CAJ | 학술논문

目的:采用一种新的界面处理方法,对不同类型牙本质粘接剂的粘接强度与界面形态进行研究.方法:选取人无龋磨牙,暴露咬合面牙本质,分别使用3 种粘接剂(Single Bond,SB;Clearfil SE Bond,SE;Clearfil S3 Bond,S3)制备粘接样本.粘接样本切割成粘接界面约为0.9 mm×0.9 mm的柱形小条,用微拉伸测力仪测试粘接强度(n=15).另外将粘接样本依次用6 mol/L盐酸、5%次氯酸钠和0.08 mg/ml透明质酸酶溶液处理,扫描电镜观察粘接界面形态.结果: 3 种粘接剂的牙本质粘接强度分别为:SB (35.50±6.40) MPa,SE (45.06±5.29) MPa,S3 (30.46±3.82) MPa,三者之间差异具有统计学意义(P<0.05).SB粘接界面的树脂突长约9～12 μm,部分样本出现混合层易与粘接剂层分离.SE形成的树脂突长约9～14 μm,无混合层与粘接剂层分离现象.使用S3后,树脂突稀疏,长约4～7 μm,混合层与粘接剂层结合紧密.结论:牙本质粘接剂的粘接界面形态与粘接强度存在一定的相关性.
목적:채용일충신적계면처리방법,대불동류형아본질점접제적점접강도여계면형태진행연구.방법:선취인무우마아,폭로교합면아본질,분별사용3 충점접제(Single Bond,SB;Clearfil SE Bond,SE;Clearfil S3 Bond,S3)제비점접양본.점접양본절할성점접계면약위0.9 mm×0.9 mm적주형소조,용미랍신측력의측시점접강도(n=15).령외장점접양본의차용6 mol/L염산、5%차록산납화0.08 mg/ml투명질산매용액처리,소묘전경관찰점접계면형태.결과: 3 충점접제적아본질점접강도분별위:SB (35.50±6.40) MPa,SE (45.06±5.29) MPa,S3 (30.46±3.82) MPa,삼자지간차이구유통계학의의(P<0.05).SB점접계면적수지돌장약9～12 μm,부분양본출현혼합층역여점접제층분리.SE형성적수지돌장약9～14 μm,무혼합층여점접제층분리현상.사용S3후,수지돌희소,장약4～7 μm,혼합층여점접제층결합긴밀.결론:아본질점접제적점접계면형태여점접강도존재일정적상관성.
Objective: To evaluate bond strength and interface of various dentin adhesives by a modified interface processing method. Methods:Nine extracted human molars were ground to expose fresh dentin surface. Three dentin adhesives (Single Bond, Clearfil SE Bond and Clearfil S3 Bond) were applied respectively and a block of composite resin was built up. The specimens were then stored in distilled water for 24 h at 37 ℃ and sectioned into beams of 0.9 mm×0.9 mm cross-sectional area. The microtensile bond strength was determined with Microtensile Tester(n=15). In addition, the bonding specimens were conditioned with 6 mol/L HCl, 5% NaOCl and 0.08 mg/ml hyaluronidase to observe the adhesive interfaces by SEM. Results: Significant differences in bond strength were observed among the three adhesives(P<0.05): SE Bond (45.06±5.29) MPa> Single Bond (35.50±6.40) MPa> S3 Bond (30.46±3.82) MPa. Single Bond showed resin tags about 9-12 μm long and gaps between hybrid and adhesive layers. No obvious boundary between hybrid layer and adhesive were observed for both SE Bond and S3 Bond, while the length of resin tags were 9-14 μm and 4-7 μm for SE Bond and S3 Bond respectively. Conclusion:The morphology of the bond interface of dentin adhesive has a relationship with the bond strength.