臭氧气体对牙釉质剪切粘结强度的影响。

Effect of ozone gas on the shear bond strength to enamel.

机构信息

Dental School, Department of Operative Dentistry, University of Porto, Porto, Portugal.

出版信息

J Appl Oral Sci. 2013 Mar-Apr;21(2):177-82. doi: 10.1590/1678-7757201302362.

DOI:10.1590/1678-7757201302362

PMID:23739859

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3881866/

Abstract

UNLABELLED

Ozone is an important disinfecting agent, however its influence on enamel adhesion has not yet been clarified.

OBJECTIVE

Evaluate the influence of ozone pretreatment on the shear strength of an etch-and-rinse and a self-etch system to enamel and analyze the respective failure modes.

MATERIAL AND METHODS

Sixty sound bovine incisors were used. Specimens were randomly assigned to four experimental groups (n=15): Group G1 (Excite® with ozone) and group G3 (AdheSE® with ozone) were prepared with ozone gas from the HealOzone unit (Kavo®) for 20 s prior to adhesion, and groups G2 (Excite®) and G4 (AdheSE®) were used as control. Teeth were bisected and polished to simulate a smear layer just before the application of the adhesive systems. The adhesives were applied according to the manufacturer's instructions to a standardized 3 mm diameter surface, and a composite (Synergy D6, Coltene Whaledent) cylinder with 2 mm increments was build. Specimens were stored in 100% humidity for 24 h at 37°C and then subjected to a thermal cycling regimen of 500 cycles. Shear bond tests were performed with a Watanabe device in a universal testing machine at 5 mm/min. The failure mode was analyzed under scanning electron microscope. Means and standard deviation of shear bond strength (SBS) were calculated and difference between the groups was analyzed using ANOVA, Kolmogorov-Smirnov, Levene and Bonferroni. Chi-squared statistical tests were used to evaluate the failure modes.

RESULTS

Mean bond strength values and failure modes were as follows: G1--26.85±6.18 MPa (33.3% of adhesive cohesive failure); G2--27.95±5.58 MPa (53.8% of adhesive failures between enamel and adhesive); G3--15.0±3.84 MPa (77.8% of adhesive failures between enamel and adhesive) and G4--13.1±3.68 MPa (36.4% of adhesive failures between enamel and adhesive).

CONCLUSIONS

Shear bond strength values of both adhesives tested on enamel were not influenced by the previous application of ozone gas.

摘要

未加标签

臭氧是一种重要的消毒剂，但其对牙釉质黏附力的影响尚未阐明。

目的

评估臭氧预处理对酸蚀-冲洗黏结系统和自酸蚀黏结系统黏结于牙釉质的剪切强度的影响，并分析各自的失效模式。

材料和方法

使用 60 颗健康牛切牙。标本被随机分为 4 个实验组（n=15）：G1 组（用臭氧处理的 Excite®）和 G3 组（用臭氧处理的 AdheSE®）在黏结前用来自 HealOzone 装置（Kavo®）的臭氧气体处理 20 s，G2 组（用 Excite®）和 G4 组（用 AdheSE®）作为对照。牙齿被等分并抛光，以模拟在应用黏结系统之前的玷污层。根据制造商的说明，将黏结剂应用于标准化的 3mm 直径表面，并用 2mm 增量构建一个复合树脂（Synergy D6，Coltene Whaledent）圆柱体。标本在 37°C 下在 100%湿度下储存 24 h，然后进行 500 次热循环。用 Watanabe 装置在万能试验机上以 5mm/min 的速度进行剪切黏结强度测试。在扫描电子显微镜下分析失效模式。计算剪切黏结强度（SBS）的均值和标准差，并使用 ANOVA、Kolmogorov-Smirnov、Levene 和 Bonferroni 分析组间差异。使用卡方检验统计分析评估失效模式。

结果

平均黏结强度值和失效模式如下：G1 组--26.85±6.18MPa（33.3%为黏结剂内聚性破坏）；G2 组--27.95±5.58MPa（53.8%为牙釉质与黏结剂之间的黏结失败）；G3 组--15.0±3.84MPa（77.8%为牙釉质与黏结剂之间的黏结失败）和 G4 组--13.1±3.68MPa（36.4%为牙釉质与黏结剂之间的黏结失败）。