The occurrence of porosity in reline acrylic resins. Effect of microwave disinfection

Gerodontology
Polyanna Maria Rocha NovaisJanaina Habib Jorge

Abstract

Microwave energy has proved to be an effective method for disinfecting acrylic dentures. However, the effect of microwave heating on the porosity of autopolymerising denture reline resins has not been investigated. The purpose of the study was to determine the effect of microwave disinfection on the porosity of autopolymerised denture reline materials (Kooliner-K, New Truliner-NT, Tokuso Rebase Fast-TR and Ufi Gel Hard-UGH) and a conventional heat-polymerised denture base resin (Lucitone 550-L). Specimens (10 mm x 20 mm x 1 mm) were obtained from the impression surface of the palatal mucosa in a single person and divided into four groups (n = 5). The porosity was evaluated after polymerisation (C1), after two cycles of microwave disinfection (MW2), after seven cycles of microwave disinfection (MW7) and after 7 days storage in water at 37 degrees C (C2). Specimens from group MW7 were exposed to microwave disinfection daily being stored in water at 37 degrees C between exposures. All the replicas were sputter coated with gold and micrographs/digital images were taken of each replica using scanning electron microscopy at magnification x 100. The SEM micrographs were then examined using an image analyser to determine the number of ...Continue Reading

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Citations

Sep 19, 2012·Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology·Mariana Montenegro SilvaCarlos Eduardo Vergani
Nov 23, 2011·Gerodontology·Lívia Sertori FinotiCarlos Eduardo Vergani
Nov 3, 2011·Journal of Dentistry·Eduardo Buozi MoffaCarlos Eduardo Vergani

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