Incidence of os japonicum in Anatolian dry skulls and plain cranium radiographs of modern Anatolian population.

INTRODUCTION

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.

MATERIAL

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.

RESULTS

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.

CONCLUSION

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.