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The Influence of Nanostructured Alumina Coating on Bonding and Optical Properties of Translucent Zirconia Ceramics: In Vitro Evaluation
Coatings ( IF 3.4 ) Pub Date : 2021-09-16 , DOI: 10.3390/coatings11091126
Tine Malgaj , Tadej Mirt , Andraž Kocjan , Peter Jevnikar

Thin, non-retentive, monolithic restorations fabricated from novel translucent zirconia ceramics are widely used in contemporary dentistry. Because of the chemical inertness of zirconia, debonding of such restorations remains the main clinical complication. Limited evidence on the bonding performance of novel translucent zirconia exists; therefore, the present study aimed to evaluate, in vitro, the shear-bond strength (SBS) of translucent zirconia modified with a nanostructured alumina coating (NAC). The SBS of resin cement to translucent zirconia, materials containing 3, 4 or 5 mol.% of yttria modified with NAC, was measured and related to airborne-particle abraded (APA) zirconia surfaces. Half of each of the specimen groups (n = 20) were subjected to 37,500 thermocycles in water. In addition, to evaluate the effect of NAC on thin translucent zirconia discs (n = 10), the translucency parameter (TP) was measured and compared with APA. The results were statistically analyzed using a t-test and one-way ANOVA. NAC provided higher resin-zirconia SBS compared to APA, not affecting the zirconia optical properties. APA, on the other hand, lowered TP for all types of zirconia. NAC did not impair the mechanical or optical properties of translucent zirconia materials and should be regarded as a zirconia pretreatment alternative to APA.

中文翻译:

纳米结构氧化铝涂层对半透明氧化锆陶瓷结合和光学性能的影响:体外评价

由新型半透明氧化锆陶瓷制成的薄、非固位、整体修复体广泛用于当代牙科。由于氧化锆的化学惰性,此类修复体的脱粘仍然是主要的临床并发症。关于新型半透明氧化锆的粘合性能的证据有限;因此,本研究旨在体外评估用纳米结构氧化铝涂层 (NAC) 改性的半透明氧化锆的剪切粘合强度 (SBS)。树脂水泥到半透明氧化锆(含有 3、4 或 5 mol.% 的 NAC 改性氧化钇的材料)的 SBS 被测量并与气载颗粒磨损 (APA) 氧化锆表面相关。每个样本组的一半 ( n= 20) 在水中进行 37,500 次热循环。此外,为了评估 NAC 对薄半透明氧化锆圆盘 ( n = 10) 的影响,测量了半透明参数 (TP) 并与 APA 进行了比较。使用t检验和单向方差分析对结果进行统计分析。与 APA 相比,NAC 提供了更高的树脂-氧化锆 SBS,不会影响氧化锆的光学性能。另一方面,APA 降低了所有类型氧化锆的 TP。NAC 不会损害半透明氧化锆材料的机械或光学性能,应被视为 APA 的氧化锆预处理替代品。
更新日期:2021-09-16
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