Restorative Dentistry & Endodontics

Chang-Won Byun

2 Articles

Optical characteristics of resin composite before and after polymerization: Ah-Hyang Eom, Duck-Su Kim, Soo-Hee Lee, Chang-Won Byun, Noh-Hoon Park, Kyoung-Kyu Choi; J Korean Acad Conserv Dent 2011;36(3):219-230. Published online May 31, 2011; DOI: https://doi.org/10.5395/JKACD.2011.36.3.219

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 Δrefractive 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.

Citations

Citations to this article as recorded by

İçeceklerin Tek Renkli Kompozit Rezinlerin Renk Stabilitesine ve Yüzey Pürüzlülüğüne Olan Etkisi
Özlem ERÇİN, Dilan KOPUZ
ADO Klinik Bilimler Dergisi.2024; 13(1): 68. CrossRef
Color Change in Tooth Induced by Various Calcium Silicate-Based Pulp-Capping Materials
Jiyoon Jeon, Namki Choi, Seonmi Kim
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY.2021; 48(3): 280. CrossRef

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The effect of reinforcing methods on fracture strength of composite inlay bridge: Chang-Won Byun, Sang-Hyuk Park, Sang-Jin Park, Kyoung-Kyu Choi; J Korean Acad Conserv Dent 2007;32(2):111-120. Published online March 31, 2007; DOI: https://doi.org/10.5395/JKACD.2007.32.2.111

Abstract PDF PubReader ePub

The purpose of this study is to evaluate the effects of surface treatment and composition of reinforcement material on fracture strength of fiber reinforced composite inlay bridges.

The materials used for this study were I-beam, U-beam TESCERA ATL system and ONE STEP(Bisco, IL, USA). Two kinds of surface treatments were used; the silane and the sandblast. The specimens were divided into 11 groups through the composition of reinforcing materials and the surface treatments.

On the dentiform, supposing the missing of Maxillary second pre-molar and indirect composite inlay bridge cavities on adjacent first pre-molar disto-occlusal cavity, first molar mesio-occlusal cavity was prepared with conventional high-speed inlay bur.The reinforcing materials were placed on the proximal box space and build up the composite inlay bridge consequently. After the curing, specimen was set on the testing die with ZPC. Flexural force was applied with universal testing machine (EZ-tester; Shimadzu, Japan). at a cross-head speed of 1 mm/min until initial crack occurred. The data wasanalyzed using one-way ANOVA/Scheffes' post-hoc test at 95% significance level.

Groups using I-beam showed the highest fracture strengths (p < 0.05) and there were no significant differences between each surface treatment (p > 0.05). Most of the specimens in groups that used reinforcing material showed delamination.

The use of I-beam represented highest fracture strengths (p < 0.05).

In groups only using silane as a surface treatment showed highest fracture strength, but there were no significant differences between other surface treatments (p > 0.05).

The reinforcing materials affect the fracture strength and pattern of composites inlay bridge.

The holes at the U-beam did not increase the fracture strength of composites inlay bridge.

Citations

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Esthetic rehabilitation of single anterior edentulous space using fiber-reinforced composite
Hyeon Kim, Min-Ju Song, Su-Jung Shin, Yoon Lee, Jeong-Won Park
Restorative Dentistry & Endodontics.2014; 39(3): 220. CrossRef

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