Santos Daniela Micheline Dos, Nagay Bruna Egumi, da Silva Emily Vivianne Freitas, Bonatto Liliane da Rocha, Sonego Mariana Vilela, Moreno Amália, Rangel Elidiane Cipriano, da Cruz Nilson Cristino, Goiato Marcelo Coelho
Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Sao Paulo State University (UNESP), Aracatuba, Sao Paulo, Brazil.
Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Sao Paulo State University (UNESP), Aracatuba, Sao Paulo, Brazil.
Mater Sci Eng C Mater Biol Appl. 2016 Dec 1;69:995-1003. doi: 10.1016/j.msec.2016.07.081. Epub 2016 Aug 2.
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.
研究了光聚合釉对经受加速老化的眼部假体丙烯酸树脂（AR）不同性能的影响。将40个圆盘分为4组：无釉的N1 AR（G1）；无釉的无色AR（G2）；有釉的N1 AR（G3）；有釉的无色AR（G4）。所有样品均用砂纸（240、600和800目）打磨。在G1和G2组中，还使用了1200目砂纸。在G3和G4组中，样品涂覆有MegaSeal釉。在加速老化（1008小时）前后进行颜色稳定性、显微硬度、粗糙度和表面能的性能分析，以及原子力显微镜、扫描电子显微镜和能量色散光谱分析。数据进行方差分析和Tukey检验（p<0.05）。有釉的组在老化后颜色变化和粗糙度在统计学上更高。有釉的组表面显微硬度显著降低，无釉的组则增加。老化后表面能增加，与打磨程序无关。所有组表面不规则性均增加。光聚合釉对眼部假体的AR来说是一种不适当的表面处理，它影响了颜色稳定性、粗糙度和显微硬度。加速老化对树脂性能产生了负面影响。
