The Effectiveness of Adding a Supporting Implant in Stress Distribution of Long Span Fixed Partial Denture (3D Finite Element Analysis)

Abstract

Background. Long span is seen in many clinical situations. Treatmentplanning options of these cases are difficult and may require FPD, RPD or ISP. Each option has its own disadvantages, including mechanical problems, patient comfort and cost. This article will evaluate the stress distribution of a different treatment option, which consists of adding a single sup-porting implant to the FPD by using 3D finite element analysis.Methods. Three models, each consisting of 5 units, were created as follows: 1. Tooth Pontic Pontic Pontic Tooth; 2. Tooth Pontic Implant Pontic Tooth; 3. Tooth Pontic Pontic Implant Tooth. An axial force was applied to the prostheses by using 3D finite element method and stresses were evaluated.Results. The maximum stress was found in the prostheses in all the models; the highest stress values in all the shared components of the models were almost similar. Stress in implants was lower in the second model than the third one.Conclusion. Adding a supporting implant in long-span FPD has no advantages while it has the disadvantages of complicating treatment and the complications that may occur to the implant and surrounding bone.

Number of dental abutments influencing the biomechanical behavior of tooth‒implant-supported fixed partial dentures: A finite element analysis

“…9 , 10 However, these prostheses connect components that are biomechanically distinct since the periodontal ligament around the tooth root is capable of absorbing tensions and minor dental movements, which does not occur with osseointegrated implants. 13 - 15 Thus, studies demonstrating the effect of the number of dental abutments on the biomechanics of tooth‒implant-supported FPD would be helpful for clinicians. 11 …”

“…9,10 However, these prostheses connect components that are biomechanically distinct since the periodontal ligament around the tooth root is capable of absorbing tensions and minor dental movements, which does not occur with osseointegrated implants. [13][14][15] Thus, studies demonstrating the effect of the number of dental abutments on the biomechanics of tooth-implant-supported FPD would be helpful for clinicians. 11 Therefore, this study aimed to evaluate the influence of the number of dental abutments on the biomechanical behavior of tooth-implant-supported FPD by FEA of the prosthesis structures, the supporting bone, and the abutments (tooth and implant).…”

“…9,10 The main peculiarity of these dentures is that their behavior under occlusal loads applied to implants is different from teeth since the periodontal ligament is capable of absorbing tensions and minor dental movements, which does not occur with osseointegrated implants. [13][14][15] Consequently, tooth-implant-supported FPD is not an optimal approach. However, this treatment option is recommended when the clinician faces limitations regarding the anatomical structures, patient's compromised systemic condition, proprioception, financial issues, and/ or patient preferences.…”

Evaluation of strain in mandibular denture-supporting area in three different occlusal schemes during jaw movements

“…3 Researchers have also paid considerable attention to masticatory efficacy, 4 - 6 patient satisfaction 7 , 8 and measurement of forces exerted by artificial teeth during mastication. 9 - 12 Understanding these forces and the distribution scheme of stress on the bone beneath complete dentures are the most important priorities during fabrication of complete dentures.…”