(An) investigation on the characterization of composite resin polymerized by the use of an argon ion laser
Authors
조현경
Issue Date
1992
Description
치의학과/박사
Abstract
[한글]
전치부에 주로 사용하는 복합 레진이 최근에는 구치부에까지 확대 적용됨에 따라 물리적 성질의 향상이 요구되어 온바, 본 실험에서는 Argon 이온 레이저를 이용하여 광중합 레진을 중합시켜, 물성 변화를 관찰하고자 하였다.
이에 가시광 램프를 30초간 조사한 군을 대조군으로 하고 Argon 이온 레이저에 있어서는 300mW, 500mW, 1700mW의 출력과, 10초, 20초, 30초의 조사시간으로 나누어 압축강도, 간접인장강도, 경화깊이 및 깊이별 미세경도를 측정하고 발거된 20개의 소구치 협면 또는
설면에 제5급 와동을 형성하여 P-50을 충전, 가시광 램프(30sec)와 Argon 이온 레이저 (1W, 5sec)를 각각 조사하여 중합시킨뒤 변연 접합성을 주사전자 현미경으로 관찰하여 다음과 같은 결론을 얻었다.
1. 압축 강도는 대조군인 가시광 램프 조사군에 비해 Argon 이온 레이저로 조사한 모든 군에서 더 높은 강도를 나타냈으며(P<0.05) 1000mW 10초 군에서 가장 높았다.
2. 간접인장강도는 대조군에 비해 Argon 이온 레이저 조사군이 더 높았다(P<0.001).
3. 경화 깊이는 대조군인 가시광 램프 조사군에 비해 Argon 이온 레이저 조사군 모두에서 더 깊게 나타났으며(P<0.001), 1000mW, 30sec군에서 가장 높았다.
4. 깊이별 미세경도는 대조군에 비해 Argon 이온 레이저 조사군에서 더 크게 나타났으며(P<0.05), laser조사군에서는 심부에서도 경도가 크게 감소되지 않았다.
6. 가시광 램프로 광증합 레진을 경화시킨 경우보다 단일파장의 빛인 레이저로 경화시킨 경우에서 증합효율이 더 높았고, 압축강도, 간접인장강도, 경도에 있어서도 더 크게 나타났으므로 Argon 이온 레이저에 의한 중합방법이 가시광 램프에 의한 중합방법보다 더
우수하였다.
AN INVESTIGAT10N ON THE CHARACTERIZATION OF COMPOSITE RESIN POLYMERIZED BY THE USE
OF AN ARGON ION LASER
Hyung Kyung Cho, D.D.S., M.S.D.
Department of Dental Science, Graduate School, Yonsei University
(Directed by Professor Chung Suck Lee, D.D.S., Ph.D.)7
An experimental investigation of the physical properties of light curing
composite resin P-50 was performed, in which an argon ion laser beam was
irradiated. The physical and mechanical properties of laser polymerized composite
resin were determined by measuring the compressive strength, diametral tensile
strength, curing depth and microhardness depending upon the experimental conditions
such as the laser irradiation time(10sec, 20sec, 30sec) and laser power(300mW,
500mW, 1000mW).
These observations were compared with a conventional visible light curing
technique. In addition, to evaluate the marginal adaptation, Class V cavity was
prepared on the buccal or lingual surface of the extracted premolar and filled with
P-50 light curing resin. The test samples were irradiated with both light sources
so that the interface between the restoration and the tooth structure were observed
under scanning electron microscope.
The most of physical and mechanical properties of the laser cured resin showed a
remarkable improvement than those treated with the conventional light source, while
the observations with the scanning electron microscope provided no significant
difference for two polymerized sources. From the results in the experiment it
appears that the potential of an argon ion laser is o( important value of the use
in the polymerization of composite resin.
[영문]
An experimental investigation of the physical properties of light curing composite resin P-50 was performed, in which an argon ion laser beam was irradiated. The physical and mechanical properties of laser polymerized composite resin were determined by measuring the compressive strength, diametral tensile strength, curing depth and microhardness depending upon the experimental conditions such as the laser irradiation time(10sec, 20sec, 30sec) and laser power(300mW, 500mW, 1000mW).
These observations were compared with a conventional visible light curing technique. In addition, to evaluate the marginal adaptation, Class V cavity was prepared on the buccal or lingual surface of the extracted premolar and filled with P-50 light curing resin. The test samples were irradiated with both light sources so that the interface between the restoration and the tooth structure were observed under scanning electron microscope.
The most of physical and mechanical properties of the laser cured resin showed a remarkable improvement than those treated with the conventional light source, while the observations with the scanning electron microscope provided no significant
difference for two polymerized sources. From the results in the experiment it appears that the potential of an argon ion laser is o( important value of the use in the polymerization of composite resin.