Reinforcement effects of fiberglass on telescopic dentures using a three-dimensional finite element analysis and fracture test

Kohji NAGATA; Hidekazu TAKAHASHI; Masahiro ONA; Hiroyasu HOSOMI; Noriyuki WAKABAYASHI; Yoshimasa IGARASHI

doi:10.4012/dmj.28.649

Kohji NAGATA, Hidekazu TAKAHASHI, Masahiro ONA, Hiroyasu HOSOMI, Noriyuki WAKABAYASHI, Yoshimasa IGARASHI

Author information

Kohji NAGATA
Removal Partial Denture Prosthodontics, Department of Masticatory Function Rehabilitation, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University
Hidekazu TAKAHASHI
Advanced Biomaterials, Department of Restorative Sciences, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University
Masahiro ONA
Removal Partial Denture Prosthodontics, Department of Masticatory Function Rehabilitation, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University
Hiroyasu HOSOMI
Removal Partial Denture Prosthodontics, Department of Masticatory Function Rehabilitation, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University
Noriyuki WAKABAYASHI
Removal Partial Denture Prosthodontics, Department of Masticatory Function Rehabilitation, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University
Yoshimasa IGARASHI
Removal Partial Denture Prosthodontics, Department of Masticatory Function Rehabilitation, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University

Keywords: Metal-free telescopic over denture, Fiber-reinforced composite resin, Fracture analysis

JOURNAL FREE ACCESS

2009 Volume 28 Issue 5 Pages 649-656

DOI https://doi.org/10.4012/dmj.28.649

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Abstract

The purpose of this study was to evaluate the reinforcing effect of fiberglass on composite resin retainers of the telescopic dentures. A finite element method was used to assess the effect of the abutment height and the embedment of the fiberglass on the stress distributions of the retainers. The experimental retainers of Poly(methylmethacrylate), composite resin (CR) and the fiber-reinforced composite resin (FRC) were used in the fracture test. The fracture load of the FRC retainers were significantly greater than those of the other retainers. The embedment of the fiberglass reduced the stress at the upper surface of the CR retainers. The fracture origin in the CR retainers was seen on the upper surface, while that of the FRC was at the cervical region near the abutment. These results suggest that the change in the fracture pass by the fiberglass increased the fracture resistance of the CR retainer.

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