title: Some flexural properties of a nylon denture base polymer.
abstract: Nylon denture base material could be a useful alternative to poly (methyl methacrylate) (PMMA) in special circumstances such as patient allergy to the monomer. The aim of this study was to evaluate the flexural properties of a nylon denture base material (Lucitone FRS), a conventional compression-moulded heat-polymerized (Meliodent), a compression-moulded microwave-polymerized (Acron MC) and an injection-moulded microwave-polymerized (Lucitone 199) PMMA polymers. The effect of aldehyde-free, oxygen releasing disinfectant solution (Perform) on these properties was also investigated. The flexural modulus and the flexural strength were assessed with a three-point bending test. Specimens were stored in water at a temperature of 37 degrees C for 30 days. For each material, half of the prepared specimens were randomly selected and immersed in the disinfectant 24 h prior to testing. Results were compared statistically at a confidence level of 95%. The result showed that in both the control and disinfected groups, the flexural modulus of nylon was significantly lower than the three PMMA polymers. The flexural strength of nylon was significantly lower than those of Meliodent and Acron MC but was comparable with Lucitone 199. A 24-h immersion in the disinfecting solution increased the rigidity of nylon denture base material.
authors.affiliation: Department of Prosthetic Dentistry, Faculty of Dentistry, University of Malaya, 50603 Kuala Lumpur, Malaysia. norsiah@um.edu.my
authors.forename: N
authors.initials: N
authors.lastname: Yunus
authors.forename: A A
authors.initials: AA
authors.lastname: Rashid
authors.forename: L L
authors.initials: LL
authors.lastname: Azmi
authors.forename: M I
authors.initials: MI
authors.lastname: Abu-Hassan
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D019551:Dental Disinfectants / Q000494:pharmacology; D003819:Denture Bases; D006244:Hardness / Q000187:drug effects; D006801:Humans; D008422:Materials Testing / Q000379:methods; D018583:Pliability / Q000187:drug effects; D019904:Polymethyl Methacrylate / Q000737:chemistry
chemical_list: D000180:Acrylic Resins; D019551:Dental Disinfectants; C040291:Lucitone; D019904:Polymethyl Methacrylate