글라스 아이오노머 시멘트의 표면처리방법에 따른 복합레진과의 전단결합강도에 관한 연구
A Study on the Shear Bond Strength of the Composite Resin to Glass Ionomer Cement According to Surface Treatment Methods of Glass Ionomer Cement
노봉환, 황호길, 유광성,
소속 상세정보
노봉환 ( ) - 조선대학교
황호길 ( ) - 조선대학교
유광성 ( ) - 조선대학교
KMID : 0362319950200010362
Abstract
The purpose of this study was to evaluate the shear bond strength between composite resin and glass ionomer cement according to surface treatment methods of glass ionomer cement. Sixty round acylinders were fabricated. And then, a round undercut
cavity(8mm diameter, 2.5mm depth) was prepared in the center of the every acrylic cylinder. After all cavities were restored by using light-cured glass ionomer cement.
A total of sixty acrylic cylinders restored with glass ionomer cement were divided into 4 groups according to surface treatment methods of glass ionomer cement.
The surface treatment of each group were as follows:
control group : no treatment
Group 1 : acid etching
Group 2 : sandblasting
Group 3 : air-podwer abrasive polishing
The composite resin was bonded to glass ionomer cement of each specimens. And the shear bond strength was tested with a universal testing machine at a cross-head speed of 1mm/min and 500kg in full scale.
@ES The results were as follows:
@EN 1. The sandblasting group(group2) had the highest shear bond strength with 272.50±24.96kg/cm2 and the acid etching group(group 1) had the lowest shear bond strength with 192.89±29.32kg/cm2.
2. The no treated group(control group) had higher shear bond strength than acid etching group (group 1) (p<0.05).
3. The sandblasting group(group 2), air-powder abrasive polishing group(group 3) and no treated group(control group) had higher shear bond strength than the acidetching group(group 1) (p<0.05).
4. The sandblasting group(group 2) and air-powder abrasive polishing group(group 3) had higher shear bond st3rength than the no treatment group(control group), but there was not significant(p>0.05).
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