Anil A, Peker T, Turgut H B, Pelin C, Gülekon N
Department of Anatomy, Gazi University, Faculty of Medicine, Ankara, Turkey.
J Craniomaxillofac Surg. 2000 Aug;28(4):217-23. doi: 10.1054/jcms.2000.0142.
The zygoma may sometimes be divided into two parts by either a horizontal or a vertical suture. Such a bipartite bone has been given the name of os japonicum as it has been mostly observed in Japanese.
In this study 1266 zygomatic bones in 633 Anatolian dry skulls and 1348 zygomatic bones in 674 plain cranium radiographs of adult patients have been examined.
Os japonicum was present in 2.2% of female and 1.7% of male subjects. All of the 24 multipartite bones observed in the study were bipartite except one. In addition, of 690 female zygomatic bones examined radiologically 15 (2.2%), and 658 male bones 12 (1.8%) were bipartite or tripartite, a total of 674 plain cranium radiographs.
The results were compared with those of other populations. As a result evaluation of both dry skulls and plain radiographs as a single sample, our results were again closely similar to Main Island Japan and other East Asia groups.
颧骨有时可能会被一条水平或垂直的缝线分为两部分。这种二分骨被命名为日本骨（os japonicum），因为它大多在日本人中被观察到。
在本研究中，对633个安纳托利亚干燥头骨中的1266块颧骨以及674名成年患者的普通颅骨X光片中的1348块颧骨进行了检查。
日本骨在2.2%的女性和1.7%的男性受试者中存在。在该研究中观察到的24块多部分骨中，除一块外其余均为二分骨。此外，在674张普通颅骨X光片中，经放射学检查的690块女性颧骨中有15块（2.2%）、658块男性颧骨中有12块（1.8%）为二分或三分骨。
将结果与其他人群的结果进行了比较。作为对干燥头骨和普通X光片作为单一样本的结果评估，我们的结果再次与日本本岛和其他东亚群体的结果非常相似。
