Abstract:

Objective　To study the bone anatomic structure of the temporal bone region and provide reference in implant sur- gery in this region.Methods　Manual quantitative measurements of the bone structure were performed in 73 skull specimens(38 from male and 35 from female).Results　In the area of 8∶00~11∶00(right ear)and 16~22 mm from center of the external au- ditory canal in the temporal bone region, the minimum bone thickness is as follows: 11∶00:6.77 mm in male,5.18 mm in fe- male; 10∶00:8.60 mm in male,6.77 mm in female; 9∶00:9.85 mm in male,7.30 mm in female; 8∶00:14.50 mm in male, 10.80 mm in female.Conclusion　①In the temporal bone region,the area of 8∶00~11∶00(right ear)and 16~22 mm from cen- ter of the external auditory canal offers sufficient bone for implants. The length of implants should be as follows: 11∶00:4~5 mm in male,3~4 mm in female; 10∶00:4~7 mm inmale,4~5 mm in female; 9∶00:4~8 mm inmale,4~6 mm in female; 8∶00: 4~12 mm inmale,4~8 mm in female.②Towards the external auditory canal and from12∶00 to 11∶00, 10∶00 to 8∶00,the bone became thicker, so,if no ample bone is available in the initial site,the location should be shifted anti-clockwise in right side (clockwise in left side) and closer to the external auditory canal.③The differences between male and female are statistically sig- nificant in the temporal bone region,so they should be treated distinguishingly during the clinical practices.

Key words: anatomy, implant, measurement, bone structure