Evaluación Morfométrica Directa de la Asimetría Condilar sobre Mandíbulas Humanas

La asimetria condilar (AC) es una alteracion morfologica estructural considerada un importante factor de riesgo para los trastornos de la articulacion temporomandibular. Diversas tecnicas evaluan la AC, principalmente basadas en mediciones sobre radiografias panoramicas, dado su amplio uso. Sin embargo, los metodos sobre radiografias no son muy sensibles por la magnificacion, distorsion, superposicion de estructuras y posicionamiento mandibular. El objetivo de este estudio fue determinar los valores reales de los indices de asimetria condilar para una muestra normal con medicion directa sobre mandibulas humanas. Se utilizaron 30 mandibulas humanas adultas secas pertenecientes a poblacion chilena, y la asimetria condilar fue evaluada las tecnicas de Habets y de Kjellberg, y se realizaron los analisis descriptivos de los valores promedios, desviacion estandar, minimo y maximo y los indices de asimetria/simetria de cada metodo. Segun el indice de asimetria condilar de Habets 7 casos (un 23,3%) mostraron valores superiores a un indice de 3% de asimetria, con un rango entre 3,64 y 27,26%. Los parametros morfologicos del lado derecho e izquierdo no mostraron diferencias significativas (p The condylar asymmetry (CA) is a structural morphological alteration considered an important risk factor for temporomandibular joint disorders. CA can be evaluate by various techniques, mainly based on measurements on panoramic radiographs, given their wide use. However, the methods of x-rays are not very sensitive due to the magnification, distortion, overlapping structures and mandibular positioning. The aim of this study was to determine the values of condylar asymmetry for normal sample by direct measurement in human jaws. Thirty adult human dry mandibles belonging to Chilean population were used. The condylar asymmetry was evaluated by Habets and Kjellberg techniques, and descriptive analysis of mean, standard deviation, minimum and maximum values, and asymmetry/symmetry indexes were performed of each method. According to the Habets' index, 7 cases (23.3 percent) showed a higher rate of 3 percent asymmetry, with a range between 3.64 percent and 27.26 percent. The morphological parameters of the right and left side showed no significant differences. According to the symmetry Kjellberg's index, 19 cases (63.3 percent) showed values lower to 93 percent and were classified as asymmetric. The morphological parameters of the right and left side also showed no significant differences (p