[Comparative study of 4 types of luting cements on shear bond strength of Zirconia ceramics to dentin].
OBJECTIVE
To investigate the adequate luting cements for zirconia ceramics to dentin.


METHODS
Blocks of sintered zirconia ceramics were randomly divided into 4 groups with 8 slices in each. After saliva immersion,airborne-particle abraded ceramic specimens were cleaned with phosphoric acid gel(containing 35% phosphoric acid) and then bonded to dentin with these four kinds of luting cements. After preserved in 37 degrees centigrade distilled water for 24 hours, the shear bonding strength of these specimens was tested and the data was analyzed with SPSS12.0 software package.


RESULTS
The Multilink Automix could attain the highest shear bonding strength and the 3M RelyXTM Unicem AplicapTM could attain higher shear bonding strength, which were both significantly higher than in the Tokuso Ionomer and Shofu Polycarboxylate Cement groups(P<0.05).


CONCLUSIONS
Total etching resin luting cement is an ideal option to the bonding of zirconia ceramics and can provide a strong bonding.
Yin
Bao-di
BD
Department of Prosthodontics, School of Stomatology, Wenzhou Medical College, Wenzhou 325027, Zhejiang Province, China. yinbaodi@126.com
Zhang
Xian-fang
XF
Zheng
Hu
H
Han
Dong-wei
DW
D002516:Ceramics; D001840:Dental Bonding; D003739:Dental Cementum; D003776:Dental Porcelain; D003804:Dentin; D005899:Glass Ionomer Cements; D006801:Humans; D019279:Resin Cements; D033081:Shear Strength; D015040:Zirconium
D005899:Glass Ionomer Cements; D019279:Resin Cements; D003776:Dental Porcelain; D015040:Zirconium; C028541:zirconium oxide