Efectividad de Tres Métodos de Desobturación Sobre Modelos Réplica
Palabras clave:
endodoncia, retratamiento, desobturación, modelos réplicaResumen
El objetivo fue evaluar la eficacia de remoción del material de obturación y el tiempo empleado para la desobturación con tres métodos diferentes, en modelos réplica. Se utilizaron 24 modelos réplica de premolares inferiores instrumentados con sistema Protaper Gold hasta F4, irrigación NaOCl 2,5% y EDTAC 17%. Obturación termoplastizada sistema Fast Pack Pro. La muestra (n=24) se dividió aleatoriamente en tres grupos experimentales (n=8). Desobturación: Grupo 1: fresas Gates Glidden II/III y limas Hedstroem. Grupo 2: lima Medium sistema Wave One Gold y punta ultrasónica Ultra X, (Eighteeth). Grupo 3: lima Rotate 35/04 y punta ultrasónica R1 Clearsonic, (Helse). Se midió el tiempo de desobturación. Las piezas se radiografiaron con radiovisiógrafo digital RVG 5200 (Carestream), y fueron procesadas con software Image-J. Al analizar cantidad de material de obturación remanente, la prueba de Kruskal-Wallis (p<0,05), mostró diferencias estadísticamente significativas entre grupos 2 y 3. Grupo 1 no mostró diferencias significativas con los otros dos (p>0,05). Al analizar tiempo de desobturación, el test de Kruskal-Wallis no determinó diferencias significativas entre grupos 1 y 2 (p>0,05), el grupo 3 tuvo diferencias estadísticamente significativas con los grupos 1 y 2 (p<0,05). En conclusión, ninguno de los sistemas de desobturación evaluados logró eliminar la totalidad del material de obturación. El que combinó limas rotatorias con punta ultrasónica de retratamiento fue el que mostró mayor efectividad de remoción y demandó menor tiempo de trabajo.
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