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首页> 美国卫生研究院文献>PLoS Clinical Trials >Enhanced bonding strength between lithium disilicate ceramics and resin cement by multiple surface treatments after thermal cycling
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Enhanced bonding strength between lithium disilicate ceramics and resin cement by multiple surface treatments after thermal cycling

机译：通过热循环后的多次表面处理，增强了二硅酸锂陶瓷和树脂水泥之间的粘结强度

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摘要

All-ceramic restoration has become a popular technology for dental restoration; however, the relative bond strength between the ceramic and resin limits its further application. Long-term high bond strength, especially after thermal cycling, is of great importance for effective restoration. The effect of physical and/or chemical surface treatments on bonding durability is seldom reported. To overcome this problem, we investigate the bond strength between lithium disilicate ceramics (LDC) and two kinds of resin cements before and after thermal cycling for a variety of surface treatments including hydrofluoric acid, two kinds of silane and a combined effect. The shear bond strength in every group is characterized by universal mechanical testing machine averaged by sixteen-time measurements. The results show that when treated with HF and a mixed silane, the LDC surface shows maximum bonding strengths of 27.1 MPa and 23.3 MPa with two different resin cements after 5000 thermal cycling, respectively, indicating an excellent ability to resist the damage induced by cyclic expansion and contraction. This long-term high bond strength is attributed to the combined effect of micromechanical interlocking (physical bonding) and the formation of Si-O-Si and -C-C- at the interface (chemical bonding). This result offers great potential for enhancing bond strength for all-ceramic restoration by optimizing the surface treatment.
机译：全瓷修复已成为牙科修复的流行技术。然而，陶瓷和树脂之间的相对粘结强度限制了其进一步的应用。长期的高粘结强度，尤其是在热循环后，对于有效恢复非常重要。很少报道物理和/或化学表面处理对粘合耐久性的影响。为了克服这个问题，我们研究了二硅酸锂陶瓷（LDC）与两种树脂胶粘剂在热循环之前和之后进行的各种表面处理（包括氢氟酸，两种硅烷和综合作用）之间的结合强度。每组的剪切粘结强度均由通用机械试验机表征，该机械经16次测量平均。结果表明，经过HF和混合硅烷处理后，LDC表面在经过5000次热循环后分别在两种不同的树脂胶结物上的最大粘结强度分别为27.1 MPa和23.3 MPa，表明具有出色的抵抗循环膨胀引起的破坏的能力和收缩。这种长期的高粘结强度归因于微机械互锁（物理粘结）以及在界面处形成Si-O-Si和-C-C-（化学粘结）的综合作用。该结果为通过优化表面处理提高全瓷修复体的粘结强度提供了巨大潜力。

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