복합레진 수복 후 Bonding agent와 Sealant의 표면도표가 미세누출에 미치는 영향
THE EFFECT OF SUPERFICIAL APPLICATION OF BONDING AGENT AND SEALANT ON MICROLEAKAGE OF COMPOSITE RESIN RESTORATION
김종필, 최병재, 윤중호,
소속 상세정보
김종필 ( ) - 연세대학교 치과대학 소아치과학
최병재 ( ) - 연세대학교 치과대학 소아치과학
윤중호 ( ) - 연세대학교 치과대학 소아치과학
KMID : 0358919930200010265
Abstract
결론
저자는 발거된 건전한 소구치 90개를 선택하여 치은 변연부가 백악-법랑질 경계부 하방
에 위치하도록 5급와동을 형성한 후 P-50R 구치부용 레진으로 충전한 군을대
조군으로 하고 bonding agent와 sealant를 표면도포한 후와, 또한 치솔질 마모를 시킨후에
치은변연부의 미세누출 정도를 Basic fuschin를 이용한 색소 침투법으로 측정하여 다음과
같은 결론을 얻었다.
1. 와동의 치은 변연부 경계가 상아질이나 백악질상에 위치한 경우, 레진 중합반응 후에
치은 변연부에 상당량의 색소침투가 있었고 치솔질을 시행한 후에는 더욱 증가하였다.
2. 레진 중합반웅 후 발생한 치은 변연부 미세누출이 Bonding agent와 sealant를 표면에
도포한 군에서, 온도변화만 시킨경우, 대조군에 비해 현저히 감소되었으며 통계학적 유의차
가 있었다(p<0.01).
3. Bonding agent 도포군과 sealant 도포군 사이의 미세누출 감소효과는 통계학적 유의차
가 없었다.
4. 온도변화와 치솔질을 시행한 후에, Bonding agents와 sealant를 표면도포한 군에서 대
조군에 비해 미세누출 감소효과가 있었고 통계학척 유의차가 있었다(p<0.01)
이상의 실험결과로 볼 때 레진중합 후 생긴 치은 변연부에서의 미세누출은 Bonding
agent와 sealant를 표면에 도포하여 수축 틈내로 침투시킨 뒤 중합반응 시키는 방법으로 상
당량 감소되었으므로 임상적으로 미세누출에 의한 이차 우식중이나 치수병변을 예방하는데
효과적일 것이라고 생각된다. 그러나 치솔질에 의한 레진과 표면도포제의 마모손실 때문에
장기간에 걸쳐 변연누출 감소효과가 지속될 수 있을는지에 대해서는 앞으로 더 많은 연구가
필요할 것으로 사료된다.
#초록#
Class V cavities, with their gingival margins located below memento-enamel junction,
were prepared on 90 healthy premolars that were extracted for orthodontic purpose ;
After 35% phosphoric acid etch and ScotchprepR, Scotchbond
2R were applied, p-50R posterior composite resin were placed
at all the cavities.
The samples were divided into six groups and each group is consist of fifteen teeth.
In experiment 1), control group with resin filling only was compared to the experimental
groups with additional application of bonding agent and sealant on composite resin
surface. The experimental groups were thermocycled 55 times between 5℃ and 55℃.
In experiment 2), the same procedure as in experiment 1) was carried out and the
specimens were brushed 500 times under the load of 500g/cm2 with
abrasion tester.
All the specimens were, then, stained with basic fuschin solution, and microleakage
was measured with stereomicroscopy.
The following results were obtained :
1. When the gingival margin of the cavity is placed on dentin or cementum, dye
penetration was increased at the gingival margin after resin curing ; brushing procedure
shoves this phenomenon.
2. Microleakage after the resin curing in the groups with additional application of
bonding agent and sealant with thermocycling only was more reduced significantly than
control group ; there was statistically significance(P<0.01).
3. There was no differance in reducing effect of microleakage between the bonding
agent-applied group and sealant-applied group.
4. The experimental groups to which bonding agent and sealant were applied after
thermocycling and brushing showed microleakage reducing effect and there was
statistically significance (P<0.01).
As a result, it can be concluded that microleakage at gingival margin, that was
created after resin curing, can be significantly reduced by surperscial application and
curing of bonding agent and sealant.
Clinically, such utilization of bonding agent and sealant would be effective in
prevention of secondary caries and pulp disease, which are the results of microleakage.
Nevertheless, whether the microleakage reducing effect can last long under the
abrasive action of brushing is still open to doubt, and there is a necessity for striding
further.
키워드
microleakage; bonding agent; sealant;
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