Stress distribution around osseointegrated implants with different internal-cone connections: photoelastic and finite element analysis.

The goal of this study was to evaluate the distribution of stresses generated around implants with different internal-cone abutments by photoelastic (PA) and finite element analysis (FEA). For FEA, implant and abutments with different internal-cone connections (H- hexagonal and S- solid) were scanned, 3D meshes were modeled and objects were loaded with computer software. Trabecular and cortical bones and photoelastic resin blocks were simulated.

Surface characterization of feldspathic ceramic using ATR FT-IR and ellipsometry after various silanization protocols.

Objectives: This study characterized the feldspathic ceramic surfaces after various silanization protocols.

Methods: Ceramic bars (2 mm × 4 mm × 10 mm) (N = 18) of feldpathic ceramic (VM7, VITA Zahnfabrik) were manufactured and finished. Before silane application, the specimens were ultrasonically cleaned in distilled water for 10 min.

The influence of cutting speed and cutting initiation location in specimen preparation for the microtensile bond strength test.

Purpose: This study evaluated the effect of cutting initiation location and cutting speed on the bond strength between resin cement and feldspathic ceramic.

Materials And Methods: Thirty-six blocks (6.4 x 6.