下顎骨の骨量と骨質に対する性差および閉経の影響

抄録

Quantity and quality of the bone where dental implants are installed affect the outcome of the treatment. The purpose of the present study is to clarify the effects of sex differences and menopause on the bone of a partially edentulous molar region of the mandible.
The mandibles of 91 patients, 29 males and 62 females including 38 postmenopausal women, were analyzed with CT scans. The trabecular width (TW), cortical width (CW) and bone mineral density of the trabecular bone (BMD) were obtained.
The results were as follows:
1. Male BMD was higher than female BMD, and the BMD of menopausal women was lower than that of premenopausal women.
2. Female TW was larger than male TW, whereas female CW was smaller than male CW.
3. In all patients, BMD correlated negatively with TW and BMD correlated positively with CW.
4. Among the male patients, BMD correlated with neither TW nor CW.
5. Among the female patients, BMD correlated negatively with TW, whereas BMD correlated positively with CW.
6. In premenopausal women, BMD correlated negatively with TW, whereas BMD did not correlate with CW.
7. In postmenopausal women, BMD correlated with neither TW nor CW.
These results demonstrated that sex differences and the menopausal state affect mandible bone condition as well as the condition of the vertebrae and bones of legs and arms.