Quantification of gray values corresponding to bone density using dental cone-beam computed tomography

Cone-beam computed tomography （CBCT） is frequently used for preoperative examination of implants; however, it cannot be to determine the bone mineral density （BMD） owing its incapability at providing CT values obtained through a scan. An efficient and accurate technique measuring BMD using quantitative （QCT）. Herein, we examined whether jaw content can easily estimated from CBCT gray value by applying QCT method. Two systems, 3DX multi-image microCT （3DX） KaVo 3D eXam （KaVo）, were used. Three dry human skull bones with calibration phantoms on skin side target phantom intraoral For 3DX, X-ray tube voltage was altered investigate effect exposure conditions grey value. The （calcium carbonate density） generate conversion curve estimate phantom, subsequently, error true calculated. Errors in range approximately 5％-15％ 3％-4％ KaVo, respectively. which has wider irradiation field, yielded better results than 3DX. demonstrated smaller errors higher voltages when varied. Although differed depending device, could estimation approximate implant site despite error.