抄録
Evaluation of jawbone quality and quantity is very important for successful implant treatment. Especially, computed tomography is very useful in pretreatment examination.
The purpose of this study was to evaluate bone mineral densities (BMD) in mandibular unilateral free end saddle patients, with quantitative computed tomography (QCT). Trabecular and cortical BMD of 14 patients (7 males and 7 females), of ages 40 to 60 years, were measured using QCT (CT numbers ＜ 500 HU:trabecular bone, CT numbers＞500 HU:cortical bone). The statistical difference between two groups was estimated using a 2-sample t-test.
The obtained results were as follows.
1. Trabecular BMD of the defect site was significantly higher than trabecular BMD of the no defect site.
2. No significant difference was seen between cortical BMD of the defect and no defect sites.
3. Male trabecular BMD was significantly higher than female trabecular BMD.
4. No significant difference was seen between male cortical BMD and female cortical BMD.
Conclusively, it would be important to consider these tendencies of mandibular BMD in important treatment.
