Relationship between findings of mandibular cortical bone in inferior border and bone mineral densities of lumbar vertebrae in postmenopausal women

Abstract

Summary: It is important to assess the general bone condition in dental implant treatment. The relationships between the bone mineral densities (BMDs) of lumbar vertebrae and mandibular cortical bone condition in the inferior border using multi-slice computed tomography (CT) were assessed in postmenopausal women. If a strong correlation between them is obtained, the mandibular cortical bone condition may be useful to evaluate the general bone condition. Twenty-two postmenopausal women were enrolled in this investigation. The maximum CT value and width of the mandibular cortical bone (MCW-MSCT) were measured, and the mandibular cortical bone index (MCI-MSCT) was classified using multi-slice CT. BMDs of lumbar vertebrae were measured using dual energy X-ray absorptiometry (DXA), and then the percentage of the young adult mean (YAM) was analyzed. The correlations were investigated between the mandibular cortical bone condition and values of lumbar vertebrae. Weak correlations were observed between MCW-MSCT and the percentage of YAM. Also, significant differences in the percentage of YAM were noted between types of MCI-MSCT. The mandibular cortical bone index (MCI-MSCT) in the inferior border using multi-slice CT may be applicable to evaluate the influence of the general bone condition.

Mandibular Cortical Bone Index Using Multi-Slice and Cone-Beam Computed Tomography

“…Also, measurement of the mandibular cortical bone width (MCW) at the inferior border on panoramic radiography was useful for the screening of osteoporosis 16) . A weak correlation was observed between MCW-MSCT using multi-slice CT and the percentage of the young adult mean (YAM) in the lumbar vertebrae 7) . A threshold voxel value must be set in conebeam CT to evaluate MCW; however, voxel values obtained from cone-beam CT are not absolute 17) .…”

“…Correlation coefficients between BMDs of the lumbar vertebrae and values using quantitative ultrasound densitometry ranged from 0.433 to 0.640 10) . In previous studies, the BMD of the third cervical vertebra and MCI-MSCT were proposed to evaluate the influence of the general bone condition in imaging diagnosis for dental implant treatment using multi-slice CT 6,7) . Celenk and Celenk reported that the relationship between the age and CT values of the fifth cervical vertebra was negatively correlated (r = 0.354) in the total subjects, with 68 men and 46 women, using a linear equation (y=-2.06x+485.86) 11) .…”

“…A threshold voxel value must be set in conebeam CT to evaluate MCW; however, voxel values obtained from cone-beam CT are not absolute 17) . MCI-MSCT was classified into two types: homogeneous and osteoporotic types, using multi-slice CT, and significant differences in the percentage of the YAM were noted between the types of MCI-MSCT 7) . MCI-MSCT was classified into the two types in the same way as in a previous study, and a significant difference in the BMD of the third cervical vertebra was noted between the two types.…”

“…The BMD of the third cervical vertebra was proposed to evaluate the influence of the general bone condition. Also, classification of the mandibular cortical bone index (MCI) using multi-slice CT (MSCT) may be applicable to evaluate this general condition 7) .…”

High calcium diet alleviates 5/6 nephrectomy-induced bone deteriorations of lumbar vertebrae in mice

“…The lumbar vertebra is a hypersensitive site that is susceptible to bone injury (33). In clinical practice, kidney transplant recipients have a lower lumbar spine trabecular bone score, which is associated with an increased incidence of fractures (34).…”