표면 처리방법에 따른 복합레진의 미세누출에 관한 실험적 연구
A STUDY ON MICROLEAKAGE OF COMPOSITE RESIN AFTER SURFACE TREATMENT
이창우, 김수경, 이상훈,
소속 상세정보
이창우 ( ) - 서울대학교 치과대학 소아치과학교
김수경 ( ) - 서울대학교 치과대학 소아치과학교
이상훈 ( ) - 서울대학교 치과대학 소아치과학교
KMID : 0358919980250010103
Abstract
결 론
저자는 air-abrasion 술식이 기존의 산부식의 필요성을 감소시킬 수 있는지 알아보기 위
하여 치아표면에 와동을 형성하고 air-abrasion, 산부식, 혼합처리 (air-abrasion+acid
etching)한 후 두가지 종류의 bonding agent를 적용하고 복합레진으로 충전하여 미세누출을
측정한 후 다음과 같은 결론을 얻었다.
1. 실험군간의 미세누출 비교에서 air-abrasion만 시행한 군인 1군과 4군은 2, 3, 5. 6군에
비해 미세누출이 컸으며 통계학적으로 유의성있는 차이를 보였다(p<0.05). 그러나, 1군 과 4
군 사이에는 통계학적으로 유의한 미세누출의 차이가 없었고(p>0.05), 2, 3, 5, 6군 사이에서
도 통계학적으로 유의한 미세누출의 차이가 없었다(p>0.05).
2. 표면처리방법간의 미세누출 비교에서 air-abra-zion군은 acid etching군이나
combination(air-abration + acid etching)군에 비해서 미세누출이 컸으며 통계학적으로 유의
한 차이를 보였다(p<0.05). combination(air-abrasion + acid etching)군이 acid etching군보
다는 미세누출이 적었지만 통계학적으로 유의한 차이가 없었다(p>0.05).
3. Bonding agent간의 미세누출비교에서 Scotchbond Multi-Purpose군(1,2,3군)과 All
Bond 2 군(4, 5 ,6군)사이에는 통계학적으로 유의한 미세누출의 차이가 없었다 (p>0.05).
#초록#
Adhesion of composite resin to tilth structure has been of tremendous significance in
clinical dentistry. Due to the lack of adhesion between composite restorative resins and
enamel and dentin, microleakage occurs ,at the tooth/restoration interface. This may lead
to discoloration, secondary caries, marginal breakdown, postoperative sensitivity, and
even pulpal pathology. According to extensive use of composite resin. every effort on
improving bonding strength and reducing microleakage between a tooth and composite
resin has been continued. This study was conducted to determine the difference in
microleakage in enamel and dentin treated with air-abrasion, acid etching and
combination when restored with composite resin.
Class Ⅴ cavities were prepared on 30 premolars. The specimens were divided into
following groups.
group 1 :air-abrasion+Scotchbond Multi-purpose group 4 :air-abrasion+ All-Bond 2
group 2:acid etching+Scotchbond Multi-purpose group 5:acid etching + All-Bond 2
group 3 :combination+Scotchbond Multi-purpose group 6 :combination + All-Bond 2#
combination : air-abrasion + acid etching
The specimens were filled with Z-100 after application of Scotchbond Multi-purpose
and All-Bond 2. Thermocycling was conducted by alternately dipping the specimens in
5℃ and 55℃ water for 30 seconds 500 times. 1% methylene blue was applied and the
specimens were left for 24 hours at 37℃. After washing out the dye, the tooth was
sectioned bucolingually along the axis. The sectioned surface was observed with
stereoscope for dye penetration.
The author has measured the microleakage in teeth prepared with air-abrasion, acid
ethching and combination to study the difference in microleakage following different
methods of tooth surface treatment and has come to following results.
1. In comparing microleakage between groups, group 1 and 4 showed statistically
significant difference from group 2, 3, 5 and 6(p<0.05). There was no significant
difference among group 2, 3, 5, 6(p>0.05) nor between group 1 and 4(p>0.05).
2. In comparing microleakage among tooth surface treatment methods, Air-abrasion
group showed significantly more microleakage than acid etching group and combination
(air-abrasion + acid etching) group(p<0.05). Combination(acid etching+air-abrasion) group
tended to show lesser microleakage than acid etching group, but this was not
statistically significant (p>0.05).
3. In comparing microleakage between bonding agents. there was no statistically
significant difference between Scotchbond Multi-purpose and All-Bond 2 (p>0.05).
키워드
Microleakage; acid etching; Air-abrasion; composite resin; Bonding agent;
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