55 research outputs found
Survival Rate, Fracture Strength and Failure Mode of Ceramic Implant Abutments After Chewing Simulation
The aim of this study was to compare titanium-reinforced ZrO2 and pure Al2O3 abutments regarding their outcome after chewing simulation and static loading. Forty-eight standard diameter implants with an external hexagon were divided into three groups of 16 implants each and restored with three different types of abutments (group A: ZrO2 abutments with titanium inserts; group B: densely sintered high-purity Al2O3 abutments; group C: titanium abutments). All abutments were fixated on the implants with gold-alloy screws at 32 Ncm torque, and metal crowns were adhesively cemented onto the abutments. The specimens were exposed to 1.2 million cycles in a chewing simulator. Surviving specimens were subsequently loaded until fracture in a static testing device. Fracture loads (N) and fracture modes were recorded. A Wilcoxon Rank test to compare fracture loads among the 3 groups and a Fisher exact test to detect group differences in fracture modes were used for statistical evaluation (
Fracture of abutment screw supporting a cemented implant-retained prosthesis with external hexagon connection: a case report with sem evaluation
Abutment Rotational Displacement of External Hexagon Implant System Under Lateral Cyclic Loading
Spline? Implant Prospective Multicenter Study: Interim Report on Prosthetic Screw Stability in Partially Edentulous Patients
In vitro integrity of implant external hexagon after application of surgical placement torque simulating implant locking
Connecting accuracy of interchanged prosthetic abutments to different dental implants using scanning electron microscopy
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