연구목적: 복합레진의 광중합 전후에 일어나는 색과 투명도 변화를 측정하고, CQ의 함량을 정량하였으며, 광중합 전후 복합 레진의 굴절률을 측정해 이들의 상관 관계를 알아보고자 하였다. 연구 재료 및 방법: Esthet-X, Filtek supreme, Gradia Direct, Clearfil Majesty, Beautifil II에 대하여 Colorimeter NF999를 이용하여 광중합 전후의 색과 투명도를 각각 측정하고, GC-MS를 이용해 각 복합레진의 CQ 함량을 측정하였으며, spectroscopic ellipsometer를 이용해 광중합 전후의 굴절률을 측정하였다. 결과: 투명도는 광중합 후에 증가하였고, body shade에서 opaque shade보다 투명도 차이가 크게 나타났다. 모든 레진에서 body shade의 CQ 함량이 opaque shade의 CQ 함량보다 높았다. 굴절률은 광중합 후에 모든 레진에서 증가하였으며, body shade와 opaque shade간에 굴절률의 변화는 유의한 차이가 있었다. 결론: 광중합 후에는 복합레진의 색과 투명도가 상당한 차이를 나타낸다. 따라서 임상에서 direct shade matching을 시행할 때는 중합된 레진을 사용하여야 한다.
연구목적: 복합레진의 광중합 전후에 일어나는 색과 투명도 변화를 측정하고, CQ의 함량을 정량하였으며, 광중합 전후 복합 레진의 굴절률을 측정해 이들의 상관 관계를 알아보고자 하였다. 연구 재료 및 방법: Esthet-X, Filtek supreme, Gradia Direct, Clearfil Majesty, Beautifil II에 대하여 Colorimeter NF999를 이용하여 광중합 전후의 색과 투명도를 각각 측정하고, GC-MS를 이용해 각 복합레진의 CQ 함량을 측정하였으며, spectroscopic ellipsometer를 이용해 광중합 전후의 굴절률을 측정하였다. 결과: 투명도는 광중합 후에 증가하였고, body shade에서 opaque shade보다 투명도 차이가 크게 나타났다. 모든 레진에서 body shade의 CQ 함량이 opaque shade의 CQ 함량보다 높았다. 굴절률은 광중합 후에 모든 레진에서 증가하였으며, body shade와 opaque shade간에 굴절률의 변화는 유의한 차이가 있었다. 결론: 광중합 후에는 복합레진의 색과 투명도가 상당한 차이를 나타낸다. 따라서 임상에서 direct shade matching을 시행할 때는 중합된 레진을 사용하여야 한다.
Objectives: The aim of this study was to evaluate the optical characteristics such as color and translucency changes before and after light curing, to quantify the CQ and to measure refractive indices of body and opaque shade of resin composites materials. Materials and Methods: Resin composites use...
Objectives: The aim of this study was to evaluate the optical characteristics such as color and translucency changes before and after light curing, to quantify the CQ and to measure refractive indices of body and opaque shade of resin composites materials. Materials and Methods: Resin composites used in this study were A2 body and A2 opaque shade of Esthet-X, Filtek supreme, Gradia Direct, Clearfil Majesty and Beautifil II. Color and translucency changes before and after light curing were evaluated by colorimeter, the CQ was quantified by GC-MS and refractive index changes were measured by spectroscopic ellipsometer. Results: Translucency parameter (TP) was significantly increased after curing. The CQ content of body shades are higher than that of opaque shades in all resin composites. Refractive index increased after polymerization in all materials and significant difference in ${\Delta}$refractive index was found between body and opaque shade (significance level 0.05). Conclusions: For an accurate shade match, direct shade matching of resin composite should be performed by using the cured material.
Objectives: The aim of this study was to evaluate the optical characteristics such as color and translucency changes before and after light curing, to quantify the CQ and to measure refractive indices of body and opaque shade of resin composites materials. Materials and Methods: Resin composites used in this study were A2 body and A2 opaque shade of Esthet-X, Filtek supreme, Gradia Direct, Clearfil Majesty and Beautifil II. Color and translucency changes before and after light curing were evaluated by colorimeter, the CQ was quantified by GC-MS and refractive index changes were measured by spectroscopic ellipsometer. Results: Translucency parameter (TP) was significantly increased after curing. The CQ content of body shades are higher than that of opaque shades in all resin composites. Refractive index increased after polymerization in all materials and significant difference in ${\Delta}$refractive index was found between body and opaque shade (significance level 0.05). Conclusions: For an accurate shade match, direct shade matching of resin composite should be performed by using the cured material.
* AI 자동 식별 결과로 적합하지 않은 문장이 있을 수 있으니, 이용에 유의하시기 바랍니다.
가설 설정
9. ΔRefractive index of Clearfil Majesty is the greatest and that of Gradia Direct is the smallest in body and opaque shade both.
제안 방법
The technique employed in this study generated considerable data to evaluate color and translucency change before and after light curing. One of the advantages of the technique is that the CIELAB parameters on the 2 backings before and after light curing can be obtained from the same specimen in order to make the paired data. As a result, in this study, statistical analysis of color and TP change before and after light curing became possible.
The aim of this study was to evaluate the optical characteristics such as color and translucency changes before and after light curing, to quantify the CQ and to measure refractive indices of body and opaque shade of resin composites materials.
The technique employed in this study generated considerable data to evaluate color and translucency change before and after light curing. One of the advantages of the technique is that the CIELAB parameters on the 2 backings before and after light curing can be obtained from the same specimen in order to make the paired data.
095 %p/p.28These authors evaluated different brands of resin composites, comparing the results between microfilled and conventional filled composite, with no reference to the resin shade used. The same happened in the study performed by Taira et al.
