Flexural and bond strengths of relined denture polymers assessed by four-point bending tests and Weibull analysis

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Abstract

Objectives: The aim of this study was to (1) investigate the flexural strengths of three denture resins i.e. heat, photopolymerised and microwaved and how it was affected by relining with auto- and visible light-polymerised hard reliners, (2) investigate the bond strengths between denture resins and hard reliners and (3) interpret the results of both tests by utilising Weibull analysis. Materials and methods: Specimens (65 × 10 × 2.5 mm) from denture resins, relined and bonded combinations were tested using a four-point bending test in a universal testing machine and a crosshead speed of 5 mm/min. Ten specimens for each bulk resin and denture resin-reliner combination for a total of 150 were tested. Results: Statistical analysis indicated significant differences between bulk materials (p < 0.001) and between reliners (p < 0.001) for flexural and bond strength tests. Conclusion: It was concluded that (1) the four-point flexural strength was different between the denture base materials, (2) flexure strength between bulk and relined or between relined with autopolymerised and photopolymerised bases was different, (3) flexural strength among relined denture bases was different and (4) bond strengths among relined denture bases were different. © 2011 The Gerodontology Society and John Wiley & Sons A/S.

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Polyzois, G. L., Lagouvardos, P. E., & Frangou, M. J. (2012). Flexural and bond strengths of relined denture polymers assessed by four-point bending tests and Weibull analysis. Gerodontology, 29(2). https://doi.org/10.1111/j.1741-2358.2011.00515.x

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