title: Finite element analysis to compare complete denture and implant-retained overdentures with different attachment systems.
abstract: This finite element analysis compared stress distribution on complete dentures and implant-retained overdentures with different attachment systems. Four models of edentulous mandible were constructed: group A (control), complete denture; group B, overdenture retained by 2 splinted implants with bar-clip system; group C, overdenture retained by 2 unsplinted implants with o'ring system; and group D, overdenture retained by 2 splinted implants with bar-clip and 2 distally placed o'ring system. Evaluation was performed on Ansys software, with 100-N vertical load applied on central incisive teeth. The lowest maximum general stress value (in megapascal) was observed in group A (64.305) followed by groups C (119.006), D (258.650), and B (349.873). The same trend occurred in supporting tissues with the highest stress value for cortical bone. Unsplinted implants associated with the o'ring attachment system showed the lowest maximum stress values among all overdenture groups. Furthermore, o'ring system also improved stress distribution when associated with bar-clip system.
authors: Department of Dental Materials and Prosthodontics, Araçatuba Dental School, Araçatuba, São Paulo, Brazil.
authors: Valentim Adelino Ricardo
authors: VA
authors: Barão
authors: Wirley Gonçalves
authors: WG
authors: Assunção
authors: Lucas Fernando
authors: LF
authors: Tabata
authors: Juliana Aparecida
authors: JA
authors: Delben
authors: Erica Alves
authors: EA
authors: Gomes
authors: Edson Antonio Capello
authors: EA
authors: de Sousa
authors: Eduardo Passos
authors: EP
authors: Rocha
mesh_terms: D019094:Dental Prosthesis, Implant-Supported; D003799:Dental Stress Analysis / Q000379:methods*; D003779:Denture Design; D003781:Denture Retention; D003828:Denture, Overlay; D020342:Finite Element Analysis; D066298:In Vitro Techniques; D007575:Jaw, Edentulous / Q000534:rehabilitation; D008334:Mandible; D008422:Materials Testing