GI-Ⅱ渗透陶瓷表面不同处理方式对瓷与牙本质粘接抗剪强度的影响

Shear Strength of Bond of the Dentin to GI-Ⅱ Glass-infiltrated Alumia Ceramic Agter Varying Modes of Surface Conditioning

目的 :探讨合适的渗透陶瓷表面处理方式。方法 :以不同的表面处理为影响因素 ,将陶瓷片分为 4组 ,采用水平推式剪切强度试验法 ,所得试验数据经统计学分析 ,考察不同表面处理方式与常规Bis GMA类树脂粘接剂间的结合强度。结果 :HF加硅烷、喷砂加硅烷组粘接抗剪强度 2 4h略增加 ,但差别无统计学意义 ,在模拟口腔环境下30d后 ,抗剪强度下降十分明显 ,而热学硅涂层加硅烷组 2 4h后增加明显 ,与其它组对照差别有统计学意义 (P <0 .0 5 ) ,30d后抗剪强度略有下降。结论 :热学硅涂层加硅烷是渗透陶瓷粘接面的较好的处理方法。

Objective: The adequate surface conditioning method for GI Ⅱ glass infiltrated alumia ceramic was investigated. Methods: The test specimens were divided into 3 groups (A. HF + silicone, B. sandblasting + silicone and C. thermal silicoating + silicone). Shear bonding strengths of porcelain bonded to dentin were tested. Results: The bond strength of group A and B slightly increased after one day but decreased sharply after 30 days. However, no statistical significance was observed. The group C showed a pronounced enlargement of bond strength after one day and had a durable bond after 30 days′ thermal cycling. It is statistically significant when group C was compared with group A and B. Conclusion: It can be inferred that silicoating method be a better way for glass infiltrated alumia ceramic bonding.\;