Análise da superfície e osseointegração de implantes dentários com superfícies biomiméticas contedo Ca, Mg e F

Abstract

Surfaces treatments improve the primary and secondary stability of dental implants. Among surfaces modifications the deposition of ions, such as fluorine, calcium and magnesium has been studied. These ions have low degradation rate in the body environment and great biological interaction with the cells and bone tissue. In the present work, in vitro and in vivo test evaluated the effects of F, Ca and Mg in osseointegration. Implants were inserted into the tibia of rabbits, insertion and removal torque was measured after 2, 4 and 8 weeks. In vivo testing was complemented by measuring the roughness, wettability and surface analysis in scanning electron microscopy. The results were compared with those obtained with implants with the acid treated surface (Porous surface) and fluoride deposition (Porous Nano surface). The results showed that the group treated with fluoride showed better results on the removal torque (17.93 ± 4.47 N.cm) and the surface with Ca and Mg (10,83 + 1,20 N.cm)) showed the lowest bone-interface implant resistance. The higher torque indicates that the addition of fluoride facilitates the mechanisms involved in the dental implant osseointegration and allows the loading of the prosthesis in early time.