할로겐, 플라즈마 그리고 2세대 고강도 LED 광중합기를 이용하여 치면열구전색제를 중합하는 과정에서 산소 차단 용액인 glycerin gel($DeOx^{(R)}$)의 도포, 질소가스와 탄산가스를 분사시켜 공기 중 산소와의 접촉을 차단시킨 후 산소억제층의 두께, 치면열구전색제의 중합률 그리고 표면경도를 측정, 평가하였다. 각각의 제작된 시편을 HPLC에서 역상크로마토그래피를 이용하여 미반응 모노머 TEGDMA의 용출양을 측정하여 중합률을 평가하였고, Vickers hardness tester를 이용하여 표면미세경도를 측정, 광학현미경을 이용하여 산소억제층의 두께를 측정하여 다음과 같은 결과를 얻었다. 1. 질소 및 탄산가스를 분사하면서 중합한 군, $DeOx^{(R)}$를 도포한 후 중합한 군 모두 공기 중에서 중합한 군보다. TEGDMA 용출량이 감소되었다(p<0.05). 2. 할로겐 광으로 20초간 중합한 경우 $DeOx^{(R)}$를 도포한 군과 질소 및 탄산가스를 분사한 군의 TEGDMA 용출량은 유사하였지만(p>0.05), 40초로 중합한 경우 탄산가스 분사군이 질소가스 분사군보다 TEGDMA 용출량이 적었다(p<0.05). 3. 플라즈마 광으로 10초간 중합한 경우 $DeOx^{(R)}$를 도포한 군의 TEGDMA 용출량이 가장 적었고(p<0.05), 탄산가스 분사군이 질소가스 분사군보다 용출량이 적었다(p<0.05). 4. LED 광원에서는 탄산가스 분사군이 질소가스 분사군보다 TEGDMA의 용출량이 적었다(p>0.05). 5. 세 광원 공히 공기 중에서 중합한 군보다 산소를 차단한 상태에서 중합한 군에서 미세경도가 크게 나타났다(p<0.05). 6. $DeOx^{(R)}$로 처리했을 때 플라즈마 광 10초와 LED광 20초 중합군이 할로겐 광 40초 중합군보다 미세경도 값이 높았고, 질소가스와 탄산가스 분사하에서 플라즈마 광으로 10초간 중합한 경우와 LED 광으로 20초간 중합 한 경우가 할로겐 광으로 40초간 중합한 경우 보다 높은 미세경도 값을 보였다(p<0.05). 7. 세 광원 모두 공기 중에서 중합한 군에 비해 질소 및 탄산가스 분사를 분사하면서 중합한 군 $DeOx^{(R)}$를 도포한 후 중합한 군이 산소억제층의 두께가 평균 49%의 감소되었으며(p<0.05), 이들 산소를 차단한 군 간의 유의차는 없었다.
할로겐, 플라즈마 그리고 2세대 고강도 LED 광중합기를 이용하여 치면열구전색제를 중합하는 과정에서 산소 차단 용액인 glycerin gel($DeOx^{(R)}$)의 도포, 질소가스와 탄산가스를 분사시켜 공기 중 산소와의 접촉을 차단시킨 후 산소억제층의 두께, 치면열구전색제의 중합률 그리고 표면경도를 측정, 평가하였다. 각각의 제작된 시편을 HPLC에서 역상크로마토그래피를 이용하여 미반응 모노머 TEGDMA의 용출양을 측정하여 중합률을 평가하였고, Vickers hardness tester를 이용하여 표면미세경도를 측정, 광학현미경을 이용하여 산소억제층의 두께를 측정하여 다음과 같은 결과를 얻었다. 1. 질소 및 탄산가스를 분사하면서 중합한 군, $DeOx^{(R)}$를 도포한 후 중합한 군 모두 공기 중에서 중합한 군보다. TEGDMA 용출량이 감소되었다(p<0.05). 2. 할로겐 광으로 20초간 중합한 경우 $DeOx^{(R)}$를 도포한 군과 질소 및 탄산가스를 분사한 군의 TEGDMA 용출량은 유사하였지만(p>0.05), 40초로 중합한 경우 탄산가스 분사군이 질소가스 분사군보다 TEGDMA 용출량이 적었다(p<0.05). 3. 플라즈마 광으로 10초간 중합한 경우 $DeOx^{(R)}$를 도포한 군의 TEGDMA 용출량이 가장 적었고(p<0.05), 탄산가스 분사군이 질소가스 분사군보다 용출량이 적었다(p<0.05). 4. LED 광원에서는 탄산가스 분사군이 질소가스 분사군보다 TEGDMA의 용출량이 적었다(p>0.05). 5. 세 광원 공히 공기 중에서 중합한 군보다 산소를 차단한 상태에서 중합한 군에서 미세경도가 크게 나타났다(p<0.05). 6. $DeOx^{(R)}$로 처리했을 때 플라즈마 광 10초와 LED광 20초 중합군이 할로겐 광 40초 중합군보다 미세경도 값이 높았고, 질소가스와 탄산가스 분사하에서 플라즈마 광으로 10초간 중합한 경우와 LED 광으로 20초간 중합 한 경우가 할로겐 광으로 40초간 중합한 경우 보다 높은 미세경도 값을 보였다(p<0.05). 7. 세 광원 모두 공기 중에서 중합한 군에 비해 질소 및 탄산가스 분사를 분사하면서 중합한 군 $DeOx^{(R)}$를 도포한 후 중합한 군이 산소억제층의 두께가 평균 49%의 감소되었으며(p<0.05), 이들 산소를 차단한 군 간의 유의차는 없었다.
The purpose of this study was to evaluate the efficacy of blocking the oxygen in the air during the polymerization of sealant. All curing were performed with various light curing units under the application of oxygen gel barrier, stream of nitrogen and carbon dioxide gas for inhibition of oxygen dif...
