尖牙和前磨牙的牙根牙本质和牙骨质的厚度，并建立几何平均模型。
将220颗拔除的人类牙齿的牙根在三个水平平行平面上进行切片，并使用光学显微镜进行测量。对于每个切割面，测量根壁的颊侧、舌侧、近中侧和远中侧厚度。计算每个切割面每个位置厚度的平均值。通过方差分析和学生t检验比较观察到的不同牙齿类型、位置和切片的厚度差异。
上颌中切牙和上颌尖牙的宽度最大。在所有单根牙中，舌侧的壁厚大于颊侧。尽管近中侧和远中侧厚度之间的差异无统计学意义。
壁厚差异很大。牙根的舌侧表面较大。所有牙根在根尖三分之一处壁薄。
