Fracture load of complete-arch implant-supported prostheses reinforced with nylon-silica mesh: An in vitro study

Author(s)

Papaiz Goncalves, Fernanda de Cassia ^[1] ; Amaral, Marina ^[2] ; Souto Borges, Alexandre Luiz ^[3] ; Martins Goncalves, Luiz Fernando ^[4] ; de Arruda Paes-Junior, Tarcisio Jose ^[3]

Affiliation

^[1] Inst Aeronaut Technol ITA, Postdoctoral Program, Sao Jose Dos Campos - Brazil

^[2] Univ Taubate UNITAU, Dept Dent, Dent Prostheses, Taubate - Brazil

^[3] Sao Paulo State Univ, UNESP, Inst Sci & Technol, Dept Dent Mat & Prosthodont, Ave Engenheiro Francisco Jose Longo 777, BR-12245000 Sao Jose Dos Campos - Brazil

^[4] Inst Aeronaut Technol ITA, Applicat Lab, Engn, Sao Jose Dos Campos - Brazil

• Document type: Journal article
• Source: JOURNAL OF PROSTHETIC DENTISTRY; v. 119, n. 4, p. 606-610, APR 2018.
• Web of Science Citations: 0

Abstract

Statement of problem. Complete-arch implant-supported prostheses without a framework have a high risk of failure: a straightforward and inexpensive reinforcement material, such as nylon mesh, could improve their longevity. Purpose. The purpose of this in vitro study was to evaluate a nylon-silica mesh compound on the fracture strength of acrylic resin and the fracture load of complete-arch implant-supported prostheses. Material and methods. Twenty-four complete mandibular arch implant-supported prostheses were divided into 2 groups according to cantilever length (molar and premolar) and subdivided into another 2 subgroups according to the presence or absence of reinforcing mesh. The specimens were submitted to a maximum load-to-fracture test in a universal testing machine, with a 100-N load cell, a 2 mm/min crosshead speed, and a spherical metal tip diameter of 4 mm at different points (molar and premolar). These were submitted to 1-way analysis of variance for repeated measurement and the post hoc Tukey multiple comparison test (alpha=.05). Results. The mean maximum load standard deviation for the molar group was 393.4 +/- 95.0 N with reinforcement and 305.4 +/- 76.3 N without reinforcement (P=.02); and for the premolar group was 1083.3 +/- 283.7 N with reinforcement and 605.3 +/- 90.5 N without reinforcement (P=.001). Conclusions. Reinforcement with nylon mesh increased the mean maximum load of implant supported complete-arch prostheses at both cantilever lengths. The cantilever to the premolar (5 mm) presented the highest maximum load values to fracture. (AU)

• FAPESP's process: 11/07334-6 - Influence of a nylon fiber reinforcement in flexural strenght and dimensional alteration of acrylic resins
• Grantee: Tarcisio Jose de Arruda Paes Junior
• Support Opportunities: Regular Research Grants