Comparación de dos métodos radiológicos para evaluación de densidad ósea en mujeres posmenopáusica / Comparison of two radiological methods for evaluation of bone density in postmenopausal women

Debido a la importancia del diagnóstico precoz de osteoporosis, fue objeto de este estudio realizar la comparación de dos métodos radiológicos convencionales para la evaluación de la densidad ósea en mujeres posmenopáusicas. Fueron seleccionadas imágenes de radiografía panorámica y de radiografía carpal, correspondiente a 68 pacientes de sexo femenino, con edades comprendidas entre los 49 y 80 años de edad, realizadas en la Clínica de Radiología Odontológica, para evaluación previa a la colocación de implantes. Para la interpretación de la densidad ósea en la mandíbula a través de las radiografías panorámicas fue utilizado el método del espesor cortical mandibular (PMI). Para la evaluación de las imágenes radiológicas obtenidas por la radiografía carpal, fue aplicado el método de la radiogrametría. Se concluye que existe correlación entre la presencia de una baja densidad ósea a nivel mandibular observada en la radiografía panorámica en las pacientes de la muestra, con la baja densidad ósea presentada en la radiografía carpal.

Due the importance of diagnosis precocious of osteoporosis, this study carried out the comparison of two conventional radiological methods for the evaluation of bone density in postmenopausal women. X-ray images of panoramic and carpal were selected, corresponding to 68 women between 49 and 80 years old, obtained at the Clinic of Dental Radiology, for holding dental implant. The interpretation of bone density in jaw on panoramic radiography was the method to determine mandibular cortical thickness. The carpal radiography was evaluated for the radiogrammetry method. It was concluded that there was a correlation between low bone density observed in the mandibular panoramic radiography with low bone density on carpal radiography.

Assessing mandibular bone mineral density with morphometric analysis / 第二军医大学学报

Objective: To determine the effectiveness and validity of morphometric analysis made from dental panoramic tomograms (DPTs) for predicting mandibular bone mineral density (BMD) while taking the result of dual energy X-ray absorptiometry (DXA) as gold standard. Methods: Twenty healthy subjects (8 male, 12 female) with intact dentition, aged from 11-26 years old, were included in the present study. The BMD of each patient was measured at the lumbar spine (L1 -L4,) by DXA; the results were obtained based on the density of surface (g/cm2). Dental panoramic radiography was carried out using dental panoramic tomography (RTG230/ ENR, made in Italy). Mandibular cortical thickness (MCT) and panoramic mandibular index (PMI) values were calculated and their relationship with DXA measurements were subjected to correlation analysis. The validity of MCT and PMI measurements were assessed by sensitivity and specificity. Results: We found mandibular BMD was positively correlated with MCT (r=0. 268, P<0. 05) and PMI (r=0. 251 3, P<0. 05). The sensitivity, specificity and Youden index of MCT were 50%, 93. 75%, and 0. 437 5, respectively; the numbers of PMI were 50%, 87. 50%, and 0.375, respectively. Conclusion: MCT and PMI might be potential indicators for mandibular BMD; they are simple and applicable in clinic.

Assessing mandibular bone mineral density with morphometric analysis / 第二军医大学学报

Objective:To determine the effectiveness and validity of morphometric analysis made from dental panoramic tomograms(DPTs) for predicting mandibular bone mineral density(BMD) while taking the result of dual energy X-ray absorptiometry(DXA) as gold standard.Methods: Twenty healthy subjects(8 male,12 female) with intact dentition,aged from 1126 years old,were included in the present study.The BMD of each patient was measured at the lumbar spine(L1-L4) by DXA;the results were obtained based on the density of surface(g/cm2).Dental panoramic radiography was carried out using dental panoramic tomography(RTG230/ENR,made in Italy).Mandibular cortical thickness(MCT) and panoramic mandibular index(PMI) values were calculated and their relationship with DXA measurements were subjected to correlation analysis.The validity of MCT and PMI measurements were assessed by sensitivity and specificity.Results: We found mandibular BMD was positively correlated with MCT(r=0.268,P