Sâmila Gonçalves Barra1, Isadora Pereira Gomes2, Tânia Mara Pimenta Amaral3, Cláudia Borges Brasileiro3, Lucas Guimarães Abreu4, Ricardo Alves Mesquita5. 1. PhD student in Dentistry, Department of Oral Pathology and Surgery, School of Dentistry, Universidade Federal de Minas Gerais, Pampulha, Belo Horizonte/Minas Gerais, Brazil. Electronic address: samilagbarra@gmail.com. 2. MSc student in Dentistry, Department of Oral Pathology and Surgery, School of Dentistry, Universidade Federal de Minas Gerais. 3. Adjunct Professor, Department of Oral Radiology, School of Dentistry, Universidade Federal de Minas Gerais. 4. Adjunct Professor, Department of Pediatric Dentistry and Orthodontics, School of Dentistry, Universidade Federal de Minas Gerais. 5. Professor, Department of Oral Pathology and Surgery, School of Dentistry, Universidade Federal de Minas Gerais, Pampulha, 31270-010 Belo Horizonte/Minas Gerais, Brazil.
Abstract
OBJECTIVE: The aim of this study was to evaluate new radiomorphometric indices in cone beam computed tomography (CBCT) for assessing bone mineral density (BMD) status in postmenopausal women. STUDY DESIGN: Mandibular inferior cortical bone thickness was evaluated in 48 postmenopausal women in cross-sectional images at 4 sites: (1) symphysis (S): cross-sectional image equidistant from the centers of the right and left mental foramina (MF); (2) anterior (A): 10 mm anterior to the MF; (3) molar (M): 10 mm posterior to the MF; and (4) posterior (P): 25 mm posterior to the MF. Participants underwent dual-energy x-ray absorptiometry and were divided into normal, osteopenia, and osteoporosis groups. In the study, t tests with Bonferroni correction were conducted. Statistical significance was set at P < .017. Receiver operator characteristic (ROC) analyses were performed. RESULTS: Mean S index was significantly lower in osteoporosis than in osteopenia (P = .005). Mean M index was significantly lower in osteopenia (P < .001) and osteoporosis (P = .001) than in normal individuals. Mean P index was significantly lower in osteoporosis than in normal patients (P = .008). ROC values ranged between 0.643 and 0.740. Cortical thicknesses separating normal from abnormal varied from 1.73 mm to 3.37 mm. CONCLUSIONS: M and P indices in CBCT may be useful for identifying low BMD in postmenopausal women.
OBJECTIVE: The aim of this study was to evaluate new radiomorphometric indices in cone beam computed tomography (CBCT) for assessing bone mineral density (BMD) status in postmenopausal women. STUDY DESIGN: Mandibular inferior cortical bone thickness was evaluated in 48 postmenopausal women in cross-sectional images at 4 sites: (1) symphysis (S): cross-sectional image equidistant from the centers of the right and left mental foramina (MF); (2) anterior (A): 10 mm anterior to the MF; (3) molar (M): 10 mm posterior to the MF; and (4) posterior (P): 25 mm posterior to the MF. Participants underwent dual-energy x-ray absorptiometry and were divided into normal, osteopenia, and osteoporosis groups. In the study, t tests with Bonferroni correction were conducted. Statistical significance was set at P < .017. Receiver operator characteristic (ROC) analyses were performed. RESULTS: Mean S index was significantly lower in osteoporosis than in osteopenia (P = .005). Mean M index was significantly lower in osteopenia (P < .001) and osteoporosis (P = .001) than in normal individuals. Mean P index was significantly lower in osteoporosis than in normal patients (P = .008). ROC values ranged between 0.643 and 0.740. Cortical thicknesses separating normal from abnormal varied from 1.73 mm to 3.37 mm. CONCLUSIONS: M and P indices in CBCT may be useful for identifying low BMD in postmenopausal women.