Comportamiento de la superficie de implantes Straumann SLActive® y SLA® en el hueso de la tibia del conejo neozelandés

Abstract

La superficie rugosa SLA® (Sand-balsted, Large-grit, Acid-etched) ha demostrado tener una buena osteontegración. Sin embargo se ha demostrado que las superficies químicamente modificadas pueden mejorar los valores de porcentaje de contacto hueso implante BIC. El aumento de humectancia y la energía libre superficial ha mostrado influir positivamente en la neoformación de tejido óseo. El objetivo del estudio es evaluar la osteointegración de los implantes con superficie SLA® y SLActive® con una topografía idéntica, pero propiedades químicas superficiales diferentes...

The implant surface has been recognized to be a critical factor for the achievement of osseointegartion. The most important surface properties are topography, chemistry, surface charge and wettability. Surface properties affect processes such as protein adsorption, cell-surface intercaction, and cell/tissue development at the interface between the body and the biomatrial, all of which are relevant to the functionality of the device. In the past 20 years, the topography of titanium surfaces has been investigated for dental implant applications. The SLA surface (sandblasted and acid-etched) demonstrate enhanced bone apposition in histomorphometric studies and higher removal torque values in biomechanical testing. Based on these experimental results, clinical studies were initiated to load SLA implants after a reduced healing period of only 6 weeks. The clinical examination up to three years demonstrted favorable results, with success rates around 99%. Beside surface topography, surface chemistry is another key variable for peri-implant bone apposition, since it influences surface charge and wettability. Surface wettability is dependent on surface energy and influences the degree of contact with the physiologic enviroment. Increased wettability and surface free energy, both have a positive influence on bone apposition...