Differences in distances between maxillary posterior root apices and the sinus floor according to skeletal pattern
Differences in distances between maxillary posterior root apices and the sinus floor according to skeletal pattern
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DOI：
10.1016/j.ajodo.2017.05.021
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发表时间：
2017-12-01
影响因子：
3
通讯作者：
Park, Hyo-Sang
中科院分区：
文献类型：
--
作者：
Nguyen-Lan Ahn;Park, Hyo-Sang
简介：本研究的目的是利用锥束计算机断层扫描图像评估上颌后牙根尖到上颌窦下壁的距离，以及牙根与上颌窦之间根据年龄、性别和骨骼类型的关系。方法：对118例10 ~ 28岁的患者（男63例，女55例）进行各根的三维图像检查，并沿真垂直轴测量根尖至窦底的距离。采用比较均值统计检验来评估按年龄、性别和骨骼模式分类的组间差异。结果：牙根与窦底接触的频率由第二前磨牙的70%增加到第一、第二磨牙颊根的80%以上。男性和年龄较大（20-28岁）组的根向窦内突出的距离明显小于女性和年龄较小（10-20岁）组。在腭面超发散、下斜、大角组中，根向窦内突出较多或距离较短。结论：男性、老年、骨型超发散、角大组上颌牙根尖与窦底距离较近或上颌牙根向窦内突出较多。在这些情况下，上颌磨牙的侵入可能是困难和缓慢的，因为上颌窦是充气的。
Introduction: The aim of this study was to evaluate the distances from the maxillary posterior root apices to the inferior wall of the maxillary sinus using cone-beam computed tomography images and the relationships between roots and maxillary sinus according to age, sex, and skeletal pattern. Methods: Three-dimensional images of each root were checked, and the distances were measured along the true vertical axis from the apex of the root to the sinus floor in 118 patients (63 male, 55 female) aged 10 to 28 years. Compare-means statistic tests were done to assess the differences between groups classified according to age, sex, and skeletal pattern. Results: The frequency of root contact with the sinus floor increased from 70% at the second premolar to more than 80% at the buccal roots of the first and second molars. Male and older age (20-28 years) groups had significantly smaller distances or more protrusion of the root into the sinus than female and younger age (10-20 years) groups. The distances were shorter, or there was more protrusion of the root into the sinus in the hyperdivergent, down-canted palatal plane, and large gonial angle groups. Conclusions: Male, older age, hyperdivergent skeletal pattern, and large gonial angle groups had significantly closer distances between maxillary root tips and the sinus floor or more protrusion of the roots into the sinus. The intrusion of the maxillary molars in those situations may be difficult and slow because of the pneumatized maxillary sinus.