本文關(guān)鍵詞： 牙修復(fù)體 表面粗糙度 牙體預(yù)備 水門汀 粘接強(qiáng)度 旋轉(zhuǎn)器械　出處：《天津醫(yī)藥》2014年01期 　論文類型：期刊論文

【摘要】：目的研究固定修復(fù)中預(yù)備體表面粗糙度及不同水門汀材料對(duì)粘接強(qiáng)度的影響,為臨床備牙旋轉(zhuǎn)器械及水門汀的選擇提供參考依據(jù)。方法制作牙本質(zhì)試件60個(gè),隨機(jī)均分為A、B、C 3組,分別采用3種粒度(125、60、28μm)的金剛砂車針進(jìn)行牙體預(yù)備。各組隨機(jī)抽取2個(gè)預(yù)備體試件,掃描電鏡下行微觀形貌觀察;剩余18個(gè)試件經(jīng)表面粗糙度測(cè)量后均分為3個(gè)亞組,分別采用聚羧酸鋅水門汀(ZP),玻璃離子水門汀(GI)以及樹脂改良型玻璃離子水門汀(RMGI)將鈷鉻合金金屬鑄件粘接于預(yù)備體表面,測(cè)定剪切粘接強(qiáng)度,并記錄斷裂的類型。結(jié)果 A、B、C 3組試件表面粗糙度及粘接強(qiáng)度均依次降低;3種水門汀材料中,RMGI粘接強(qiáng)度最高,ZP與GI粘接強(qiáng)度差異無(wú)統(tǒng)計(jì)學(xué)意義;不同配伍亞組中,A-RMGI亞組粘接強(qiáng)度最高,B-RMGI亞組次之,C-ZP、C-GI亞組最低;表面粗糙度與水門汀種類兩因素之間不具有交互作用;A組斷裂模式以Ⅰ、Ⅱ型為主,B組各斷裂模式分布較為均衡,而C組以Ⅱ、Ⅲ型斷裂模式居多。結(jié)論預(yù)備體表面粗糙度與粘接強(qiáng)度有關(guān);3種水門汀材料中RMGI粘接效果最好;表面粗糙度與水門汀種類間不存在配伍優(yōu)選情況。
[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，

本文編號(hào)：1501339