Abstract：
This retrospective study assessed maxillary premolar and molar teeth and identified roots with incomplete apical bone coverage using cone beam computed tomography in 161 dogs. The associated dorsal anatomic sites that the roots communicated with were the ventral nasal meatus, maxillary recess, infraorbital canal, and pterygopalatine fossa. The study found that all roots of the maxillary premolar and molar teeth have the potential for incomplete apical bone coverage, with 26.7% having incomplete apical bone coverage. No significant association with sex was found. A significant association with weight was found, and this lowered with increasing body weight. Facial index, as a determinate of skull shape, was found to be significant in only 35.7% of roots in univariate and 14.2% of roots in multivariate modeling. Knowledge of the anatomy of these roots plays an important role in safe and effective extraction techniques, in reducing iatrogenic trauma, and in understanding the potential local effects of periodontal and endodontic disease.
摘要：
这项回顾性研究评估了161只狗的上颌前磨牙和磨牙，并使用锥形束计算机断层扫描确定了根尖骨覆盖不完整的根。与根部相通的相关背侧解剖部位是腹侧鼻道，上颌隐窝,眶下运河,和翼腭窝.研究发现,上颌前磨牙和磨牙的所有牙根都有可能根尖骨覆盖不完全,26.7%的根尖骨覆盖率不完全。没有发现与性别的显著关联。发现与体重有显著关联，这随着体重的增加而降低。面部指数,作为头骨形状的决定，在单变量模型中，仅35.7％的根和14.2％的根被发现是显着的。了解这些根的解剖结构在安全有效的提取技术中起着重要作用，在减少医源性创伤方面，以及了解牙周和牙髓病的潜在局部影响。
