抄録
Evaluation of jawbone quality is very important for successful implant treatment; however, a method to evaluate bone quality of the jaw has not been established. Furthermore, at present, bone classifications are relatively rough and subjective methods for pre-operative assessment. This study compared the buccal and the lingual cortical bone mineral densities (BMD), and correlation trabecular BNID and cortical BMD by quantitative computed tomography (QCT).
The subjects were 56 patients with mandibular distal extension defect (20 males, 17 pre-menopausal and 19 post-menopausal women;age range 30 to 79 years). The buccal and lingual cortical BMD and the trabecular BMD were measured by QCT. The difference and the correlation among the three groups were estimated.
The results were as follows.
1. The buccal cortical BMD was significantly higher than the lingual cortical BMD in the male and pre-menopausal group. However, no significant difference was seen between the buccal and the lingual cortical BMD in the post-menopausal group.
2. The buccal cortical BMD correlated well with the trabecular BMD in the male group.
3. The buccal and the lingual cortical BMD did not
correlate with the trabecular BMD in the pre-menopausal group.
4. The buccal cortical BMD correlated significantly with the trabecular BMD in the post-menopausal group.
In conclusion, it is important to consider these tendencies of mandibular BMD in dental implant treatment.
