표면처리방법에 따른 복합레진의 결합강도에 관한 실험적 연구
AN EXPERIMENTAL STUDY ON THE SHEAR BOND STRENGTHS OF COMPOSITE RESIN TO AIR-ABRADED ENAMEL AND DENTIN
신재호, 강나라, 한세현,
소속 상세정보
신재호 ( ) - 서울대학교 치과대학 소아치과학
강나라 ( ) - 서울대학교 치과대학 소아치과학
한세현 ( ) - 서울대학교 치과대학 소아치과학
KMID : 0358919970240010112
Abstract
결론
저자는 air-abrasion이 기존의 산부식의 필요성을 감소시키는지에 대하여 Bovine의 법랑
질과 상아질을 산부식군, air-abrasion군, air-abrasion후 산부식군으로 나누고 복합레진을
접착하여 전단결합강도 측정 및 주사 전자현미경 관찰 후 다음과 같은 결론을 얻었다.
1. 법랑질에 대해 air-abrasion후 산부식시킨 군이 가장 높은 전단결합강도를 나타내었으
나 산부식군과 유의한 차이는 없었다(p>0.05). Air-abrasion만 시행한 군이 가장 낮은 전단
결합강도를 나타내었으며, 다른 두 군과는 유의한 차이가 있었다(p<0.05).
2. 상아질에 대해 air-abrasion처리를 한 뒤 산부식시킨 군이 가장 높은 전단결합강도를
나타내었으나 산부식군과 유의한 차이는 없었다(p>0.05). Air-abrasion만 시행한 군이 가장
낮은 전단결합강도를 나타내었으며, 다른 두 군과 유의한 차이가 있었다(p<0.05).
3. 주사 전자현미경으로 관찰한 결과 air-abrasion으로 처리한 법랑질과 상아질 표면은 불
규칙적이고 거친 표면을 나타내었다.
#초록#
According to extensive use of composite resin which have superior esthetic property,
every effort on improving bonding strength between a tooth and composite resin has
been continued. Acid etching technique is a method that micro-etches the tooth surface
which provides bonding with composite resin possible. Recently, there were several
reports that mechanical treatment obtained from air-abrasion can provide similar bonding
strength with acid etching technique. So, this experimental study was designed to
compare the shear bonding strength between using air-abrasion technique and using
acid etching technique.
Initially, bovine teeth were divided into enamel and dentin experimental groups.
Respectively each group was categorized into three subgroup. One subgroup was acid
etched with 35% phosphoric acid, then bonded with composite resin. The other subgroup
was air-abraded with 50μm Al2O3 particles sprayed with
160psi air pressure using air abrasion unit, and composite rerin was bonded. In another
subgroup, composite resin was bonded after acid etching following air-abrasion. So,
enamel experimental groups were made of E1(acid etched only), E2(air-abraded only),
E3(acid etched following air-abraded), and dentin experimental groups were made of
D1(acid etched only), D2(air-abraded only), D3(acid etched following air-abraded). Each
subgroup had 10 specimens. Dentin bonding system and composite resin were applied on
treated surface using 5mm diameter gelatin capsule as manufacturer's direction. After
1200 times thermocycling between 5℃ and 55℃, shear bond strength was measured in
5mm/min crosshead speed with Instron and also treated enamel and dentin were
observed with SEM.
The following results were obtained. :
1. In the enamel experimental groups, acid etched following air-abraded group had
highest shear bond strength, but there was no significant difference compared to acid
etched group. Air-abraded only group had lowest shear bond strength, and there was
significant difference compared to the rest of groups.
2. In the dentin experimental groups, acid etched following air-abraded group had
highest shear bond strength, but there was no significant difference compared to acid
etched group. Air-abraded only group had lowest shear bond strength, and there was
significant difference compared to the rest of group.
3. In the SEM study, air-abraded enamel and dentin had irregular and rough surfaces.
키워드
shear bond strength; acid etching; air-abrasion;
원문 및 링크아웃 정보
등재저널 정보