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Palatal bone density in adult subjects: implications for mini-implant placement
Sung Hee Moon1, Sun Hyung Park, Won Hee Lim
1Graduate School of Clinical Dentistry, Ewha Womans University, Seoul, Korea.
Objectives:
To evaluate palatal bone density to allow for better selection of palatal implant anchorage sites.
Materials And Methods:
Computed tomographic (CT) images were obtained from 15 males and 15 females (mean age, 27 years; range, 23-35 years). Bone density was measured in Hounsfield units (HU) at 80 coordinates at regular mediolateral and anteroposterior intervals along the midpalatal suture.
Results:
Bone densities ranged from 805 to 1247 HU. A significant difference between male and female groups was noted, although no difference was found between left and right sides of individual palates. Palatal bone densities showed a tendency to decrease laterally and posteriorly. The midpalatal area within 3 mm of the midsagittal suture had the densest bone in the entire palate.
Conclusion:
Results suggest that mini-implants for orthodontic anchorage may be effectively placed in most areas with bone density equivalent to the palatal area if they are placed from 3 mm posterior to the incisive foramen and 1 to 5 mm to the paramedian side.
