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Effect of different disinfectants on the microhardness and roughness of acrylic resins for ocular prosthesis
Author(s) -
Moreno Amália,
Goiato Marcelo C.,
dos Santos Daniela M.,
Haddad Marcela F.,
Pesqueira Aldiéris A.,
Bannwart Lisiane C.
Publication year - 2013
Publication title -
gerodontology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.7
H-Index - 54
eISSN - 1741-2358
pISSN - 0734-0664
DOI - 10.1111/j.1741-2358.2012.00642.x
Subject(s) - indentation hardness , medicine , surface roughness , acrylic resin , prosthesis , surface finish , dentistry , chlorhexidine , disinfectant , composite material , materials science , surgery , microstructure , pathology , coating
Background: Ocular prosthesis materials should have specific properties for their indication and durability; therefore, it is important to investigate their physical behaviour when affected by several disinfectants. Objectives: This study evaluated the influence of different disinfecting solutions on the microhardness and surface roughness of acrylic resins for ocular prosthesis. Materials and Methods: Fifty samples simulating ocular prostheses were fabricated with N1 resin and colourless resin and divided ( n = 10) according to the disinfectant used: neutral soap, Opti‐free, Efferdent, 1% hypochlorite (HYC) and 4% chlorhexidine (CHX). Samples were stored in saline solution at 37°C and disinfected during 120 days. Both microhardness and roughness were investigated before, after 60 days and 120 days of disinfection and storage. Microhardness was measured using a microhardner and the roughness with a roughness device. Results: N1 resin showed lower microhardness when compared with colourless resin ( p < 0.05). HYC and CHX groups exhibited the highest change of microhardness and roughness values ( p < 0.05). An increase in roughness and reduction in microhardness of ocular acrylic resins were observed after both periods of disinfection and storage ( p < 0.05). Conclusion: Both disinfection/storage periods affected the microhardness and roughness values of the samples.