The purpose of this study was to evaluate the efficacy of blocking the oxygen in the air during the polymerization of sealant. All curing were performed with various light curing units under the application of oxygen gel barrier, stream of nitrogen and carbon dioxide gas for inhibition of oxygen diffusion into sealant surface. The results of present study can be summarized as follows : 1. The amount of eluted TEGDMA form the specimens cured with all the three different light units in the stream of $N_2$ and $CO_2$ gas and application of Oxygen gel barrier($DeOx^{(R)}$) were significantly lower than in the room-air atmosphere (Control) (p<0.05). 2. In the $DeOx^{(R)}$ application, the amount of eluted TEGDMA the specimen cured with PAC light for 10seconds was less than that cured in the stream of $N_2$ and $CO_2$ atmospheric conditions (p<0.05) 3. In the LED using 10 or 20sec irradiation times under the stream of $N_2$ and $CO_2$, the eluted TEGDMA showed to be no statistically significant difference (p>0.05). 4. The microhardness from the specimens cured with all the three different light units under each treated conditions were significantly higher than in the room-air atmosphere (p<0.05). 5. The surface treatment by $DeOx^{(R)}$, $N_2$ and $CO_2$ reduces the thickness of oxygen inhibited layer by sp proximately 49% of the untreated control value.
The purpose of this study was to evaluate the efficacy of blocking the oxygen in the air during the polymerization of sealant. All curing were performed with various light curing units under the application of oxygen gel barrier, stream of nitrogen and carbon dioxide gas for inhibition of oxygen diffusion into sealant surface. The results of present study can be summarized as follows : 1. The amount of eluted TEGDMA form the specimens cured with all the three different light units in the stream of $N_2$ and $CO_2$ gas and application of Oxygen gel barrier($DeOx^{(R)}$) were significantly lower than in the room-air atmosphere (Control) (p<0.05). 2. In the $DeOx^{(R)}$ application, the amount of eluted TEGDMA the specimen cured with PAC light for 10seconds was less than that cured in the stream of $N_2$ and $CO_2$ atmospheric conditions (p<0.05) 3. In the LED using 10 or 20sec irradiation times under the stream of $N_2$ and $CO_2$, the eluted TEGDMA showed to be no statistically significant difference (p>0.05). 4. The microhardness from the specimens cured with all the three different light units under each treated conditions were significantly higher than in the room-air atmosphere (p<0.05). 5. The surface treatment by $DeOx^{(R)}$, $N_2$ and $CO_2$ reduces the thickness of oxygen inhibited layer by sp proximately 49% of the untreated control value.
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문제 정의
The aim of this study was to investigate the effect of oxygne inhibition on the polymerization of sealant cured with different light-curing units. The amount of TEGDMA of each specimens were analyzed by HPLC and the surface microhardness was measured by Vicker s hardness tester.
