Three-dimensional finite element stress analysis: The technique and methodology of non-linear property simulation and soft tissue loading behavior for different partial denture designs

Abstract

The purpose of this study was to develop and report upon a methodology for a non-linear capacity 3D modeling finite element analysis evaluating the loading behavior of different partial denture designs. A 3D finite element model using human CT data was constructed. An original material constant conversion program was implemented in the data simulation of non-linear tissue behavior. The finite element method material properties of residual ridge mucosa were found to have seven material constants and six conversion points of stress values. Periodontal tissues were found to have three constants, and two conversion points. Three magnetic attachment partial denture designs with different bracing elements were evaluated. Technical procedures for finite element model simulation of nonlinear tissue behavior properties evaluating the oral behavior of prosthetic device designs are reported for prosthodontic testing. The use of horizontal cross-arch bracing positively impacts upon the comparative stability of the partial denture designs tested.

Influence of Implant Position in Implant‐Assisted Removable Partial Denture: A Three‐Dimensional Finite Element Analysis

“…Since the periodontal ligament (PDL) could not be differentiated in the CBCT scan, it was also generated with the SolidWorks software. Thickness ranged from 0.125 to 0.250 mm following a previously published study . In this study this ligament was only assigned to the canine, as it would be the only tooth in direct contact with the PRDP.…”

Determination of oral mucosal Poisson’s ratio and coefficient of friction fromin-vivocontact pressure measurements

“…It is directly linked to the mucosa-denture interaction and stability of a denture (Kanbara et al 2012; Ż mudzki et al 2012a, 2012b). It is important that the denture provides sufficient wettability by forming a superior lubricating layer over the supporting mucosa to reduce friction thereby minimizing patient discomfort (Waters et al 1999).…”

“…In fact, apparent Poisson's ratio (n) of mucosa has not been considered as a critical factor in some literature (Inoue et al 1985). Previous FE studies have assumed a rather broad range of possible values, from 0.30 to 0.49 (Lacoste-Ferré et al 2011;Sawada et al 2011;Kanbara et al 2012;Ż mudzki et al 2012a, 2012bWakabayashi and Suzuki 2013). From a biomechanics perspective, the effect of apparent Poisson's ratio has not been adequately addressed thus far.…”

“…Significant interest has arisen and extensive studies have been undertaken regarding the biomechanical responses of mucosa under denture treatment. Both instant nonlinear elastic responses (Scapino 1967;Kishi 1972;Kydd et al 1974;Kanbara et al 2012) and time-dependent viscous responses (Inoue et al 1985;Lacoste-Ferré et al 2011;Sawada et al 2011;Wakabayashi and Suzuki 2013) of the mucosa have been examined via experimental and numerical approaches. This highly vascularized tissue consists of considerable amount of interstitial fluids, and the substantial fluidic exchange occurs with surrounding tissues under compression (Scapino 1967;Kydd and Daly 1982).…”

“…(a) Masks segmented for individual components from two individual CT scans, patient jaw and denture, presenting mucosa (transparent maroon), cortical bone (transparent yellow), cancellous bone (opaque orange), teeth (opaque grey), denture base (transparent cyan), frame (opaque blue), and artificial crowns (opaque red); (b) solidified model with NURBS representation after visual insertion of the removable partial denture; (c) finite element models meshed in ABAQUS 6.9.2 and (d) loading conditions (orange: native teeth; blue: artificial crowns) and boundary conditions (cyan triangles) assigned to the model.Computer Methods in Biomechanics and BiomedicalEngineering 3 range of n (from 0.30 to 0.49) has been assumed in the literature(Lacoste-Ferré et al 2011;Sawada et al 2011;Kanbara et al 2012;Ż mudzki et al 2012a, 2012bWakabayashi and Suzuki 2013). Soft tissue is often considered to be nearly incompressible by taking a very high Poisson's ratio of 0.499.…”