Comparação do desajuste vertical de infraestruturas metálicas sobre implantes: fundida versus fresada

Abstract

Passive fit of an implant framework is one of the mechanical parameters can affect the longevity of the prosthesis. Several complications in treatment with dental implants may be due to misfit of metallic frameworks and can be aggravated by the absence of periodontal ligament. The objective of this study is to compare the misfit of a one-piece casted and a metallic milled by CAD CAM system implant frameworks. On a master aluminum model were installed four analogues of conical abutments. On these, were fabricated two frameworks: a casted in CoCr and a Ti milled by CAD CAM system. The vertical misfits in the framework analogues interface were measured using an optical microscope. The mean misfit in each of the pillars (45, 43, 33 and 35) and the mean misfit of each framework were measured. In milled framework there was a reduction in the values of vertical misfit in all pillars. The casted framework showed a mean vertical misfit (108.6 ìm) approximately 10 times larger than the milled framework (9.6 ìm).