Experimental study on bond strength of machinable composite resin and dentin with three kinds of resin cements
10.3760/cma.j.issn.1002-0098.2009.01.013
- VernacularTitle:三种树脂粘接剂对可切削复合树脂与牙本质粘接强度的比较研究
- Author:
Xue-Bing YAN
1
;
Yong WANG
;
Gang ZHENG
;
Pei-Jun L(U)
Author Information
1. 北京大学口腔医学院口腔医院
- Keywords:
Shear strength;
Dentin-bonding agents;
Machinable composite resin
- From:
Chinese Journal of Stomatology
2009;44(1):46-49
- CountryChina
- Language:Chinese
-
Abstract:
Objective To examine the shear and microtensile bond strength between a newly developed dental machinable composite resin(pelymethylmecrylate/nano SiO2-ZrO2,PNSZ)and dentin cemented using three resin luting systems and to select the most suitable one.nethods The shear and microtensile bond strength between the machinable composite resin and dentin cemented using three resin luting systems(Group A:RelyX ARC,Group B:Panavia-F,Group C:Variolink II)were tested.The broken specimens were observed with a stereomicroscope(×50)to compare their failure modes. Results In the shear tests,no significant difierence was found in bond strength among Group A[(14.07±4.67)MPa],Group B[(13.17±4.63)MPa]and Group C[(12.10±2.18)MPa](P＞0.05).In the microtensile tests,no significant difference was found in bond strength among Group A[(11.49±4.90)MPa],GroupB[(9.66±4.15)MPa].and Group C[(10.11±4.20)MPa](P＞0.05).The failure modes of all the three resin cements were predominantly adhesive failures at the dentin/cement interface.Conclusions The three typos of resin cements showed similar results in bend strength between the dental machinable composite resin and dentin.Bonding at the resin/cement interface was stronger than that at the dentin/cement interface.
