Sevilla Pablo, Gseibat Mustafa, Peláez Jesús, Suárez María J, López-Suárez Carlos
Department of Conservative Dentistry and Buco-facial Prosthesis, Faculty of Odontology, University Complutense of Madrid, 28040 Madrid, Spain.
Materials (Basel). 2023 Sep 3;16(17):6055. doi: 10.3390/ma16176055.
The purpose of this study was to investigate the effect of low-pressure plasma on the contact angle, shear bond strength (SBS), and the failure mode of zirconia ceramic. Zirconia specimens were divided into three groups according to the surface treatment methods as follows: sandblasting with aluminum oxide (ZR-C), sandblasting with aluminum oxide and oxygen plasma (ZR-CP), and argon plasma (ZR-P). The contact angle, SBS, and surface characteristics were tested after thermocycling. Data analysis was made using the Kruskal-Wallis test and one-way analysis of variance. Plasma treatment significantly reduced the contact angle ( < 0.001) with the lowest value for the Zr-P group. An increase in oxygen and a decrease in carbon was observed on the zirconia surface in both plasma groups. For the SBS, there were significant differences among the groups ( < 0.018), the Zr-CP group showing the highest bond strength. Mixed failures were the most frequent. Plasma treatment was effective in increasing the wettability, increasing the oxygen/carbon ratio without changing zirconia surface morphology. The sandblasting plus plasma with oxygen group exhibited the highest bond strength.
本研究的目的是探讨低压等离子体对氧化锆陶瓷接触角、剪切粘结强度（SBS）及失效模式的影响。根据表面处理方法将氧化锆试件分为三组，如下：用氧化铝喷砂处理（ZR-C）、用氧化铝喷砂处理并结合氧等离子体处理（ZR-CP）以及氩等离子体处理（ZR-P）。热循环后测试接触角、SBS及表面特性。采用Kruskal-Wallis检验和单因素方差分析进行数据分析。等离子体处理显著降低了接触角（<0.001），Zr-P组的值最低。在两个等离子体处理组中，氧化锆表面均观察到氧含量增加和碳含量降低。对于SBS，各组间存在显著差异（<0.018），Zr-CP组显示出最高的粘结强度。混合失效最为常见。等离子体处理有效地提高了润湿性，增加了氧/碳比，而未改变氧化锆的表面形态。喷砂加氧等离子体处理组表现出最高的粘结强度。
