비귀금속 합금의 표면 처리와 접착제에 따른 상아질의 결합특성
EFFECTS OF SANDBLASTING OF BASE METAL ALLOY ON THE SHEAR BOND PROPERTIES TO DENTIN SURFACE
이용근, 이성재,
소속 상세정보
이용근 ( ) - 원광대학교
이성재 ( ) - 원광대학교 치과대학
KMID : 0362219980250020141
Abstract
결론
1. 주조한 금속을 600 번 사포로 연마한 경우의 결합강도는 5.143∼11.698 MPa, 알루미나
로 분사연마한 경우에는 5.888∼17.609 MPa, 글라스 입자로 분사연마 한 경우에는
2.997-10.084 MPa이었다.
2. 주조횟수와 무관하게 FJT를 접착제로 사용한 경우 알루미나로 분사연마한 경우의 상
아질 전단결합강도가 600 번 사포로 연마만 한 경우보다 유의하게 높았으나, GIC, HCB 및
PAN을 접착제로 사용한 경우에는 차이가 없었다.
3. 주조횟수와 무관하게 글라스 입자로 분사연마한 경우의 결합강도는 600번 사포로 연마
만 한 경우와 차이가 얼었다.
4. 주조횟수에 의한 차이는 Fff 또는 PAN을 접착제로 사용하고 알루미나로 분사연마한
경우에서 유의한 결합강도의 차이를 보였다.
Many factors can influence on the bond characteristics between the alloys for dental
appliances and teeth. Primary factors that can influence on the bonding is alloy type,
alloy surface conditions including the surface roughness, bond enhancing primers and the
type of adhesives. Many researches were performed on the chemical bonding mechanism
of adhesive resin cement, however, micromechanical retention mechanism is basically
used. Sandblasting method is widely used to make alloy surface rough, and factors such
as the type of blasting particles(alumina or glass), blasting pressure, blasting time and
the distance between the nozzle and the target can change the alloy surface conditions
after blasting. Repeated casting of dental base metal alloys can result in the change of
casting body by the vaporization of lower melting point element metal, and these
changes can influence on the bonding characteristics of this casting body with
chemically bonding adhesives.
The purpose of this study was to determine the shear bonding characteristics of a
dental cobalt-chromium alloy to the dentine surface after various alloy surface treatment
with four kinds of adhesives.
The alloys for bonding test were divided into two groups, one was cast 1 ∼3 times,
and the other was cast 5∼7 times. Three kinds of surface treatment of alloys were
performed, polished with #600 sandpaper, blasted with 50micron alumina particles or 50
micron glass particles. These alloy specimens were bonded to human dentine with
adhesives of resin-modified glass ionomer cement(FJT), glass ionomer cement(GIC),
polycarboxylate cement(HCB) and adhesive resin cement(PAN). The effects of ultrasonic
cleaning of alloy specimens after blasting were also determined. Shear bonding
characteristics were measured after storage in 37℃ distilled water for 24 hours after
bonding. Universal testing machine(Zwick 1456 Z020, Germany) was used, and the
cross-hand speed was 0.5mm/min. From the load-deflection curves obtained, shear bond
strength, strain at bond failure, work up to bond failure and elastic modulus ratio was
calculated. Elastic modulus ratio was the ratio of the slope of the linear portion of
load-deflection curve to that of the PAN bonded, alumina blasted and ultrasonic cleaned
group.
From this experiment, the following results were obtained.
1. The shear bond strength of the group of polished with #600 sandpaper was 5.143∼
11.698 MPa, that of aumina blasted group was 5.888∼17.609 MPa, and that of glass
blasted group was 2.997∼10.084 MPa.
2. In the FJT bonded group, regardless of the number of casting, the shear bond
strength of alumina blasted group was significantly higher than that of sandpaper
polished group. However in each of the GIC, HCB and PAN bonded group, the shear
bond strength of sandpaper polished group and that of alumina blasted croup was not
significantly different.
3. Regardless of the number of casting and cement type, there was no significant
difference in the bond strength between the sandpaper polished group and glass blasted
group.
4. The shear bond strength of alumina blasted group bonded with the adhesive of
FJT or PAN showed significant between the depending on the number of casting.
키워드
Base metal alloy; Resin-modified glass ionomer; Sandblasting; Shear bond strength;
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