However, application of DeOx® will extend step of treatment and spreading of this on teeth surface is difficult to clinical application due to mobile character of material. Therefore, this paper propose that the stream of N2 and CO2 gas may be beneficial effect in clinical application due to similar results in reduction of oxygen inhibited layer.
가설 설정
1. The amount of eluted TEGDMA form the specimens cured with all the three different light units in the stream of N2 and CO2 gas and application of Oxygen gel barrier (DeOx®) were significantly lower than in the room-air atmosphere(Control) (p<0.05).
7. The microhardnesses of the specimens cured for 40sec with QTH light, lOsec with PAC light and 20sec with LED curing light under each atmosphere conditions were similar and no statistical difference.
9. The surface treatment by DeOx®, N2 and CO2 reduces the thickness of oxygen inhibited layer by approximately 49% of the untreated control value.
제안 방법
This study will give help to develop clinical approach in the reduction of the oxygen inhibited layer and the increase of microhardness, but the pressure and amount of N2 and CO2 gas will be adjusted in clinical application.
대상 데이터
The visible light-curing pit and fissure sealant (Ultraseal XT plus™, Ultradent, USA) was used in this study. The quart tungsten halogen(QTH) unit(XL3000™, 3M ESPE, USA), the plasma-arc curing(PAC) unit(Flipo™, LOKKI, France) and the second generation light emitted diode(LED) units(Elipar FreeLight II™, 3M/ESPE, Germany) were used for polymerization of pit and fissure sealant in standard mode.
데이터처리
The amount of TEGDMA of each specimens were analyzed by HPLC and the surface microhardness was measured by Vicker s hardness tester. Data were analyzed by means of ANOVA.
The data were analyzed by means of ANOVA and Tukey post hoc test. The values of p<0.
성능/효과
2. The amount of eluted TEGDMA form specimens cured with QTH light for 40seconds in Air/CO2 conditions was most lowest, but there was no statistically significant difference comparing to DeOx® treated group.
3. In the DeOx® application, the amount of eluted TEGDMA the specimen cured with PAC light for lOseconds was less than that cured in the stream of N2 and CO2 atmospheric conditions(p(0.05).
4. In the LED using 10 or 20sec irradiation times under the stream of N2 and CO2, the unreacted TEGDMA showed to be no statistically significant difference(pe0.05), whereas, the specimens applied with DeOx® showed the lowest release of TEGDMA in the all test group(p<0.05).
5. With QTH light curing, microhardness of the specimens irradiated for 40sec in the stream of CO2 was higher than that in the room-air atmosphere (p<0.05). Otherwise, with PAC light curing for lOsec, there was no statistical difference among tested groups.
6. With LED light curing, values for 20sec in the stream of CO2 and application of DeOx® were higher than that in the room-air atmosphere (p<0.05).
In this study, it is shows that the stream of CO2 is more effective in the reduction of unreacted TEGDMA and the increase of surface microhardness than that of N2 and air atmospheric conditions. The reason might that CO2 is heavier than air and can be easily maintained in a surface of resin, without much loss.
05). The specimens included application of DeOx® showed the lowest release of eluted TEGDMA among all groups(p<0.05).
When the DeOx® was applied, these for lOsec with PAC light and 20sec with LED light was significantly lower than that cured for 40sec with QTH light. When the N2 and CO2 was blow, the specimens cured for lOseconds with PAC light, for 20seconds with LED light and for 40seconds with QTH light were showed to be no statistically significant difference. These study consistent with previous results that the high power curing light, PAC light and second-generation LED light could be obtained the optimal polymerization of resin restoration26-291.
05). Whereas, when the specimens were photopolymerized with the LED curing light using 10 or 20seconds irradiation times under the stream of N2 and CO2, the amount of unreacted TEGDMA showed to be no statistically significant difference (p>0.05). The specimens included application of DeOx® showed the lowest release of eluted TEGDMA among all groups(p<0.
후속연구
However, application of DeOx® will extend step of treatment and spreading of this on teeth surface is difficult to clinical application due to mobile character of material. Therefore, this research will give help to develop clinical approach in the reduction of the oxygen inhibited layer and the increase of microhardness, but the pressure and amount of N2 and CO2 gas will be adjusted in clinical application.
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