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도재시편을 투과한 가시광선이 복합레진 중합에 미치는 영향에 관한 실험적 연구
AN EXPERIMENTAL STUDY ON THE EFFECT OF THE VISIBLE LIGHT THROUGH THE PORCELAIN DISC ON THE CURING OF THE COMPOSITE RESIN

대한소아치과학회지 1991년 18권 1호 p.173 ~ 183

이제호, 정재용,

소속 상세정보

이제호 ( ) - 연세대학교 치과대학 치과방사선학교실
정재용 ( ) - 연세대학교 치과대학 소아치과학교실

KMID : 0358919910180010173

Abstract

결 론
Porecelain laminate disc를 통과한 빛의 조사시간이 복합레진의 중합에 미치는 영향을 평
가하기 위해 가시광선 중합형 hybrid 복합레진인 CHOICE를 사용하여 시편의 높이를 lmm,
2mm, 3mm로 하고 도재시편의 두께를 0.5mm, 1mm로 한 후 가시광선을 30초, 60초, 90초
조사하여 각 조합마다 3개의 시편씩 총 81개 복합레진 시편의 상부면과 하부면의 표면경도
를 측정한 결과 다음의 결론을 얻었다.
1. 도재는 가시광선의 투과를 저해하며 도재의 두께가 증가할수록 복합레진의 표면경도 및
중합깊이는 유의성있게 감소하였다.
2. 가시광선의 조사시간이 증가할수록 복합레진의 표면경도 및 중합깊이는 유의성있게 증
가하였다.
3. 가시광선을 90초간 조사하여도 모든 군에서 표면으로부터 3mm깊이의 복합레진은 중합
되지 않았다.
4. 복합레진의 표면경도와 1mm하부의 경도차이는 광선조사시간이 중가할수록 감소하였다.
5. 임상에서 Porcelain laminate veneer술식 시행시 복합레진의 충분한 중합을 얻기 위해서
는 최소 90초이상의 가시광선 조사가 필요할 것으로 사료된다.
#초록#
The purpose of this study was to evaluate the effect of the of the visible through the
porcelain disc on the curing of the composite resin.
Round porcelain discs 10 mm in diameter were processed in two thicknesses ; 0.5 mm
and 1 mm, and black plastic molds 6.5 mm in inner diameter were prepared in three
heights ; 1 mm, 2 mm and 3 mm.
A mold was placed on the glass plate and pressure filled with composite resin ( hybrid
type CHOICE porcelain adhesive paste, shade A1, Bisco Dental Product Co. ).
In experimental group, a celluloid strip was placed over the composite resin and a
porcelain disc was placed on the top. The composite resin specimens were cured with
visible light curing unit using exposure time of 30, 60 and 90 seconds.
In control group, only celluloid strip was placed over the composite resin and cured
with visible light curing unit using given three different exposure time.
The variables of the porcelain disc thickness, the exposure time and specimen height
produced total 81 specimens.
After the visible light exposed, the surface Knoop hardness number of each composite
resin specimen was measured on both sides(top and bottom).
Results of this study were as follows ;
1. The porcelain disc diminished the degree of the visible light transmission and as the
thickness of porcelain disc increased, the surface hardness and curing depth of the
composite resin specimen decreased with statistical significance.
2. As the exposure time of the visible light increased, the surface hardness and curing
depth of the composite resin specimen increased with statistical significance.
3. Even though the exposure time of the visible light was 90 seconds, the bottom
surface of 3 mm height composite resin specimen was not cured.
4. As the exposure time of the visible light increased, the difference of top surface
hardness and 1 mm bottom surface hardness was reduced.
5. In clinical situation of the porcelain laminate technique, it is supposed that at least
90 seconds of visible light exposure time is necessary to obtain the adequate curing of
the composite resin.