Influence of oxygen inhibition on the surface free-energy and dentin bond strength of self-etch adhesives
Influence of oxygen inhibition on the surface free-energy and dentin bond strength of self-etch adhesives
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DOI：
10.1111/j.1600-0722.2011.00849.x
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发表时间：
2011-10-01
影响因子：
1.9
通讯作者：
Miyazaki, Masashi
中科院分区：
文献类型：
--
作者：
Koga, Kensaku;Tsujimoto, Akimasa;Miyazaki, Masashi
我们比较了有氧抑制层和没有氧抑制层的单步自蚀刻胶粘剂的表面自由能和牙本质结合强度。用600粒碳化硅纸湿磨牛下颚门牙本质表面。将胶粘剂涂在牙本质上，光照射，保留或用乙醇去除氧抑制层。表面自由能是通过测量放置在固化粘合剂上的三种测试液体的接触角来确定的。测定了含氧抑制层和不含氧抑制层的牙本质结合强度。对于所有表面，估计的表面张力分量γ (LW)(S)的值相对恒定在35.5-39.8 mJ m（-2）。当氧抑制层被去除后，c(S)(+)， Lewis酸组分的值略有增加，而c(S)(-)， Lewis碱组分的值则显著降低。无氧抑制层的自蚀刻胶粘结强度（13.2 ~ 13.6 MPa）明显低于有氧抑制层的自蚀刻胶粘结强度（17.5 ~ 18.4 MPa）。这些结果表明，在具有先进光引发剂的单步自蚀刻胶粘剂中存在氧抑制层，可以提高牙本质的结合强度。
We compared the surface free-energies and dentin bond strengths of single-step self-etch adhesives with and without an oxygen-inhibited layer. The labial dentin surfaces of bovine mandibular incisors were wet ground with #600-grit silicon carbide paper. The adhesives were applied to the ground dentin, light-irradiated, and the oxygen-inhibited layer was either retained or removed with ethanol. The surface free-energies were determined by measuring the contact angles of three test liquids placed on the cured adhesives. The dentin bond strengths of specimens with and without the oxygen-inhibited layer were measured. For all surfaces, the value of the estimated surface tension component gamma(LW)(S) was relatively constant at 35.5-39.8 mJ m(-2). The value of the c(S)(+), Lewis acid component increased slightly when the oxygen-inhibited layer was removed, whereas that of the c(S)(-), Lewis base component decreased significantly. The bond strengths of the self-etch adhesives were significantly lower in specimens without an oxygen-inhibited layer (13.2-13.6 MPa) than in those with an oxygen-inhibited layer (17.5-18.4 MPa). These results indicate that the presence of an oxygen-inhibited layer in single-step self-etch adhesives with advanced photoinitiators promotes higher dentin bond strength.