摘要
目的:研究空气喷砂对不同材料冠修复(镍铬烤瓷和钴铬合金)表面粗糙度的影响。方法:对12颗镍铬烤瓷和12颗钴铬合金进行冠修复。对于钴铬合金组,将抛光糊剂涂布在其表面,并用机械驱动抛光轮进行精加工。同时,收集正畸患者拔除的12对尖牙(4mm×4mm)作为对照组。对3组样本进行空气喷砂后,使用Rugosimeter评价样本的表面粗糙度。结果:空气喷砂前后3组样本的表面粗糙度之间存在显著性差异(P<0.05)。对照组及镍铬烤瓷组的表面粗糙度较喷砂前分别提高了1.31和1.88倍(P<0.05),而钴铬合金组在空气喷砂前后其表面粗糙度无明显变化(P>0.05)。结论:空气喷砂可增加牙釉质和镍铬烤瓷的表面粗糙度,而钴铬合金在空气喷砂前后表面粗糙度无明显变化,该材料可适用于空气喷砂处理。
Objective：To study the air abrasion on surface roughness of crown restoration with different materials（Ni-Cr porcelain and Co-Cr alloy）.Methods：Twelve Ni-Cr porcelain and twelve Co-Cr alloy test specimens were made for crown restoration.For the group of Co-Cr alloy,apolishing paste was applied on the surface and the finishing operation is performed by a mechanically driven polishing wheel.Meanwhile,twelve bicuspids（4mm ×4mm）were collected from patients who underwent orthodontics as control.Air abrasion was applied for three groups.The surface roughness for all specimens was evaluated using Rugosimeter.Results：There were significant differences（P〈0.05）between the surface roughness of the three groups before and after the air abrasion.After air abrasion,the surface roughness of control and Ni-Cr porcelain groups were in-creased by 1.31-folds（P〈0.05）and 1.88-folds（P〈0.05）,respectively,but the surface roughness of Co-Cr alloy group did not significantly changed after air abrasion（P〉0.05）.Conclusion：Air abrasion can increase the surface roughness of enamel and Ni-Cr porcelain,but not in Co-Cr alloy.Co-Cr alloy was the suitable material for air abrasion.
出处
《武汉大学学报（医学版）》
CAS
北大核心
2014年第5期754-756,共3页
Medical Journal of Wuhan University
关键词
空气喷砂
冠修复
镍铬烤瓷
钴铬合金
表面粗糙度
Air Abrasion Crown Restoration Ni-Cr Porcelain Co-Cr Alloy Surface Roughness
