填料含量对实验双固化树脂水门汀与纤维桩黏结强度的影响

Influence of silicon dioxide content to microtensile bond strength between experimental dual-cure resin composite luting cement and fiber post

目的:比较二氧化硅填料含量对EAM树脂材料黏结性能的影响,为研制纤维桩树脂核修复材料奠定基础。方法:根据二氧化硅填料在EAM树脂中添加含量的不同分为4组(A组:40%、B组:50%、C组:60%、D组:70%),E组(对照组)LuxaCore-Dual树脂,将各组树脂水门汀在圆筒形模具内分别与纤维桩黏结后,制备成微拉伸试件。用微拉伸试验机进行拉伸,直至试件破坏,并作统计学处理。结果:4个不同二氧化硅无机填料组的微拉伸强度分别为:A组(10.15±2.72)MPa,B组(11.48±2.81)MPa,C组(12.03±2.78)MPa,D组(10.07±2.06)MPa,E组(10.88±2.85)MPa,B、C两组的黏结强度显著高于A、D、E组(P<0.05)。结论:60%左右无机填料含量的复合树脂微拉伸黏结强度较为理想。

AIM： To evaluate the influence of different silicon dioxide content on the microtensile bond strength between experimental dual - cured resin cement and fiber posts in order to make a new cement material which could lute fibre reinforced post into root canal as well as make up post core at the same time. METHODS： According to silicon dioxide content of the dual -cure resin cement, four groups with 40% ,50% ,60% and 70% were designed separately. Control group was LuxaCore - Dual resin cement. Five groups were applied on to the posts and cut into microtensile sticks which were loaded in tension until failure. The results were analysed by One - Way ANOVE and LSD tests. RESULTS： The mean microtensile bond strengths of five groups resin composite materials were as follows： group A（10.15 ±2.72）MPa, group B（11.48±2.81 ）MPa, group C（12.03 ± 2. 78 ） MPa, group D（10.07±2.06） MPa, group E （ 10. 88 ± 2. 85 ） MPa. While both of group B and C were significantly higher than other groups （P 〈 0.05 ）. CONCLUSION： The bond strength between resin cement with 60% inorganic filler and fiber post was better than other groups.