Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil.
Department of Biomaterials and Oral Biology, School of Dentistry, University of Sao Paulo, Sao Paulo, SP, Brazil.
J Esthet Restor Dent. 2020 Jul;32(5):521-529. doi: 10.1111/jerd.12615. Epub 2020 Jun 29.
To evaluate the effects of human saliva decontamination protocols on bond strength of resin cement to zirconia (Y-PSZ), wettability, and microbial decontamination.
Zirconia plates were sandblasted and divided into (a) not contaminated, (b) contaminated with human saliva and: (c) not cleaned, (d) cleaned with air-water spray, (e) cleaned with 70% ethanol, (f) cleaned with Ivoclean, or (g) cleaned with nonthermal atmospheric plasma (NTAP). The wettability and microbial decontamination of the surfaces were determined after saliva contamination or cleaning. Monobond Plus (Ivoclar Vivadent) was applied after cleaning, followed by Variolink LC (Ivoclar Vivadent). The samples were stored 1 week before shear bond strength (SBS) testing, and data (SBS and wettability) were analyzed by one-way analysis of variance and Tukey test (α = .05).
Saliva contamination reduced SBS to zirconia compared to not contaminated. Both Ivoclean and NTAP produced higher SBS compared to not cleaned and were not significantly different from the not contaminated. Ivoclean produced the highest contact angle, and NTAP the lowest. With the exception of using just water-spray, all cleaning protocols decontaminated the specimens.
Both Ivoclean and NTAP overcame the effects of saliva contamination, producing an SBS to zirconia comparable to the positive control.
Dental ceramics should be cleaned prior to resin cementation to eliminate the effects of human saliva contamination, and Ivoclean and NTAP are considered suitable materials for this purpose.
评估人唾液去污方案对氧化锆（Y-PSZ）粘结强度、润湿性和微生物去污的影响。
将氧化锆板喷砂后分为（a）未污染、（b）污染唾液但未清洁、（c）污染唾液并用空气-水喷雾清洁、（d）污染唾液并用 70%乙醇清洁、（e）污染唾液并用 Ivoclean 清洁、或（f）污染唾液并用非热常压等离子体（NTAP）清洁。唾液污染或清洁后，测定表面润湿性和微生物去污效果。清洁后，应用 Monobond Plus（义获嘉），随后用 Variolink LC（义获嘉）。所有样本在进行剪切粘结强度（SBS）测试前储存 1 周，采用单因素方差分析和 Tukey 检验（α=0.05）对 SBS 和润湿性数据进行分析。
与未污染组相比，唾液污染降低了氧化锆的 SBS。与未清洁组相比，Ivoclean 和 NTAP 均产生了更高的 SBS，且与未污染组无显著差异。Ivoclean 产生的接触角最大，而 NTAP 产生的接触角最小。除仅用水喷雾清洁外，所有清洁方案均对标本进行了消毒。
Ivoclean 和 NTAP 均克服了唾液污染的影响，产生的氧化锆 SBS 与阳性对照组相当。
在进行树脂粘结前，牙科陶瓷应进行清洁以消除人唾液污染的影响，Ivoclean 和 NTAP 被认为是适合该目的的材料。
