Comparative Evaluation Of Stress Distribution On Splinted And Non-Splinted Implant Supported Prosthesis With Different Implant Dimension In Posterior Maxilla: A Finite Element Analysis Study

Abstract

Aim

The aim of this study is comparative evaluation of stresses on splinted and non splinted implant  supported prosthesis with different dimension of implant in posterior maxilla using finite element analysis method

Materials and Method:

The current study involved the meticulous construction of dental implants, abutments, and prosthesis, as well as the application of forces to mimic the clinical conditions with help of finite element analysis.

 Results

 The study found that short and wide implants exhibited higher von Mises strains in all components compared to long, thin implants, particularly under oblique loading. Vertical loading significantly reduced stress across all components. Oblique loading concentrated maximum principal stress on the bone surrounding the implant neck. Splinted crowns demonstrated lower stress levels than separate crowns under both vertical and oblique loads, indicating improved stress distribution. These findings suggest that implant dimensions and restoration design significantly influence stress distribution and bone interaction, with oblique loading posing a critical challenge.

Conclusion : Within the limitations of the study, optimized implant designs exhibit peak strain at the implant-abutment interface, highlighting this area as a critical stress concentration point. Splinted implant restorations demonstrate a reduced rate of stress distribution compared to non-splinted restorations, suggesting improved load sharing and potentially enhanced longevity. Furthermore, angled loading significantly increases moment forces on implants compared to vertical loading, underscoring the importance of considering loading direction in implant design and restoration.