Oliveira Matheus Sampaio, Doriguêtto Paulo Victor Teixeira, Sotto-Maior Bruno Salles, Devito Karina Lopes
Gen Dent. 2022 May-Jun;70(3):52-55.
The objective of this retrospective study was to evaluate buccal bone and gingival thickness measurements obtained from cone beam computed tomographic (CBCT) images of maxillary anterior teeth with and without metal posts. A convenience sample of 71 CBCT images of healthy maxillary anterior teeth and 61 CBCT images of maxillary anterior teeth with a metal post were selected from a database. Eight tomographic measurements (4 bone thicknesses and 4 gingival thicknesses) were performed in the parasagittal section of each tooth, perpendicular to the tooth axis. The Mann-Whitney U test was used to compare these thicknesses, and the Spearman correlation coefficient was calculated for correlation of age with sex. Statistically significant differences were observed for almost all measurements (P < 0.05); the CBCT images of teeth with metal posts displayed lower bone thickness values and higher gingival thickness values. No statistically significant correlations were observed between the thickness measurements and age. However, significantly higher bone thickness values were observed in men (P < 0.05). Cone beam computed tomographic images of teeth with metal posts showed differences in mean bone and gingival measurements compared to teeth without metal posts, suggesting a possible interference of metal artifacts.
这项回顾性研究的目的是评估从上颌前牙的锥形束计算机断层扫描（CBCT）图像中获得的颊侧骨厚度和牙龈厚度测量值，这些图像包括有金属桩和无金属桩的情况。从数据库中选取了71例健康上颌前牙的CBCT图像和61例有金属桩的上颌前牙的CBCT图像作为便利样本。在每颗牙齿垂直于牙轴的矢状旁切面上进行八项断层测量（4项骨厚度和4项牙龈厚度）。采用Mann-Whitney U检验比较这些厚度，并计算Spearman相关系数以分析年龄与性别的相关性。几乎所有测量均观察到统计学上的显著差异（P < 0.05）；有金属桩的牙齿的CBCT图像显示出较低的骨厚度值和较高的牙龈厚度值。厚度测量值与年龄之间未观察到统计学上的显著相关性。然而，男性的骨厚度值显著更高（P < 0.05）。与无金属桩的牙齿相比，有金属桩的牙齿的锥形束计算机断层扫描图像显示出平均骨和牙龈测量值的差异，提示金属伪影可能存在干扰。
