Department of Fixed Prosthodontics and Dental Materials, University of Siena, Policlinico Le Scotte, Siena, Italy.
Clin Oral Investig. 2011 Apr;15(2):249-56. doi: 10.1007/s00784-009-0370-5. Epub 2010 Jan 7.
The study evaluated the effect of ozone application on the composite-to-composite bond. Three hundred and twenty cylindrical composite specimens were divided into two groups: group 1 was subjected to a 60 s ozone application, whereas group 2 remained untreated. Four subgroups were obtained from each group according to the intermediate repair agent: an adhesive, a silane, silane/adhesive combination, or flowable composite. Repair composite cylinders were built-up. The composite repair strength was tested after 24 h and after thermocycling with a shear test. Additionally, 4 mm × 4 mm × 2 mm composite specimens were prepared and stored 24 h in deionized water. Half of the specimens were subjected to ozone application and the other served as control. The elastic modulus (E) and the Vicker's hardness (VH) of the composite surfaces were tested immediately and after thermocycling. Significant differences among the experimental groups were detected (p < 0.001). The composite repair strength was affected by the pretreatment and by the intermediate agent, whereas, the thermocycling was not significant. The partial eta-squared statistics showed that the intermediate agent was the main factor affecting the composite repair strength, whereas the pretreatment played a minor role. No differences were observed between ozone and control groups when the same intermediate agent and the same aging conditions were applied. Repairing with flowable composite tended to achieve higher bond strengths (20.7 and 26.5 MPa in ozone and control groups, respectively, after 24 h). The use of silane coupling agent showed the lowest composite repair strengths. Ozone did not affect E and VH (p > 0.05) and the thermocycling affected only E (p < 0.05). In conclusion, the application of ozone does not impair the composite-to-composite bond.
该研究评估了臭氧应用对复合-复合粘结的影响。将 320 个圆柱形复合试件分为两组：第 1 组接受 60 秒的臭氧处理，而第 2 组则未进行处理。每组又根据中间修复剂分为四个亚组：一种胶粘剂、一种硅烷、硅烷/胶粘剂组合或流动性复合树脂。构建修复复合圆柱体。用剪切试验在 24 小时和热循环后测试复合修复强度。此外，制备了 4mm×4mm×2mm 的复合试件，并在去离子水中储存 24 小时。一半的试件进行臭氧处理，另一半作为对照。测试复合表面的弹性模量 (E) 和维氏硬度 (VH)，立即测试和热循环后测试。实验组之间存在显著差异 (p<0.001)。复合修复强度受预处理和中间剂的影响，而热循环的影响不显著。偏 eta 平方统计表明，中间剂是影响复合修复强度的主要因素，而预处理的作用较小。当使用相同的中间剂和相同的老化条件时，臭氧组和对照组之间没有观察到差异。使用流动性复合树脂进行修复往往可以获得更高的粘结强度（24 小时后，臭氧组和对照组的粘结强度分别为 20.7 和 26.5MPa）。使用硅烷偶联剂的复合修复强度最低。臭氧处理不影响 E 和 VH（p>0.05），热循环仅影响 E（p<0.05）。总之，臭氧处理不会损害复合-复合粘结。
