Effect of etching and airborne particle abrasion on the microstructure of different dental ceramics
Effect of etching and airborne particle abrasion on the microstructure of different dental ceramics
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DOI：
10.1016/s0022-3913(02)52704-9
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发表时间：
2003-05-01
影响因子：
4.6
通讯作者：
Chan, DCN
中科院分区：
文献类型：
--
作者：
Borges, GA;Sophr, AM;Chan, DCN
问题的陈述。全陶瓷涂层的陶瓷成分和显微结构表面是有效连接基体的重要组成部分。氢氟酸蚀刻和空气中的氧化铝颗粒磨损都产生微机械键合所需的不规则表面。虽然人们已经研究了长石瓷和白榴石瓷的表面处理，但对高铝瓷和二硅酸锂瓷的表面处理还没有充分的研究。本研究的目的是评估6种不同陶瓷的表面形貌处理后，无论是氢氟酸蚀刻或空气中的氧化铝颗粒磨损。材料和方法。按照制造商的说明制造IPS Empress、IPS Empress 2（0.8mm厚）、Cergogold（0.7mm厚）、In-Ceram氧化铝、In-Ceram氧化锆和Procera（0.8mm厚）中的每一个的五个内冠。用菱形圆盘将每个顶盖纵向切成4等份。根据随后的表面处理，将所得切片随机分为3组：第1组，没有额外表面处理的样本，如从实验室接收的（对照）;第2组，通过使用空气传播颗粒磨损用50 μ m氧化铝处理的样本;以及第3组，用10%氢氟酸蚀刻处理的样本（IPS Empress 2为20秒; IPS Empress和Cergogold为60秒; In-Ceram氧化铝、In-Ceram氧化锆和Procera为2分钟）。气载颗粒磨损改变了IPS Empress、IPS Empress 2和Cergogold陶瓷的表面形态。这些陶瓷的表面形貌表现出在对照组中不明显的浅的不规则性。对于Procera，50 μ m氧化铝气载颗粒磨损产生了平整的表面。In-Ceram氧化铝和In-Ceram氧化锆的气载颗粒磨损没有改变形态特征，并且在对照组中发现的相同浅坑仍然存在。对于IPS Empress 2，10%氢氟酸蚀刻产生分散有浅不规则的细长晶体。对于IPS Empress和Cergogold，陶瓷表面的形态特征为蜂窝状。In-Ceram氧化铝、In-Ceram氧化锆和Procera的表面处理未改变其表面结构。氢氟酸蚀刻和空气中的颗粒磨损与50微米氧化铝增加了IPS皇后，IPS皇后2，和Cergogold陶瓷表面上的不规则性。In-Ceram氧化铝、In-Ceram氧化锆和Procera的类似处理没有改变它们的形态微观结构。
Statement of problem. The ceramic composition and microstructure surface of all-ceramic restorations are important components of an effective bonding substrate. Both hydrofluoric acid etching and airborne aluminum oxide particle abrasion produce irregular surfaces necessary for micromechanical bonding. Although surface treatments of feldspathic and leucite porcelains have been studied previously, the high alumina-containing and lithium disilicate ceramics have not been fully investigated.Purpose. The purpose of this study was to assess the surface topography of 6 different ceramics after treatment with either hydrofluoric acid etching or airborne aluminum oxide particle abrasion.Material and methods. Five copings each of IPS Empress, IPS Empress 2 (0.8 mm thick), Cergogold (0.7 mm thick), In-Ceram Alumina, In-Ceram Zirconia, and Procera (0.8 mm thick) were fabricated following the manufacturer's instructions. Each coping was longitudinally sectioned into 4 equal parts by a diamond disk. The resulting sections were then randomly divided into 3 groups depending on subsequent surface treatments: Group 1, specimens without additional surface treatments, as received from the laboratory (control); Group 2, specimens treated by use of airborne particle abrasion with 50-mum aluminum oxide; and Group 3, specimens treated with 10% hydrofluoric acid etching (20 seconds for IPS Empress 2; 60 seconds for IPS Empress and Cergogold; and 2 minutes for In-Ceram Alumina, In-Ceram Zirconia, and Procera).Results. Airborne particle abrasion changed the morphologic surface of IPS Empress, IPS Empress 2, and Cergogold ceramics. The surface topography of these ceramics exhibited shallow irregularities not evident in the control group. For Procera, the 50-mum aluminum oxide airborne particle abrasion produced a flattened surface. Airborne particle abrasion of In-Ceram Alumina and In-Ceram Zirconia did not change the morphologic characteristics and the same shallows pits found in the control group remained. For IPS Empress 2, 10% hydrofluoric acid etching produced elongated crystals scattered with shallow irregularities. For IPS Empress and Cergogold, the morphologic characteristic was honeycomb-like on the ceramic surface. The surface treatment of In-Ceram Alumina, In-Ceram Zirconia, and Procera did not change their superficial structure.Conclusion. Hydrofluoric acid etching and airborne particle abrasion with 50-mum aluminum oxide increased the irregularities on the surface of IPS Empress, IPS Empress 2, and Cergogold ceramics. Similar treatment of In-Ceram Alumina, In-Ceram Zirconia, and Procera did not change their morphologic microstructure.