Resumo
El tratamiento del maxilar superior edéntulo presenta frecuentemente limitaciones de disponibilidad ósea en el sector posterior. Los procedimientos
de elevación sinusal adquieren una relevancia notoria para su resolución. La utilización de hueso mineral bovino desproteinizado como oseoconductor está ampliamente documentada. El presente estudio de boca dividida comparó en 20 pacientes la formación ósea en senos elevados, utilizando
aleatoriamente, partículas S (0,25-1 mm) vs. partículas L (1-2 mm). El análisis histomorfométrico de las biopsias obtenidas de los sitios a implantar
mostró para el grupo S un 42.6 % de nuevo hueso, 42.5% de tejidos no mineralizados y 14.4 % de partículas. El grupo L exhibió un 47.2%, 38.3% y 13.7%, respectivamente. Al aplicar la prueba de los rangos con signo de Wilcoxon se observó un valor P=0.1454 (signifcación 0,5), no existiendo diferencia estadísticamente signifcativa entre ambos grupos. No existió rotura de membrana atribuible a la osteotomía produciéndose en dos casos durante el decolamiento. La tasa de supervivencia de los implantes fue del 100% en 1 año.
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