[Anatomical presentation of edentulous sites in the posterior maxillary in cone beam computed tomography].
[Anatomical presentation of edentulous sites in the posterior maxillary in cone beam computed tomography].
复制标题
上颌后牙区缺齿部位的锥形束计算机断层扫描解剖学表现[J].
DOI：
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发表时间：
2016
影响因子：
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通讯作者：
Han Wenli
中科院分区：
文献类型：
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作者：
Ma Lan;Qu Zhe;Z. Xiang;Han Wenli
客观的
本研究旨在通过锥形束计算机断层扫描（CBCT）分析上颌后牙区无牙颌部位的骨解剖结构。
方法
总共获得了 100 张上颌后牙缺失患者的 CBCT X 线照片，样本量为 217 个无牙部位。通过三维重建评估无牙颌的宽度和高度。此外，还评估了上颌窦壁的角度A和形态。
结果
平均骨高为9.53 mm，骨高小于10 mm的部位比例为62.67%（136/217）。平均骨宽度为9.30 mm，超过6 mm的部位比例为91.71%（199/217）。从前磨牙到磨牙区域，骨高度逐渐减小，但骨宽度却呈现相反的趋势。就窦底形态而言，64.52%呈倾斜形态。在角度A中，小于30°的组为10.14%，30°-60°的组为42.40%，大于60°的组为47.47%。
结论
上颌后牙区的大部分无牙颌部位需要抬高上颌窦底以放置牙种植体。因此，建议使用CBCT扫描来评估上颌窦的解剖结构，以制定合理的种植计划。
OBJECTIVE
This study aimed to analyze the bone anatomy of edentulous sites in the posterior maxillary by cone beam computed tomography (CBCT).
METHODS
A total of 100 CBCT radiographs from patients with missing maxillary posterior teeth were obtained, resulting in a sample size of 217 edentulous sites. The width and height of edentulous were assessed by three-dimensional reconstruction. In addition, the angle A and morphology of the maxillary sinus walls were evaluated.
RESULTS
The mean bone height was 9.53 mm, and the percentage of sites than 10 mm was 62.67% (136/217). The mean bone width was 9.30 mm, and the percentage of sites more than 6 mm was 91.71% (199/217). The bone height decreased from premolar to molar areas, but the opposite trend was observed in bone width. Regarding the morphology of the sinus floor, 64.52% exhibited an oblique configuration. In angle A, the group of less than 30° was 10.14%, 30°-60° was 42.40%, and greater than 60° was 47.47%.
CONCLUSION
A high percentage of edentulous sites in the posterior maxillary requires sinus floor elevation to allow the placement of dental implants. Thus, the use of CBCT scans is recommended to evaluate the anatomical structure of the maxillary sinus for reasonable implant planning.