Magni Elisa, Ferrari Marco, Hickel Reinhard, Huth Karin Christine, Ilie Nicoleta
Department of Fixed Prosthodontics and Dental Materials, University of Siena, Italy.
Dent Mater. 2008 Oct;24(10):1428-34. doi: 10.1016/j.dental.2008.06.004. Epub 2008 Jul 22.
To assess the effect of ozone gas on the mechanical properties of different classes of dental adhesives.
Extracted molars were sectioned perpendicularly to their long axis for obtaining dentin slices to be bonded with one of the following adhesives: Prime&Bond NT (Dentsply), Excite (Ivoclar-Vivadent), Syntac/Heliobond (Ivoclar-Vivadent) and Silorane System Adhesive (3 M-ESPE). Prior to bonding, the slices were sectioned in two halves: one was treated with ozone gas for 120 s (4.2g/m3; HealOzone, KaVo) and the other served as control. The Vicker's hardness (VH), elastic modulus (E), elastic work (We/Wtot) and the creep (Cr) of the materials were measured with an automatic micro hardness indenter (Fischer) 30 min and 24 h after bonding procedure. Data were analyzed with the multivariate ANOVA followed by the Tukey's test and partial eta-squared statistics.
The adhesive and the time of testing were significant factors affecting the investigated parameters (p<0.001; etap2>or=0.06). Dentin treatment, though significant, exerted a minimal effect on mechanical properties (etap2<or=0.01). Ozone did not consistently affect the mechanical properties at both, 30 min and 24 h measurements, as all variations were below 10%. Small differences between ozone and control resulted only in the Cr and We/Wtot of Excite and in the VH of the Silorane System Adhesive at the 30 min measurement; and in the We/Wtot, Cr and VH of the Syntac/Heliobond system after 24h.
Ozone gas did not compromise the mechanical properities of the tested adhesives. Thus, its application on dentin prior to bonding procedures is possible, without impairing the performance of the final restoration.
评估臭氧气体对不同种类牙科粘合剂力学性能的影响。
将拔除的磨牙沿其长轴垂直切片，以获取用于与以下粘合剂之一粘结的牙本质切片：Prime&Bond NT（登士柏公司）、Excite（义获嘉伟瓦登特公司）、Syntac/Heliobond（义获嘉伟瓦登特公司）和Silorane系统粘合剂（3M-ESPE公司）。在粘结之前，将切片切成两半：一半用臭氧气体处理120秒（4.2克/立方米；HealOzone，卡瓦公司），另一半作为对照。在粘结操作后30分钟和24小时，使用自动显微硬度压头（菲舍尔公司）测量材料的维氏硬度（VH）、弹性模量（E）、弹性功（We/Wtot）和蠕变（Cr）。数据采用多因素方差分析，随后进行Tukey检验和偏η²统计分析。
粘合剂和测试时间是影响所研究参数的显著因素（p<0.001；ηp²≥0.06）。牙本质处理虽然具有显著性，但对力学性能的影响极小（ηp²≤0.01）。臭氧在30分钟和24小时测量时对力学性能的影响并不一致，因为所有变化均低于10%。臭氧与对照之间的微小差异仅导致在30分钟测量时Excite的Cr和We/Wtot以及Silorane系统粘合剂的VH有所不同；在24小时后导致Syntac/Heliobond系统的We/Wtot、Cr和VH有所不同。
臭氧气体并未损害所测试粘合剂的力学性能。因此，在粘结操作之前将其应用于牙本质是可行的，不会损害最终修复体的性能。
