摘要
目的:分析对比不同表面处理方法对牙本质粘接强度改变的影响,探讨不同牙本质表面处理方法与不同的粘接材料相匹配的关系。方法:实验于2001-03/05在中科院金属所实验室完成。选择新拔除成牛离体前牙77颗,用钻将唇面釉质磨去,磨平牙本质,制成10mm×8mm×5mm小块,随机分成3组,superbondC&B树脂组35颗,Glumabond树脂组35颗,电镜扫描观察组7颗。前2组在与树脂粘接前分成7个小组,每组n=5,以6种不同方法进行6组表面处理,1组空白对照不处理。电镜扫描观察组也以6种不同方法进行6颗表面处理,1颗空白对照不处理。按照6种不同表面处理方法后,superbondC&B树脂组制成牛牙粘接试样35个,Glumabond树脂组制成牛牙粘接试样35个。用MTS-858疲劳试验机,拉伸速度为1mm/min测试抗张粘接强度,扫描电镜组观察经上述处理后,牙本质表面的微观结构。结果:①在superbondC&B树脂组以100mL/L柠檬酸和30mL/L三氯化铁水溶液处理组抗张强度值最高,而在Glumabond树脂组以0.5mol/L乙二胺四乙酸二钠盐水溶液处理组后抗张强度最高,50mL/L次氯酸钠处理组和15mA微波处理组与蒸馏水对照组无显著性差异,25mA微波处理组和370mL/L磷酸处理组统计学上无差异。②扫描电镜下观察经不同表面处理的牙本质表面微观结构的变化各不相同,惟一相同的是牙本质表面都清洁。正常牙本质表面平整,牙本质小管口被碎屑堵塞,牙本质表面被污染层所覆盖,仅有个别的牙本质小管可以根据堵塞物与小管壁之间的微小裂隙分辨出其位置所在;牙本质表面经0.5mol/L乙二胺四乙酸二钠盐水溶液溶液处理后管间质平滑质密,牙本质小管管口的填塞物部分地被清除,管周牙本质层出现脱钙现象,部分牙本质小管口径轻度扩大;100mL/L柠檬酸和30mL/L三氯化铁溶液处理后牙本质小管口的填塞物全部被清除,管周牙本质脱钙,而使管径明显扩大,管周部�
AIM:To investigate the effect of various surface treatments on bond strength of dentin,and probe into the matching relationship of various surface treatments with different bond materials for dentin. METHODS:The experiment was conducted in the laboratory of Institute of Metal Research,Chinese Academy of Sciences from March to May 2001.Seventy- seven prem axillary teeth of adult cows were extracted to rub out the labial enamel with a drill and rub down dentin so as to cut into 10 mm × 8 mm× 5 mm loaves.These specimens were divided into super bond C& B resin group(n=35),Gluma bond resin group(n=35),scanning electron microscope group(n=7).Before bond using resin,the former two groups were both equally subdivided into 7 groups,among which 6 were treated with 6 various methods as 6 treatment groups,and the rest one with noth ing as blank control group.Six of 7 teeth in the scanning electron microscope gr oup were also treated with 6 methods as 6 treatment groups and the rest with not hing as the blank control group.After their separate 6 surface treatments,35 bon d specimens of cow dentin were made in the super bond C& B resin group and Glum a bond resin group.The bond strength of dentin in all the specimens were loaded in a MTS- 858 fatigue testing machine at tensile speed of 1 mm per minute.While ,the microcosmic structure changes of dentinal surface were observed in the scan ning electron microscope group. RESULTS:① The highest tensile strength in the super bond C& B resin group w as treated with 100 mL/L citromalic acid and 30 mL/L iron sesquichloride,and in the Gluma bond resin group was treated with 0.5 mol/L edathamil disodium salt so lution.The tensile strength in the 50 mL/L sodium hypochlorite group or 15 mA mi crowave treatment group were insignificantly different from that in the distille d water control group,and also statistically different between the 25 mA microwa ve treatment group and 370 mL/L phosphoric acid group.② Under scanning electron microscope,the surface treatments induce microcosmic c
出处
《中国临床康复》
CSCD
北大核心
2005年第18期83-85,i004,共4页
Chinese Journal of Clinical Rehabilitation