21 Therefore, direct shade matching using uncured resin paste seemed inadequate for these products. This study has highlighted the fact that, in order to get a precise shade match, direct shade matching of these materials should be performed by using the cured composite.
대상 데이터
Resin composites used in this study were A2 body and A2 opaque shade of Esthet-X, Filtek supreme, Gradia Direct, Clearfil Majesty and BeautifilⅡ. Color and translucency changes before and after light curing were evaluated by colorimeter, the CQ was quantified by GC-MS and refractive index changes were measured by spectroscopic ellipsometer.
The materials (Table 1) selected for this study were five resin composites: Esthet-X (Dentsply, USA), Filtek supreme (3M ESPE, USA), Gradia Direct (GC Corporation, Japan), Clearfil Majesty Esthetic (Kuraray, Japan), and Beautifil Ⅱ (Shofu, Japan). As the name of the same opaque shades vary in different products, for simplicity, the A2O, OA2, AO2 and A2D shades were given the generic name “A2O” in this study.
The white and black backings employed in this study were a white ceramic tile (L* = 90.43, a* = -0.3, b* = 0.04) and a black ceramic tile (L*= 10.86, a*= -2.03, b*=2.42).
데이터처리
One-way ANOVA, two-way ANOVA, Tukey's post-hoc test and t-test were used for statistic analysis.
The L*, a* b* changes and ΔE* before and after light curing were evaluated using one-way ANOVA and Tukey's post-hoc tests to detect statistically significant differences between groups (significance level 0.05).
To detect any statistical changes in TP and refractive index before and after light curing, as primary factors, two-way ANOVA and Tukey's post-hoc test were carried out regarding products/shades and before or after light curing.
When this analysis revealed interaction of any of the primary factors, one-way ANOVA and Tukey's post-hoc tests were employed to detect statistically significant differences between groups (significance level 0.05).
성능/효과
1. When comparing the L* and b* before and after light curing, significant differences were detected and b* showed a significant decrease in all materials. Significant difference was detected in Δb* between body shades and opaque shades.
2. The ΔE* of body shade was significantly greater compared to that of opaque shade except for the Clearfil Majesty.
3. Translucency parameter (TP) was significantly increased after curing. The ΔTP of body shades are greater than that of opaque shades.
5. Refractive index increased after polymerization in all materials and significant difference in Δ refractive index was found between body and opaque shade (p < 0.05).
후속연구
However, the effect of the underlying opaque shade on the resultant color of a layered restoration remains to be known. Therefore, more detailed studies should be conducted to clarify how the opaque shade affects the color of the layered restorations.
참고문헌 (39)
Yap AU, Tan KB, Bhole S. Comparison of aesthetic properties of tooth-colored restorative materials. Oper Dent 1997;22:167-172.
Park SJ, Lee HY, Na MY, Chang HS, Hwang YC, Oh WM, Hwang IN. The evaluation of color and color difference according to the layering placement of Incisal shade composites on the body composites of the indirect resin restoration. J Kor Acad Cons Dent 2011;36:37-49.
Cho KJ, Park SJ, Cho HG, Kim DJ, Hwang YC, Oh WM, Hwang IN. Influence of the surface roughness on translucency and surface color of the dental composite resins. J Kor Acad Cons Dent 2006;31:312-322.
Ikeda T, Nakanishi A, Yamamoto T, Sano H. Color differences and color changes in Vita Shade tooth-colored restorative materials. Am J Dent 2003;16:381-384.
Ikeda T, Sidhu SK, Omata Y, Fujita M, Sano H. Colour and translucency of opaque-shades and bodyshades of resin composites. Eur J Oral Sci 2005;113:170-173.
Alvim HH, Alecio AC, Vasconcellos WA, Furlan M, de Oliveira JE, Saad JR. Analysis of camphorquinone in composite resins as a function of shade. Dent Mater 2007;23:1245-1249.
Rueggeberg FA, Ergle JW, Lockwood PE. Effect of photoinitiator level on properties of a light-cured and postcure heated model resin system. Dent Mater 1997;13:360-364.
Yoshida K, Greener EH. Effects of two amine reducing agents on the degree of conversion and physical properties of an unfilled light-cured resin. Dent Mater 1993;9:246-251.
Kawaguchi M, Fukushima T, Miyazaki K. The relationship between cure depth and transmission coefficient of visible-light-activated resin composites. J Dent Res 1994;73:516-521.
Moin Jan C, Nomura Y, Urabe H, Okazaki M, Shintani H. The relationship between leachability of polymerization initiator and degree of conversion of visible light-cured resin. J Biomed Mater Res 2001;58:42-46.
Teshima W, Nomura Y, Tanaka N, Urabe H, Okazaki M, Nahara Y. ESR study of camphorquinone/amine photoinitiator systems using blue light-emitting diodes. Biomaterials 2003;24:2097-2103.
Neumann MG, Miranda WG Jr, Schmitt CC, Rueggeberg FA, Correa IC. Molar extinction coefficients and the photon absorption efficiency of dental photoinitiators and light curing units. J Dent 2005;33:525-532.
Arimoto A, Nakajima M, Hosaka K, Nishimura K, Ikeda M, Foxton RM, Tagami J. Translucency, opalescence and light transmission characteristics of lightcured resin composites. Dent Mater 2010;26:1090-1097.
Emami N, Sjodahl M, Soderholm KJ. How filler properties, filler fraction, sample thickness and light source affect light attenuation in particulate filled resin composites. Dent Mater 2005;21:721-730.
Howard B, Wilson ND, Newman SM, Pfeifer CS, Stansbury JW. Relationships between conversion, temperature and optical properties during composite photopolymerization. Acta Biomater 2010;6:2053-2059.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.