Comparison of stress distribution between complete denture and implant‐retained overdenture‐2D FEA

Abstract

The aim of this study was to compare the stress distribution induced by posterior functional loads on conventional complete dentures and implant-retained overdentures with different attachment systems using a two-dimentional Finite Element Analysis (FEA-2D). Three models representative of edentulous mandible were constructed on AutoCAD software; Group A (control), a model of edentulous mandible supporting a complete denture; Group B, a model of edentulous mandible supporting an overdenture over two splinted implants connected with the bar-clip system; Group C, a model of edentulous mandible supporting an overdenture over two unsplinted implants with the O-ring system. Evaluation was conducted on Ansys software, with a vertical force of 100 N applied on the mandibular left first molar. When the stress was evaluated in supporting tissues, groups B (51.0 MPa) and C (52.6 MPa) demonstrated higher stress values than group A (10.1 MPa). Within the limits of this study, it may be concluded that the use of an attachment system increased stress values; furthermore, the use of splinted implants associated with the bar-clip attachment system favoured a lower stress distribution over the supporting tissue than the unsplinted implants with an O-ring abutment to retain the mandibular overdenture.

Effects of posterior ridge resorption and attachment wear on periimplant strain in mandibular two-implant-supported overdentures

“…4 The amount of rotation depends on both the attachment system and the geometric anatomy of the residual ridge. 5,6 Several in vivo, 7 ex vivo, 8 and in vitro [9][10][11][12] studies have reported that the applied load is concentrated on the anterior implants during function. Therefore, most dentists provide maintenance for the anterior implants.…”

The Impact of Distal Cantilever Extension on the Stress Around Four Implants Connected by a Bar Retained Palateless Overdenture (In Vitro Stress Analysis)

“…The union of implants through a bar in an overdenture transmits more stress to the implants than in isolated systems, easing the load on the edge and providing improved support and retention [13].…”

Di̇ş Heki̇mli̇ği̇nde Sonlu Elemanlar Stres Anali̇z Yöntemi̇

“…Ancak; son zamanlarda bazı kapsamlı çalışmalarda kullanılan materyalin çeşitliliği, komp-leksliği ve üç boyutlu morfolojik yapıların varlığı nedeniyle iki boyutlu sonlu eleman analiz yöntemi yetersiz kalmaktadır (Şekil 3). 21,23,24 Şekil 3. Örnek 2 boyutlu sonlu elemanlar analiz modeli 24 …”