Effect of implant tilt and trans-mucosal abutment angulation as influencing stress pattern: An FEA study

TL;DR

This study uses computer modeling to show how implant tilt and abutment angulation affect stress around dental implants, finding that mismatched angles increase stress and could reduce success.

Contribution

The novel contribution is the systematic FEA analysis of how implant tilt and abutment angulation interact to influence stress patterns in tilted dental implants.

Findings

Matched implant and abutment angulations result in more uniform stress distribution.

Angular mismatches greater than 5° significantly increase stress in abutments and crestal bone.

Implant tilts beyond 30° with mismatched abutments may compromise biomechanical stability.

Abstract

The effect of implant tilt and transmucosal abutment angulation on stress distribution around tilted dental implants in a simulated
maxillary arch using Finite Element Analysis (FEA). Eight 3D models with varying implant tilts (17°, 25°, 30°, 35°) and
abutment angulations (17°, 30°) were analyzed under a 200 N vertical load. Matched angulations (e.g., 17°/17°,
30°/30°) showed more uniform and favorable stress distribution. Angular mismatches greater than 5° significantly increase
stress in abutments and crestal bone. Implant tilts beyond 30° combined with mismatched abutments may compromise biomechanical
stability and prosthetic success.