Quantitative contribution of resin infiltration/hybridization to dentin bonding.
Quantitative contribution of resin infiltration/hybridization to dentin bonding.
复制标题
树脂渗透/杂交对牙本质粘合的定量贡献。
DOI：
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发表时间：
1993
影响因子：
1.4
通讯作者：
A. Gwinnett
中科院分区：
文献类型：
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作者：
A. Gwinnett
本研究定量地确定了树脂渗透在牙本质粘结中的作用。四组包含10颗磨牙。在中冠区域对30个牙进行切片，并用600粒度的碳化硅纸将牙本质磨平。第一组：涂抹层完好;第二组：用Prophy Jet去除玷污层;第3组：用10%H3PO4处理20秒;第4组：由横向、中冠状骨折暴露的牙本质组成。牙本质表面用All-Bond 2（其伴随粘结剂）处理，然后用P50树脂复合物以1 mm增量聚合。在37 ℃的水中储存24小时后，以5 mm/分钟的十字头速度在剪切模式下测试组件的破坏。使用SEM表征表面和界面形态。MPa值为：组1：10.24 +/- 2.98;组2：20.37 +/- 4.62;组3：32.68 +/- 7.12;组4：26.77 +/- 4.85。方差分析和t检验显示，平均值有统计学差异（P < 0.05）。由于仅在第4组的牙本质小管中发现明显的树脂渗透，在第3组中发现小管和管间渗透，因此得出结论，树脂渗透可以贡献该总蚀刻系统的剪切粘结强度的约三分之一。
This study determined, quantitatively, the role of resin infiltration in dentin bonding. Four groups contained 10 molar teeth. Thirty were sectioned in the mid-coronal region and the dentin ground flat with 600 grit silicon carbide paper. Group 1: smear layer intact; Group 2: smear layer removed with a Prophy Jet; Group 3: conditioned with 10% H3PO4 for 20 seconds; Group 4: comprised dentin exposed by a transverse, mid-coronal fracture. Dentin surfaces were treated with All-Bond 2, its companion bonding agent, followed by P50 resin composite, polymerized in 1 mm increments. After storage in water at 37 degrees C for 24 hours, the assemblies were tested to failure in a shear mode at a crosshead speed of 5 mm/minute. Surface and interfacial morphology was characterized using SEM. Values in MPa were: Group 1: 10.24 +/- 2.98; Group 2: 20.37 +/- 4.62; Group 3: 32.68 +/- 7.12; and Group 4: 26.77 +/- 4.85. ANOVA and student t-test showed the means statistically different (P < 0.05). Since resin penetration was only found appreciably in dentin tubules in Group 4 and tubular and intertubular penetration in Group 3, it was concluded that resin infiltration can contribute approximately one third of the shear bond strength of this total etch system.