Uchida Y, Goto M, Katsuki T, Akiyoshi T
Saga Medical School, Nabeshima, Saga, Japan.
J Oral Maxillofac Surg. 2001 Oct;59(10):1193-8. doi: 10.1053/joms.2001.26725.
This study used maxillary and zygomatic measurements to obtain information for installing zygomatic implants.
Angular and linear distances between the maxilla and the zygoma were measured in 12 cadavers (n = 22 sides) classified into short and tall groups by height (140 to 159 cm and 160 to 180 cm, respectively).
Based on mean and standard deviation values, the installation angle of zygomatic implants was between 43.8 degrees and 50.6 degrees. The distance between the crest of the maxillary alveolar process near the palate and the jugale (Ju) point of the zygoma was between 44.3 and 54.3 mm. The minimum distance between the most lateral corner of the maxillary sinus and the Ju point was 6.41 mm, and the minimum anteroposterior length of the zygoma was 5.68 mm in the shorter group.
When the installation angle of zygomatic implants is 43.8 degrees or less, perforation of the maxilla and the zygoma or the infratemporal fossa must be avoided. When the angle is 50.6 degrees or more, perforation of the orbital floor must be avoided. Special attention is needed to ensure osseointegration in shorter patients, because the distance between the most lateral corner of the antrum supporting the zygomatic implant and the Ju point is 10 mm or less. The apex of the implant is 3.75 mm in diameter, and the thickness of the zygoma must be 5.75 mm or more. The threads of the implant must not be exposed from the zygoma in shorter patients.
本研究采用上颌骨和颧骨测量数据来获取有关植入颧骨种植体的信息。
对12具尸体（n = 22侧）进行上颌骨与颧骨之间的角度和线性距离测量，这些尸体按身高分为矮组和高组（分别为140至159厘米和160至180厘米）。
根据均值和标准差数值，颧骨种植体的植入角度在43.8度至50.6度之间。靠近腭部的上颌牙槽嵴顶与颧骨颧突点（Ju点）之间的距离在44.3至54.3毫米之间。在较矮组中，上颌窦最外侧角与Ju点之间的最小距离为6.41毫米，颧骨的最小前后长度为5.68毫米。
当颧骨种植体的植入角度为43.8度或更小 时，必须避免上颌骨和颧骨或颞下窝穿孔。当角度为50.6度或更大时，必须避免眶底穿孔。对于较矮的患者，需要特别注意确保骨结合，因为支撑颧骨种植体的窦腔最外侧角与Ju点之间的距离为10毫米或更小。种植体顶端直径为3.75毫米，颧骨厚度必须为5.75毫米或更大。在较矮的患者中，种植体螺纹不得从颧骨露出。
