In vitro analysis of different properties of acrylic resins for ocular prosthesis submitted to accelerated aging with or without photopolymerized glaze.
The effect of a photopolymerized glaze on different properties of acrylic resin (AR) for ocular prostheses submitted to accelerated aging was investigated. Forty discs were divided into 4 groups: N1 AR without glaze (G1); colorless AR without glaze (G2); N1 AR with glaze (G3); and colorless AR with glaze (G4). All samples were polished with sandpaper (240, 600 and 800-grit). In G1 and G2, a 1200-grit sandpaper was also used. In G3 and G4, samples were coated with MegaSeal glaze. Property analysis of color stability, microhardness, roughness, and surface energy, and assays of atomic force microscopy, scanning electron microscopy, and energy-dispersive spectroscopy were performed before and after the accelerated aging (1008h). Data were submitted to the ANOVA and Tukey Test (p<0.05). Groups with glaze exhibited statistically higher color change and roughness after aging. The surface microhardness significantly decreased in groups with glaze and increased in groups without glaze. The surface energy increased after the aging, independent of the polishing procedure. All groups showed an increase of surface irregularities. Photopolymerized glaze is an inadequate surface treatment for AR for ocular prostheses and it affected the color stability, roughness, and microhardness. The accelerated aging interfered negatively with the properties of resins.
Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Sao Paulo State University (UNESP), Aracatuba, Sao Paulo, Brazil. Electronic address: danielamicheline@foa.unesp.br.
Daniela Micheline Dos
DM
Santos
Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Sao Paulo State University (UNESP), Aracatuba, Sao Paulo, Brazil.
Bruna Egumi
BE
Nagay
Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Sao Paulo State University (UNESP), Aracatuba, Sao Paulo, Brazil.
Emily Vivianne Freitas
EV
da Silva
Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Sao Paulo State University (UNESP), Aracatuba, Sao Paulo, Brazil.
Liliane da Rocha
Lda R
Bonatto
Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Sao Paulo State University (UNESP), Aracatuba, Sao Paulo, Brazil.
Mariana Vilela
MV
Sonego
Department of Oral Surgery and Pathology, School of Dentistry, Federal University of Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil.
Amália
A
Moreno
Technological Plasma Laboratory (LaPTec), Experimental Campus of Sorocaba, UNESP, Sorocaba, Sao Paulo, Brazil.
Elidiane Cipriano
EC
Rangel
Technological Plasma Laboratory (LaPTec), Experimental Campus of Sorocaba, UNESP, Sorocaba, Sao Paulo, Brazil.
Nilson Cristino
NC
da Cruz
Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Sao Paulo State University (UNESP), Aracatuba, Sao Paulo, Brazil.
Marcelo Coelho
MC
Goiato
D000180:Acrylic Resins / Q000737:chemistry*; D005137:Eye, Artificial; D006244:Hardness; D008027:Light; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D058105:Polymerization; D013052:Spectrometry, X-Ray Emission; D013997:Time Factors
D000180:Acrylic Resins
Acrylic resins; Artificial eye; Color; Hardness; Surface properties