[Effect of different treatments of dentin surface on sheer bond strength between different bonding agents and dentin].
OBJECTIVE
To evaluate the effect of Zinc oxide-eugenol cement and Gluma desensitizer on the sheer bond strength of three kinds of dentin bonding agents. The three dentin bonding agents were Zinc phosphate cement, Glass ionomer cement and Super-Bond C&B. To find the theory depending for the using of different protective methods and the selecting of different kinds of dentin bonding agents in prepared abutment teeth.


METHODS
The buccal surfaces of ninety freshly extracted human premolars were flattened to expose an adequate area of lower dentin. Followed by wet-grinding on a series of silicon carbide paper from number 320, 400, 600 grit to produce the dentin bonding surface. The teeth roots were embedded in self-curing resin with the crown out of the resin. The embedded ninety teeth were divided randomly into three groups. The group A was control and the dentin surfaces were not treated. The group B was covered with a paste of Zinc oxide-eugenol cement. The group C was covered with Gluma desensitizer. Calculating the sheer strength between three bonding agents and dentin after the two treatments of dentin surface. The results were statistically assessed with SPSS software. Dentin surfaces were observed with scanning electron microscope (SEM).


RESULTS
The sheer bond strengths of Zinc phosphate cement had significant decrease (P<0.05), especially the C1 group. The sheer bond strengths of Glass ionomer cement and Super-Bond C&B had no significant difference.


CONCLUSIONS
Zinc oxide-eugenol cement and Gluma desensitizer could reduce the sheer bond strength of Zinc phosphate cement with dentin surface. Zinc oxide-eugenol cement and the Gluma desensitizer could not effect Glass ionomer cement and the Super-Bond C&B with dentin.
Han
Xiao-Yan
XY
Department of Prosthodontics, Affiliated Hospital of Taishan Medical College, Taian 271000, China.
Zhu
Hong-Shui
HS
Liu
Qiu-Yue
QY
D001896:Boron Compounds; D003442:Crowns; D001840:Dental Bonding; D003804:Dentin; D017220:Dentin-Bonding Agents; D005976:Glutaral; D006801:Humans; D008689:Methacrylates; D008768:Methylmethacrylates; D019279:Resin Cements; D015035:Zinc Oxide-Eugenol Cement
D001896:Boron Compounds; D017220:Dentin-Bonding Agents; D008689:Methacrylates; D008768:Methylmethacrylates; D019279:Resin Cements; D015035:Zinc Oxide-Eugenol Cement; C111486:gluma desensitizer; C040201:Super C resin; C049495:Super-bond; D005976:Glutaral