Survival Rate and Deformation of External Hexagon Implants with One-Piece Zirconia Crowns

This study aimed to evaluate the survival rates of several external hexagon implants directly connected zirconia crowns after thermomechanical fatigue. The deformation hexagons and integrity were also evaluated. A monolithic crown (Y-TZP) four different dental (n = 10, N 40) mounted together embedded in polyurethane. specimens subjected cycling for 2.5 × 106 cycles, at 3.0 Hz frequency, 200 loading. interface implant/zirconia system, before cycling, implant surface evaluated under stereomicroscopy SEM. nanohardness analysis was performed verify hardness implants. Statistical using Kaplan-Meier test, Multi-Sample Survival Tests, Logrank Test, (p 0.05). data did not show significant differences groups. However, some presented fractures (16.67%) region plastic deformations (100%). During chewing simulation, between titanium abutment can promote metal defects ceramic. In addition, types be affected by design.