不同表面粗糙度钛合金与牙本质之间粘接强度的比较(英文)  

Bond strength between titanium alloy with different surface roughness and dentin

作　　者：张磊[1] 王雪[1] 刘华英[1] 

机构地区：[1]青岛大学医学院附属医院口腔修复科,山东省青岛市266003

出　　处：《中国组织工程研究与临床康复》2009年第47期9398-9400,共3页Journal of Clinical Rehabilitative Tissue Engineering Research

摘　　要：目的:观察比较不同表面粗糙度的钛合金与牙本质之间拉伸粘接强度差别。方法:钛合金铸件30个,随机平均分为6组,分别用60,80,100,150,240,320目的碳化硅砂纸打磨粘接面,测定打磨后铸件的表面粗糙度。收集1个月内拔除的人新鲜离体磨牙30颗,在流水冲洗下去除牙合面釉质暴露浅层牙本质,依次用320,400,600目碳化硅水磨砂纸打磨牙本质面。利用KetacTMCemEasymix玻璃离子水门汀将打磨后的钛合金铸件和牙本质粘接,经37℃恒温水浴24h后,用万能试验机检测其微拉伸粘接强度,然后在扫描电镜下观察粘接断面形态。结果:经80目碳化硅砂纸打磨后的钛合金铸件组和牙本质之间的粘接强度最大(6.65MPa),与其他组相比差别具有显著性意义(P<0.05),该组铸件的表面粗糙度为(2.69±0.32)μm,扫描电镜观察显示,该组粘接断面发生在牙本质与粘结剂之间。结论:表面粗糙度对钛合金与牙本质之间的粘接强度有影响,表面粗糙度为(2.69±0.32)μm的钛合金与牙本质之间的粘接强度最大。OBJECTIVE： To compare the difference in bond strength between titanium alloy with different surface roughness and dentin. METHODS： Thirty titanium alloy cylindrical specimens were fabricated and randomized to 6 groups. All groups of specimens were rubbed separately with 60, 80, 100, 150, 240, and 320 grit silicon carbide （Si-C） sand paper. The surface roughness of each group was measured. The occlusal surfaces of 30 human molars freshly extracted within 1 month were flattened to expose an adequate area of lower dentin. The dentin bonding surface was produced using 320, 400, and 600 grit si-C sand paper, respectively. Titanium alloy and dentin specimens were bonded with KetacTM Cem Easymix ionomers. All bonded specimens were stored for 24 hours at 37℃. The microtensile bond strength was measured through the use of universal testing machine. The fractured surface of titanium alloy was observed under scanning electron microscopy. RESULTS： The titanium alloy group rubbed with 80 grit Si-C sand paper yielded the strongest bond strength, 6.65 MPa, compared with other groups （P 〈 0.05）. The surface roughness of titanium alloy in this group was （2.69±0.32） pm. Scanning electron microscopy results revealed that all fractured surfaces appeared at the interface of dentin and ionomer cement. CONCLUSION： The surface roughness could influence the bond strength between titanium alloy and dentin. Titanium alloy with （2.69±0.32） IJm surface roughness bonding to dentin showed the maximum bond strength.

关 键 词：表面粗糙度 钛合金 牙本质 粘接强度 

分 类 号：R318[医药卫生—生物医学工程]