아말감의 표면처리에 따른 복합레진과의 전단결합 강도에 관한 연구
A STUDY ON THE SHEAR BOND STRENGTH OF THE COMPOSlTE RESlN TO AMALGAM ACCORDlNG TO AMALGAM SURFACE TREATMENT METHODS
박문희, 유광성, 이동근,
소속 상세정보
박문희 ( ) - 조선대학교
유광성 ( ) - 조선대학교
이동근 ( ) - 조선대학교
KMID : 0362319930180010114
Abstract
The purpose of this study was to evaluate the effect on treatment methods to shear bond strength between composite resin and amalgam when the alloy surface was finished with a diamond wheel or an sandblaster.
Forty round acrylic cylinders were fabricated with a diameter of 33mm and a height of 20mm to fit into the device used during shear bond strength testing. A round undercut cavity (diameter, 8mm : depth, 2.5mm) was prepared in the center of the
acrylic
surface and the cavity was restored using a amalgam.
A total of 40 acrylic cylinders with amalgam were divided into 4 groups according to treatment method.
@ES The group treatment were as follows:
@EN Group 1: and etching after finishing the amalgam with diamond wheel
Group 2: no acid etching after finishing the amalgam with diamond wheel
Group 3: acid etching after sandblasting the amalgam
Group 4: no acid etching after sandblasting the amalgam
The shear bond strength of composite resin bonded to amalgam of each specimen was tested with a universal testing machine at a crosshead speed of 0.5mm/min and 500kg in full scale
@ES The results were as follows:
@EN 1. After diamond finishing the non-acid etching group had highest shear bond strength with 7.29kg/cm* and after sandblasting the acidetching group had lowest shear bond strength with 4.49kg/cm*
2. In both diamond finishing and sandblasting group, acid etching of the roughened amalgam surface decreased the shear bond strenght.
3. The group treated with a diamond wheel had higher shear bond strength those treated with an sandblaster but there was not significant.
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