Dyract 黏固粉的牙本质黏结强度
Dentin bond strength of Dyract Cem.
作者信息
Martin R, Paul S J, Lüthy H, Schärer P
机构信息
University of Zurich, Department of Fixed and Removable Prosthodontics and Dental Material Sciences, Switzerland.
出版信息
Am J Dent. 1997 Feb;10(1):27-31.
PURPOSE
To evaluate the influence of provisional cements and of a dentin bonding agent on the adhesion of a self-curing polyacid-modified resin composite (Dyract Cem) on pressurized human dentin.
MATERIALS AND METHODS
Freshly prepared dentin specimens of human teeth were perfused with physiologic saline. Three different types of surface treatment were evaluated. (1) Dyract Cem was applied to freshly prepared dentin without (Group 1.1) or with (Group 1.2) the respective dentin bonding agent (Prime & Bond 2.0) and cured. (2) Freegenol (Groups 2.1 and 2.2) or Temp Bond (Groups 2.3 and 2.4) were applied first on the dentin surface for 24 hours. Only then was Dyract Cem (with or without Prime & Bond 2.0) added onto the dentin after cleaning the dentin surface with pumice. 3) Prime & Bond 2.0 was applied first on the dentin surface and cured. Then Freegenol (Group 3.1) or Temp Bond (Group 3.2) were added for 24 hours. After cleaning with pumice, Prime & Bond 2.0 was applied for a second time on the dentin (= dual application) and finally Dyract Cem was added. As control, a conventional glass ionomer cement (Ketac-Cem Maxicap; Groups 4.1-4.3) was used in a similar way. After 1,500 thermal cycles with constant imitation of intrapulpal pressure, shear bond strengths were measured. Resulting shear bond strength values were displayed by means of a box plot and they were analyzed statistically by Mann-Whitney, Kruskal-Wallis or one way ANOVA tests.
RESULTS
Lowest and highest mean shear bond strength values were 0.27 +/- 0.42 MPa (Group 2.4; single use of Prime & Bond 2.0 with prior application of TempBond) and 5.84 +/- 3.36 MPa (Group 3.1; dual use of Prime & Bond 2.0 with intermediate application of Freegenol). A clearly significant difference between groups could only be found when a single or dual use of the dentin bonding agent Prime & Bond 2.0 were combined with either Freegenol (Groups 2.1, 2.2 and 3.1; Kruskal-Wallis: P < 0.01) or Temp Bond (Groups 2.3, 2.4 and 3.2; Kruskal-Wallis: P < 0.001) as additional dentin surface treatment.
目的
评估临时粘结剂和牙本质粘结剂对自固化聚酸改性树脂复合材料（Dyract Cem）在加压人牙本质上粘结力的影响。
材料与方法
用人牙新鲜制备的牙本质标本灌注生理盐水。评估了三种不同类型的表面处理。（1）将Dyract Cem应用于新鲜制备的牙本质，不使用（第1.1组）或使用（第1.2组）相应的牙本质粘结剂（Prime & Bond 2.0）并固化。（2）首先在牙本质表面应用Freegenol（第2.1组和第2.2组）或Temp Bond（第2.3组和第2.4组）24小时。然后仅在用浮石清洁牙本质表面后，将Dyract Cem（有或没有Prime & Bond 2.0）添加到牙本质上。3）首先在牙本质表面应用Prime & Bond 2.0并固化。然后添加Freegenol（第3.1组）或Temp Bond（第3.2组）24小时。用浮石清洁后，在牙本质上再次应用Prime & Bond 2.0（=双重应用），最后添加Dyract Cem。作为对照，以类似方式使用传统玻璃离子水门汀（Ketac-Cem Maxicap；第4.1 - 4.3组）。在持续模拟牙髓腔内压力进行1500次热循环后，测量剪切粘结强度。所得剪切粘结强度值通过箱线图展示，并通过Mann-Whitney、Kruskal-Wallis或单因素方差分析进行统计分析。
结果
最低和最高平均剪切粘结强度值分别为0.27±0.42 MPa（第2.4组；先用TempBond后单次使用Prime & Bond 2.0）和5.84±3.36 MPa（第3.1组；先用Freegenol中间使用Prime & Bond 2.0后双重使用）。仅当牙本质粘结剂Prime & Bond 2.0单次或双重使用并与Freegenol（第2.1组、第2.2组和第3.1组；Kruskal-Wallis检验：P < 0.01）或Temp Bond（第2.3组、第2.4组和第3.2组；Kruskal-Wallis检验：P < 0.001）作为额外的牙本质表面处理联合使用时，各组之间才存在明显显著差异。
Zotero 插件