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首页> 外文期刊>The Journal of Prosthetic Dentistry >Effect of etching and airborne particle abrasion on the microstructure of different dental ceramics.
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Effect of etching and airborne particle abrasion on the microstructure of different dental ceramics.

机译：蚀刻和气载颗粒磨损对不同牙科陶瓷微观结构的影响。

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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 resultingsections 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-microm 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-microm 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-microm 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.
机译：问题陈述：全陶瓷修复体的陶瓷成分和微观结构表面是有效粘合基底的重要组成部分。氢氟酸蚀刻和空气中的氧化铝颗粒磨损都会产生微机械粘合所需的不规则表面。尽管以前已经研究过长石和白云石瓷的表面处理，但尚未充分研究含高氧化铝和二硅酸锂的陶瓷。目的：本研究的目的是评估经过氢氟酸蚀刻或空气氧化铝颗粒磨蚀处理后的6种不同陶瓷的表面形貌。材料和方法：按照制造商的说明分别制造了IPS Empress，IPS Empress 2（0.8毫米厚），Cergogold（0.7毫米厚），Ceram氧化铝，Ceram氧化锆和Procera（0.8毫米）五个内盖。通过金刚石盘将每个顶盖纵向切成4等份。然后根据随后的表面处理将得到的切片随机分为3组：第1组，没有额外表面处理的标本，如从实验室（对照组）收到的;第2组，通过使用空气微粒磨蚀和50微米氧化铝处理的样品;第3组，样品用10％氢氟酸蚀刻处理（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）。结果：空气传播的颗粒磨损改变了IPS Empress，IPS Empress 2和Cergogold陶瓷的形貌表面。这些陶瓷的表面形貌显示出浅的不规则性，在对照组中不明显。对于Procera，50微米氧化铝空气传播的颗粒磨损产生了平坦的表面。 In-Ceram氧化铝和In-Ceram氧化锆的空气传播颗粒磨损没有改变其形貌特征，并且在对照组中发现了相同的浅坑。对于IPS Empress 2，10％的氢氟酸蚀刻产生了细长的晶体，这些晶体散布着浅浅的凹凸。对于IPS Empress和Cergogold，其陶瓷表面的形态特征为蜂窝状。陶瓷内氧化铝，陶瓷内氧化锆和Procera的表面处理并未改变其表面结构。结论：氢氟酸蚀刻和50微米氧化铝对空气中颗粒的磨损增加了IPS Empress，IPS Empress 2和Cergogold陶瓷表面的不规则性。陶瓷内氧化铝，陶瓷内氧化锆和Procera的相似处理不会改变其形态微观结构。

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