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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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이 논문의 연구 히스토리 (5)
2010
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Objectives : The purpose of this study was to evaluate the effects of tooth bleaching agent contained 35%hydrogen peroxide on the color, microhardness and surface roughness of tooth-colored restorative materials.
Methods : Four types of tooth-colored restorative materials, including a composite resin(Filtek Z350 ;Z350), a flowable composite resin(Filtek P60 : P60), a compomer(DyractⓇ AP ; DY), and a glass-ionomer cement(KetacTM Molar Easymix ; KM) were used in the study. The specimens(8mm×5mm) were made by using a customized acrylic mold. Each material was divided into two groups equally(n=40) : experimental group(35% HP) and control group(distilled water). 35% HP group was treated 30 mim/5 days for 15 days.
Each 30 minute treatment session consisted of two 15 minute cycles of gel application with 20 second light exposure. The authors measured the color, microhardness, and roughness of the specimens before and after bleaching. The data were analyzed with ANOVA and T-test.
Results : 35% HP group showed an apparent color change(△E*) than control group. In particular, DY and KM showed a noticeable color change and statistically significant differences(p＜0.05). 35% HP group showed a reduction in microhardness. Z350 and P60 does not have a statistically significant difference(p＞0.05), DY and KM showed a statistically significant difference(p＜0.05). Percentage microhardness loss(PML) of control group was 0.6 to 5.5% in the group, 35% HP group was 6.6 to 34.6%. Roughness was increased in 35% HP group after bleaching. Especially DY and KM were significantly increased(p＜0.05).
Conclusions : Bleaching agents may affect the surface of existing restorations; therefore, they should not be used indiscriminately when tooth-colored restorations are present.
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참고문헌 (26)
참고문헌 신청
Akal N / 2001 / Effect of carbamide peroxide containing bleaching agents on the morphology and subsurface hardness of enamel / Journal of Clinical Pediatric Dentistry 25 (4)
Fasanaro TS / 1992 / Bleaching teeth: history, chemicals, and methods used for common tooth discolorations / J Esthet Dent 4 (3) : 71 ~ 78
Goldberg M / 2005 / Tooth bleaching treatment / Association Dentaire Francaise : 10 ~ 46
Gurgan S / 2007 / Effect of carbamide peroxide treatments on the metal-ion release and microstructure of different dental amalgams / Oper Dent 32 (5) : 476 ~ 481
Hannig C / 2007 / Effect of bleaching on subsurface micro-hardness of composite and a polyacid modified composite / Dent Mater 23 (2) : 198 ~ 203
Fasanaro TS / 1992 / Bleaching teeth: history, chemicals, and methods used for common tooth discolorations / J Esthet Dent 4 (3) : 71 ~ 78
Goldberg M / 2005 / Tooth bleaching treatment / Association Dentaire Francaise : 10 ~ 46
Gurgan S / 2007 / Effect of carbamide peroxide treatments on the metal-ion release and microstructure of different dental amalgams / Oper Dent 32 (5) : 476 ~ 481
Hannig C / 2007 / Effect of bleaching on subsurface micro-hardness of composite and a polyacid modified composite / Dent Mater 23 (2) : 198 ~ 203
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