title: Effect of different mucosa thickness and resiliency on stress distribution of implant-retained overdentures-2D FEA.
abstract: The study aimed to evaluate the effect of different mucosa thickness and resiliency on stress distribution of implant-retained overdentures using a two-dimensional finite element analysis. Models were used in order to simulate two situations. In group A, model represented an edentulous mandible supporting an overdenture retained by two-splinted-implants connected with bar-clip system while in group B, model simulated an edentulous mandible supporting an overdenture retained by two-splinted-implants connected with bar-clip system associated with two-distally placed o'ring system. In each group, mucosa assumed three characteristics of thickness (1, 3 and 5 mm) in the resiliencies: hard, resilient and soft, respectively. Evaluation was performed on Ansys software. Group A showed higher stress values regardless of the mucosa characteristics. Overall, stress decreased at the supporting tissues as mucosa thickness and resiliency increased. Regarding supporting tissues, cortical bone showed the highest stress values. The use of bar-clip attachment system with distally placed o'ring attachment design optimized the stress distribution.
authors.affiliation: Department of Dental Materials and Prosthodontics, Araçatuba Dental School, São Paulo State University (UNESP), São Paulo, Brazil.
authors.forename: Valentim Adelino Ricardo
authors.initials: VA
authors.lastname: Barão
authors.forename: Wirley Gonçalves
authors.initials: WG
authors.lastname: Assunção
authors.forename: Lucas Fernando
authors.initials: LF
authors.lastname: Tabata
authors.forename: Edson Antonio Capello
authors.initials: EA
authors.lastname: de Sousa
authors.forename: Eduardo Passos
authors.initials: EP
authors.lastname: Rocha
mesh_terms: D001696:Biomechanical Phenomena; D015921:Dental Implants; D003828:Denture, Overlay; D020342:Finite Element Analysis; D006801:Humans; D008962:Models, Theoretical; D009061:Mouth Mucosa; D012984:Software; D013314:Stress, Mechanical; D013312:Stress, Physiological
chemical_list: D015921:Dental Implants