상아질 표면상태에 따른 광중합형 글래스아이오노머 시멘트의 전단결합강도에 관한 연구
A STUDY ON THE SHEAR BOND STRENGTH OF LIGHT CURED GLASS IONOMER CEMENTS TO CONTAMINATED DENTIN
김경화, 박상진,
소속 상세정보
김경화 ( ) - 경북대학교 의과대학 간호학과
박상진 ( ) - 경북대학교 의과대학 간호학과
KMID : 0362319970220020609
Abstract
The purpose of this study was to evaluate the shear bond strength of three
light-cured glass ionomer cements to blood contaminated bovine. The materials used in
this study were Fuji II LC, Dyract and Variglass VLC. The dentin conditioners were
10% polyacrylic acid, 10% maleic acid and 10% phosphoric acid.
180 lower anterior bovine teeth were selected in this study. The teeth were embedded
in acrylic resin and were grounded with 320 to 600 grit silicon carbide paper to create a
flat dentin surface. The teeth were divided into six groups. The experimental procedures
in six groups were as follows; Group 1(GF) : Samples bonded to dentin surface with
Fuji II LC after 10% polyacrylic acid treatment,
Group 2(BFG) : Samples bonded to dentin surface with Fuji II LC after 10% polyacrylic
acid treatment and blood contamination.
Group 3(MD) : Samples bonded to dentin surface with Dyract after 10% maleic acid
treatment.
Group 4(BMD) : Samples bonded to dentin surface with Dyract after 10% maleic acid
treatment and blood contamination.
Group 5(PV) : Samples bonded to dentin surface with Variglass VLC after 10%
Phosphoric acid treatment.
Group 6(BPV) : Samples bonded to dentin surface with Variglass VLC after 10%
Phosphoric acid treatment and blood contamination.
Group 1,3 and 5 were classified into the control groups, while group 2, 4 and 6 were
classified into the experimental groups. Each group contained 30 samples.
After 24 hours water storage at 37℃, all samples were subjected to a shear load to
fracture at a cross head speed of 1.0 mm/min with Instron universal testing
machine(No. 4467). Debonded surfaces were observed under Scanning Electron
Microscope(Hitachi S-2300) at 20kvp. The data were evaluated statistically at the 95%
confidence level with Student's t-test.
The following results obtained; 1. Shear bond strengths were higher in the control
groups(1,3,5 group) than in the experimental groups(2,4,6 group).
2. The shear bond strength of group 5(PV) was the highest in the control groups, and
the group 5 was significantly higher than the group 1(GF) on the shear bond strength.
3. The group 4(BMD) was the highest on the shear bond strength, and the group
2(BGF) was the lowest in the experimental groups. The group 4(BMD) and 6(BPV)
showed a significant difference with the group 2 on the shear bond strength.
4. All the groups showed an adhesive-cohesive failure, except the group 2(BGF)
showing adhesive failure.
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