基牙预备体表面粗糙度及水门汀配伍选择对粘接强度的影响

发布时间：2018-02-10 20:14

  本文关键词： 牙修复体 表面粗糙度 牙体预备 水门汀 粘接强度 旋转器械　出处：《天津医药》2014年01期 　论文类型：期刊论文

【摘要】：目的研究固定修复中预备体表面粗糙度及不同水门汀材料对粘接强度的影响,为临床备牙旋转器械及水门汀的选择提供参考依据。方法制作牙本质试件60个,随机均分为A、B、C 3组,分别采用3种粒度(125、60、28μm)的金刚砂车针进行牙体预备。各组随机抽取2个预备体试件,扫描电镜下行微观形貌观察;剩余18个试件经表面粗糙度测量后均分为3个亚组,分别采用聚羧酸锌水门汀(ZP),玻璃离子水门汀(GI)以及树脂改良型玻璃离子水门汀(RMGI)将钴铬合金金属铸件粘接于预备体表面,测定剪切粘接强度,并记录断裂的类型。结果 A、B、C 3组试件表面粗糙度及粘接强度均依次降低;3种水门汀材料中,RMGI粘接强度最高,ZP与GI粘接强度差异无统计学意义;不同配伍亚组中,A-RMGI亚组粘接强度最高,B-RMGI亚组次之,C-ZP、C-GI亚组最低;表面粗糙度与水门汀种类两因素之间不具有交互作用;A组断裂模式以Ⅰ、Ⅱ型为主,B组各断裂模式分布较为均衡,而C组以Ⅱ、Ⅲ型断裂模式居多。结论预备体表面粗糙度与粘接强度有关;3种水门汀材料中RMGI粘接效果最好;表面粗糙度与水门汀种类间不存在配伍优选情况。
[Abstract]:Objective to study the effect of surface roughness and different cement materials on bonding strength in fixed prosthesis, and to provide reference for the selection of dental rotary instruments and cement. Methods 60 dentin specimens were made. They were randomly divided into two groups. The teeth were prepared with three kinds of carborundum needle (125U 6028 渭 m). Two specimens were randomly selected from each group, and the morphology was observed by scanning electron microscope (SEM). The remaining 18 specimens were divided into three subgroups after surface roughness measurement. The cobalt and chromium alloy castings were bonded to the surface of the prepared body by polycarboxylate zinc cement (ZPX), glass ionomer cement (Gi) and resin modified glass ionomer cement (RMGI), respectively. Results the surface roughness and adhesion strength of the specimens in group A BX C 3 were decreased in turn, and the highest adhesion strength of RMGI was decreased in turn. There was no significant difference between ZP and GI in the bonding strength of the three cement materials. Among the different compatibility subgroups, the adhesion strength of the A-RMGI subgroup was the highest and that of the B-RMGI subgroup was the lowest, and there was no interaction between the surface roughness and the type of cement. The fracture patterns of group A were mainly type 鈪，

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