Jia Xiao-shi, Zhang Qiu-xia, Xu Meng-jie, Wang Meng, Zhang Peng
Key Laboratory of Oral Medicine, School and Hospital of Stomatology, Guangzhou Medical University. Guangzhou 510140, Guangdong Province; China. E-mail:
Shanghai Kou Qiang Yi Xue. 2015 Apr;24(2):199-205.
To investigate the labial and palatal bone thickness of the maxillary anterior teeth in normal young adults on different reference lines, in order to provide references for clinical treatment.
Sixty-seven eligible Han nationality young volunteers were scanned by cone-beam computed tomography (CBCT). The labial and palatal bone thickness and the labial bone morphology of the anterior teeth were measured after reconstruction. Paired-sample t test, independent- sample t test, one-way ANOVA and Chi-square test were performed using SPSS17.0 software package.
(1)The mean labial bone thicknesses at L1 of canines and L5 of all anterior teeth were more than 1.00 mm, while the thickness of the other labial measurement sites were less than 1.00 mm. The mean palatal bone thickness was more than 1.00 mm. (2) The labial bone was thinner than the palatal bone (P<0.001). (3)The labial bone was the thinnest at L3 and L4 of the anterior teeth (P<0.001). The thickness of palatal bone gradually increased from the L1 to L5(P<0.001). (4)The frequency of the labial bone thinner than 1.00 mm was less than 50% at L2 of canines and L5 of all anterior teeth; The frequency of the labial bone deficiency at L3 and L4 of lateral incisors and L4 of canines was more than 50% in males. (5)The mean buccal bony curvature of canines was larger than that of incisors in males. The distance between root apex and the deepest point of buccal bony curvature was the largest in maxillary central incisors zone in males, while there was no significant difference in females.
The alveolar bone thickness of the maxillary anterior teeth in normal young adults are quite thin or even deficient, and there is diversity of the thickness and morphology between labial and palatal bone.
研究正常青年成人上颌前牙在不同参考线上的唇侧和腭侧骨厚度，为临床治疗提供参考。
对67名符合条件的汉族青年志愿者进行锥形束计算机断层扫描（CBCT）。重建后测量前牙的唇侧和腭侧骨厚度以及唇侧骨形态。使用SPSS17.0软件包进行配对样本t检验、独立样本t检验、单因素方差分析和卡方检验。
（1）尖牙L1和所有前牙L5处的平均唇侧骨厚度大于1.00mm，而其他唇侧测量部位的厚度小于1.00mm。平均腭侧骨厚度大于1.00mm。（2）唇侧骨比腭侧骨薄（P<0.001）。（3）前牙L3和L4处的唇侧骨最薄（P<0.001）。腭侧骨厚度从L1到L5逐渐增加（P<0.001）。（4）尖牙L2和所有前牙L5处唇侧骨厚度小于1.00mm 的频率低于50%；男性侧切牙L3和L4以及尖牙L4处唇侧骨缺损的频率超过50%。（5）男性尖牙的平均颊侧骨曲率大于切牙。男性上颌中切牙区根尖与颊侧骨曲率最深点之间的距离最大，而女性无显著差异。
正常青年成人上颌前牙的牙槽骨厚度相当薄甚至不足，唇侧和腭侧骨在厚度和形态上存在差异。
