How do differences of dental implants' internal connection systems affect stress distribution?: A 3-dimensional finite element analysis

Abstract

Summary Background/Aim: A factor affecting the success rate of dental implants, which has been used successfully for many years, is the implant-abutment connection system. The purpose of this study was to evaluate the stress distribution of different implant-abutment connection systems under different forces. Material and Methods: This in vitro study included a finite element analysis. In the study, the cylindrical and screwed dental implants available in 3 different diameters from 4 different companies were categorized into 12 different models. Two different scenarios of force application were conducted on each model in this study. In the first scenario, 100 N force and 100 N moment were applied in a vertical direction onto a point considered as the center of each tooth. In the second scenario, a 100 N force and moment were applied at a 45° angle in an oblique direction. Results: As a result of the forces applied to dental implants of different diameters from different companies, octagon implant-abutment connection systems had less stress accumulation than hexagon implant-abutment connection systems. In addition, when stress accumulation ratios were evaluated according to the diameter of the implants used, it was observed that 3 mm diameter implants accumulated more stress in bone than 4 mm diameter implants; there was no significant difference between 4 mm diameter implants and 5 mm diameter implants. Conclusions: Implant-abutment connection system is important for the longevity of implants under the forces. Therefore, this factor should be considered during implant selection.

Comparative analysis of stress distribution in one-piece and two-piece implants with narrow and extra-narrow diameters: A finite element study

“…Lopes and collaborators [37] demonstrated better results for one-piece implants. Our results show that Morse taper implants (two-pieces) produce better results in relation to the dissipation of forces applied in both directions (axial and angled), mainly in the evaluation of the peri-implant region.…”

“…For this reason, a two-piece implant and reduced platform with a Morse taper connection were selected for our comparison. However, authors who compared oneand two-piece (Morse taper connection) implants of the same diameter reported divergent results [5,37]. Wu and collaborators [5] showed favorable results for two-piece implants, while…”

Comparison of stresses in monoblock tilted implants and conventional angled multiunit abutment-implant connection systems in the all-on-four procedure

“…In the biomechanical analysis of dental implants, the finite elemet method (FEM) is frequently used because it reflects the complexity of clinical conditions and has benefits over many analysis methods [ 11 ]. The purpose of this study is to compare the stress and strain values of the monoblock tilted dental implant system with the conventional angled multiunit abutment-implant connection system in the implant parts and surrounding bone using FEM.…”

Comparison of Stresses in Monoblock Tilted Implants and Conventional Angled Multiunit Abutment-implant Connection Systems in the All-on-four Procedure

“…In the biomechanical analysis of dental implants, the nite elemet method (FEM) is frequently used because it re ects the complexity of clinical conditions and has bene ts over many analysis methods [11]. The purpose of this study is to compare the stress and strain values of the monoblock tilted dental implant system with the conventional angled multiunit abutment-implant connection system in the implant parts and surrounding bone using FEM.…”