[Determinations of the bonding strength with pressure in the same direction for two enamel adhesion techniques: self-etching and all-etching].
OBJECTIVE
To compare the shear strength of the self-etching techniques and the all-etching techniques for enamel adhesion and to provide evidence for the selection of different bonding methods in clinical practice.


METHODS
Ten middle incisors recently extracted were collected, each was cut into two parts following its sagittal axis, thus divide each tooth into two groups. For group 1 Single Bond 2 was used to bond Filtek Z250 resin to the teeth. For group 2, SE Bond was used to bond Filtek Z250 resin to the teeth. After that, according to the principle of pressing from the incisal margin to the cervix, the shear strength of each bonding unit was tested and statistically analyzed.


RESULTS
The shear strength of Single Bond 2 was significantly higher than that of SE Bond(P<0.01).


CONCLUSIONS
All-etching bonding system can provide higher shear strength for enamel bonding than that of self-etching bonding system. It is suggested that all-etching technique should be selected for dental restoration with resin.
Clinic Department, Peking University School and Hospital of Stomatology, Beijing 100034, China. quiz213@yahoo.con.cn
Qi
Q
Zhao
Shi-hua
SH
Xue
Zhi-yong
ZY
Liu
Ling-yun
LY
Wu
D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003743:Dental Enamel; D045662:Dental Etching / Q000379:methods*; D019279:Resin Cements; D033081:Shear Strength; D013314:Stress, Mechanical
D003188:Composite Resins; D019279:Resin Cements; C078484:Syntac dentine adhesive