Numerical Study of the Effect of Dental Implant Inclination

Abstract

This paper contains the results of a research focused on the determination of the influence of an implant inclination on the strain state throughout the acrylic block with implant. The aim of the presented research is to qualitatively determine the regions with the greatest strain fields on the models. The finite element models of implant and acrylic block are developed for predefined implant inclinations in order to analyze the influence of implant inclination on deformations on the outer surface of acrylic block. The comparative contour plots of stress and strain state of analyzed models, as well as the comparative diagrams with obtained results, are presented. The conclusions about the inclination angle which leads to the higher strains in the block-implant are explained. Obtained results could be applied for the planning of future experimental studies which could utilize this and similar models to determine their load transfer characteristics, and could be included in the planning of dental implant position, and prediction of successful dental therapy.

Investigation of the Effect of Dental Implant Inclination on the Resin Model Using Finite Element Analysis and Digital Image Correlation Method

“…Our results are consistent with previous studies stated that inclined implant negatively affected on stress/strain field [7,9,12]. FEA contour plots and DIC scales for vertical strain indicate remarkably higher strain in the region of the implant neck corresponds to the top of resin block, which was also reported previously [7,11,23]. Resin material used in this study expresses similar physical characteristics compared to cancellous bone especially considering Young modulus (1.3 GPa vs. 1.37 GPa) [24].…”

“…Our results are consistent with previous studies stated that inclined implant negatively affected on stress/strain field [7,9,12]. FEA contour plots and DIC scales for vertical strain indicate remarkably higher strain in the region of the implant neck corresponds to the top of resin block, which was also reported previously [7,11,23].…”

“…Load intensity was applied in accordance with the values for occlusal forces found in the literature [25,26]. An advantage of this study is found in increased number of the inclination angles compared to other reports [7,9,14]. Nonetheless, it was reported that this change in inclination can be noticed following implantation procedure, due to iatrogenic fators [8], while the effects of this factors should be argued.…”

“…Dental implants should be set in vertical position, parallel with axial occlusal loads and orthogonal to the occlusal plane [1][2][3][4]. This is sometimes hard to achieve due to certain limitations in anatomy or histology of supportive tissues [4][5][6][7]. Thus, there are situations where an inclination of dental implants is inevitable and requested.…”

“…Recent reports presented DIC as mighty tool for measuring strain on the PMMA-acrylic block, subjected to axial loading of immersed dental implants [18][19][20]. This study was based on previously published experimental and numerical investigations [7,20,21], however, this paper was conducted employing both, FEA and DIC methods to create critical overview of strain analysis in resin models with different implant angulations. The goal of this work was to find connection between implant inclination and strain of the polyurethane resin block; furthermore, to determine the regions of the highest strain on the models using two methodologies, the Finite Element Analysis (FEA) and the Digital Image Correlation technique (DIC).…”