Objective

Hydrofluoric-acid etching followed by silanization is a routine clinical protocol for durable bonding to glass ceramics. Simplifying ceramic-bonding procedures, new technological developments involve the inclusion of a silane coupling agent in a self-adhesive composite cement. To investigate the effectiveness of the incorporated silane coupling agent, shear bond strength (SB) to ceramic and dentin, contact angle of water (CA), transmission electron microscopy (TEM), X-ray diffraction (XRD) and ²⁹Si nuclear magnetic resonance (NMR) assessments were correlatively conducted.

Materials and Methods

SB to glass ceramic was measured without (‘immediate’) and with (‘aged’) 50K thermocycles upon application of (1) the silane-containing self-adhesive composite cement Panavia SA Cement Universal (‘SAU’), being light-cured: ‘SAU_light’, (2) ‘SAU_chem’: chemically cured SAU, (3) ‘SAP_light’: light-cured Panavia SA Cement Plus (‘SAP’), and (4) ‘SAP_CP’: SAP light-cured after separate silanization using Clearfil Ceramic Primer Plus (‘CP’). CA was also measured on glass ceramic. The cement pastes before and upon mixing were characterized using ²⁹Si NMR. SB of SAU or SAP onto dentin was measured. Finally, the cement-dentin interface was characterized by TEM and XRD.

Results

The immediate and aged SB to glass ceramic of SAU did not significantly differ from those of SAP_CP, while they were significantly higher than those of SAP. CA of SAU did not significantly differ from that of SAP_CP, but it was significantly higher than CA of SAP. ²⁹Si NMR revealed siloxane bonds after mixture. SB of SAU and SAP to dentin did not show any significant difference. SEM, TEM and XRD confirmed tight and chemical interaction, respectively.

Significance

Incorporating silane in a 10-MDP-based self-adhesive composite cement combined efficient silane-coupling ability at the ceramic surface with effective bonding ability at dentin.

中文翻译：

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含硅烷的自粘复合水泥的硅烷偶联作用。

目的

氢氟酸蚀刻后再进行硅烷化是一种可持久粘合至玻璃陶瓷的常规临床规程。为简化陶瓷粘接程序，新技术的发展包括在自粘复合水泥中加入硅烷偶联剂。研究掺入的硅烷偶联剂的有效性，与陶瓷和牙本质的剪切粘结强度（SB），水的接触角（CA），透射电子显微镜（TEM），X射线衍射（XRD）和²⁹ Si核磁共振（NMR）评估进行了相关。

材料和方法

在施加（1）光固化的含硅烷的自粘复合水泥Panavia SA Cement Universal（'SAU'）的情况下，在没有（“立即”）和（“老化”）50K热循环的情况下测量玻璃陶瓷的SB ：'SAU_light'，（2）'SAU_chem'：化学固化的SAU，（3）'SAP_light'：光固化的Panavia SA Cement Plus（'SAP'），以及（4）'SAP_CP'：SAP单独固化后光固化使用Clearfil Ceramic Primer Plus（'CP'）进行硅烷化。CA也在玻璃陶瓷上测量。使用²⁹ Si NMR对混合前后的水泥浆进行表征。测量SAU或SAP在牙本质上的SB。最后，通过TEM和XRD对水泥-牙本质界面进行了表征。

结果

SAU的立即和老化的SAU到玻璃陶瓷与SAP_CP的无明显差异，但明显高于SAP。SAU的CA与SAP_CP的CA并无显着差异，但显着高于SAP的CA。混合后的²⁹ Si NMR揭示了硅氧烷键。SAU的SB和SAP的牙本质无明显差异。SEM，TEM和XRD分别证实了紧密和化学的相互作用。

意义

在基于10-MDP的自粘复合水泥中掺入硅烷，可将陶瓷表面的有效硅烷偶联能力与牙本质的有效粘结能力结合在一起。