Analysis of fit on implants of chrome cobalt versus titanium frameworks made by cad / cam milling.

Background: This study analyzed the degree of passive and vertical fit achieved in frameworks using either cobalt-chromium (Co-Cr) or titanium (Ti) implant-supported fixed partial dentures ( FPDs) fabricated with a CAD/CAM milling technique.

Material And Methods: 33 3-unit FDPs, 17 of Co-Cr metal alloy (test group) and 16 of Ti (control group), were manufactured with two implants by copy milled technology. Optical microscopy was used to measure passive fit (PF) and vertical fit (VF) in all frameworks.

retention capacity of two overdenture attachment systems: Locator® and Equator®.

Background: It is necessary to know the behavior of different attachment systems to be used clinically. The evolution of retention capacity over 10 years (14,600 insertion/de-insertion cycles) was determined , evaluating two overdenture attachment systems (Locator® and OT Equator®).

Material And Methods: The study used an implant replica compatible with the abutments of both systems.

In vitro experimental study of bonding between aluminium oxide ceramics and resin cements.

Unlabelled: To evaluate bond strengths of different resin cements to two aluminum oxide-based ceramics.

Methods: One hundred ten ceramic cylinders were produced and given four different surface treatments. Resin cement cylinders were then bonded to the ceramic cylinders using different resin cements and the bond strength was determined by shear testing to the breaking point.