Finite element analysis to compare complete denture and implant-retained overdentures with different attachment systems.
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.
Barão
Valentim Adelino Ricardo
VA
Department of Dental Materials and Prosthodontics, Araçatuba Dental School, Araçatuba, São Paulo, Brazil.
Assunção
Wirley Gonçalves
WG
Tabata
Lucas Fernando
LF
Delben
Juliana Aparecida
JA
Gomes
Erica Alves
EA
de Sousa
Edson Antonio Capello
EA
Rocha
Eduardo Passos
EP
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