방사선 불투과성 치과용 아크릴릭 레진의 개발
DEVELOPMENT OF RADIOPAQUE DENTAL ACRYLIC RESINS
이용근, 이건일, 이성재,
소속 상세정보
이용근 ( ) - 원광대학교 치과대학
이건일 ( ) - 원광대학교 치과대학
이성재 ( ) - 원광대학교 치과대학
KMID : 0362219970240020313
Abstract
요약
1. SGL을 30% 전후 첨가하면 방사선 불투과도와 굴곡탄성계수는 첨가이전보다 유의하게
증가하고(P<0.05), 굴곡강도와 비커스경도는 첨가이전과 차이가 없는 방사선 불투과성 레진
의 개발이 가능할 것으로 보인다.
2. GLA을 첨가한 경우 첨가비율이 높아지면 굴곡강도가 첨가이전보다 유의하게 낮아졌으
며(p<0.05), 경도도 낮아졌다. 열중합형 레진에 첨가하는 경우 비커스경도도 감소하였다.
3. TPB를 열중합형 레진에 첨가한 경우에는 굴곡강도와 미세경도가 유의하게 감소하였다
(p<0.05). 이 결과로 보아 열중합형 레진에는 부적합한 방사선불투과성 물질로 여겨진다.
4. TIO는 방사선 불투과도를 유의하게 증가시키고(p<0.05), 물성에는 큰 영향이 없지만
레진의 반투명도를 증가시켜서 심미성이 필요한 레진에는 부적합한 방사선불투과성 물질로
보인다.
Aspiration or ingestions of fragments of dental appliances are common occurrences. If
they have proper radiopacity, their localization in and progress through the
gastrointestinal tract or trachea can be more effective. To make radiopaque dental
acrylic resin, many radiopaque materials, such as iodide compound, magnesium oxide,
silver alloy, bismuth compound or barium compound were added into dental acrylic
resins. However the results were not so satisfactory as to be used clinically.
The purpose of this study was to develop a radiopaque dental acrylic resin, which has
clinically detectible radiopacity with minimal changes of mechanical and esthetic
properties. The radiopacity, color change(CIE △E), transverse strength, modulus of
rupture and Vickers hardness of acrylic resins were determined after mixing radiopaque
glass(SiO2 50%, BaO 30%, B2O3 10% and
Al2O3 10%) of 10∼50 wt%, silane coated radiopaque glass of
10∼50 wt%, triphenyl bismuth of 5∼20% or titanium oxide of 10%. The specimens
were thermocycled in 5 and 55 ℃ distilled water for 1,000 times, after then the
radiopacity, color change and Vickers hardness were re-measured.
The radiopacity of specimens on the X-ray films was measured with Photoshop
program with a film scanner. The color change was determined with differential
colorimeter(Model TC-6FX, Tokyo Denshoku, Japan), and the Vickers hardness was
measured with microhardness tester(Mitsuzawa, Japan). The flexural strength and
modulus of rupture were determined using the Universal Testing Machine(Zwick 1456,
Z020, Germany) with the cross head speed of 5 ㎜/min.
The follcwing results were obtained :
1. After mixing silage coated radiopaque glass about 30 wt%. the radiopacity and
modulus of rupture increased significantly(p<0.05), however the flexural strength and
Victkers hardness did not changed significantly(p>0.05) compared to unmodified dental
acrylic resins. So, this composition can be used as a successful radiopaque dental acrylic
resin.
2. After mixing radiopaque glass, the flexural strength decreased significantly as the
mixing ratio of glass increased(p<0.05). Also the Vickers hardness decreased after
mixing in the case of heat cured dental acrylic resins.
3. After mixing triphenyl bismuth, the flexural strength and Vickers hardness
decreased significantly in the case of heat cured dental acrylic resins(p<0.05).
4. After mixing titanium dioxide, the radiopacity increased significantly(p<0.05), and
mechanical properties did not change significantly(p>0.05). However, translucency
decreased definitely.
키워드
dsntal acrylic resin; radiopacity; radiopaque glass; triphenyl bismuth;
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