Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2011 Oct;67(4):343-7.
doi: 10.1016/S0377-1237(11)60081-6. Epub 2011 Oct 22.

An evaluation of fracture resistance of interim fixed partial denture fabricated using polymethylmethacrylate and reinforced by different fibres for its optimal placement: an in vitro study

M Viswambaran  1 , Anita Kapri  2 , Dsj D'Souza  3 , Manjit Kumar Retd  4
Affiliations

An evaluation of fracture resistance of interim fixed partial denture fabricated using polymethylmethacrylate and reinforced by different fibres for its optimal placement: an in vitro study

M Viswambaran et al. Med J Armed Forces India. 2011 Oct.

Abstract

Background: Polymethylmethacrylate (PMMA) is the most common material used to fabricate interim fixed partial denture (FPD). Several attempts have been made to improve fracture strength of this material with various methods of reinforcement, but its effect on the fracture resistance of interim FPD was not evaluated.

Method: The study was designed in two stages. In the first stage various methods of reinforcement (glass fibre, polyethylene, combination of glass and polyethylene, and stainless steel) for interim FPD of PMMA were used and its effect on the fracture resistance of interim FPD was evaluated by three point bending test using universal testing machine. In the second stage, fibres which showed the highest fracture resistance value was used to ascertain the most appropriate site of placement for reinforcing interim FPD. Comparisons were made with analysis of variance.

Results: Stainless steel and glass fibres showed significantly higher fracture resistance value than polyethylene alone or mixed with glass fibres (P < 0.001). Fibre placement in the occlusal third region of the pontic resulted in higher fracture resistance than the other locations (P < 0.05).

Conclusion: There was a definite improvement in the fracture resistance after reinforcement with fibres and stainless steel. The occlusal third region of the pontic is the most appropriate site of placement for reinforcement in interim FPD.

Keywords: fibre reinforcement; polymethylmethacrylate.

PubMed Disclaimer

Figures

Figure 1
Figure 1
The three-unit metal fixed partial denture on the master die.
Figure 2
Figure 2
Testing on Instron machine.
Figure 3
Figure 3
Box plot showing comparison of fracture resistance strength in Stage I.
Figure 4
Figure 4
Box plot showing comparison of fracture resistance strength in Stage II.
See this image and copyright information in PMC

References

    1. Bowman AJ, Manley TR. The elimination of breakages in upper dentures by reinforcement with carbon fibre. Br Dent J. 1984;156:87–89. - PubMed
    1. Hamza TA, Rosenstiel S, El-Hosary MM, Ibraheem RM. Fracture resistance of fiber reinforced PMMA Interim fixed partial dentures. J Prosthodont. 2006;15:223–228. - PubMed
    1. Solnit GS. The effect of methyl methacrylate reinforcement with silane treated and untreated glass fibers. J Prosthet Dent. 1991;66:310–314. - PubMed
    1. Vallittu PK. A review of methods used to reinforce polymethyl meth-acrylate resins. J Prosthodont. 1995;4:183–187. - PubMed
    1. Federick DR. The provisional fixed partial denture. J Prosthet Dent. 1975;34:520–524. - PubMed

LinkOut - more resources