Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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Effect of Vital Tooth Bleaching Agent on Dentin Bonding

생활치 미백제가 상아질 접착에 미치는 영향

  • Jeong, Na-Young (Department of Conservative Dentistry, School of Dentistry, Kyungpook National University) ;
  • Jin, Myoung-Uk (Department of Conservative Dentistry, School of Dentistry, Kyungpook National University) ;
  • Kim, Young-Kyung (Department of Conservative Dentistry, School of Dentistry, Kyungpook National University) ;
  • Kim, Sung-Kyo (Department of Conservative Dentistry, School of Dentistry, Kyungpook National University)
  • 정나영 (경북대학교 치의학대학원 치과보존학교실) ;
  • 진명욱 (경북대학교 치의학대학원 치과보존학교실) ;
  • 김영경 (경북대학교 치의학대학원 치과보존학교실) ;
  • 김성교 (경북대학교 치의학대학원 치과보존학교실)
  • Published : 2006.03.01
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Abstract

To evaluate the effect of vital tooth bleaching agent and alcohol pretreatment on dentin bonding, flat dentin windows were produced on the buccal side of the crowns of fifty-five extracted, human premolars. A bleaching gel, $Opalescence^{(R)}$ with 10% of carbamide peroxide (Ultradent Product, USA) was daily applied on the teeth of three experimental groups for six hours for 10 consecutive days, while teeth of a control group were not bleached. After 6 hours of bleaching gel application the specimens were washed and stored in saline until the next day application. After application of $One-step^{(R)}$ dentin bonding agent (Bisco, USA), $Z-250^{(R)}$ resin (3M-ESPE, USA) was bonded to dentin with a mount jig. Shear bond strength was measured with an Instron machine (Type 4202, Instron Corp., USA) after 24 hours. The results were analyzed using one-way ANOVA and Duncan's multiple range test at p < 0.05. Immediate bonding group showed significantly lower bond strength than un-bleached control group (p < 0.05). Ethanol-treated group showed significantly higher bond strength compared to immediate bonding group (p < 0.05). However, the bond strength of the ethanol treatment group was lower than that of the un-bleached control group (p < 0.05). There were no significant difference in shear bond strength between the 2-week delayed bonding group and the ethanol-treated group (p > 0.05) and between delayed bonding group and un-bleached control group (p > 0.05). In the condition of the present study. it seems that alcohol pretreatment after bleaching procedure can reduce the adverse effect of vital bleaching agent on dentin bonding.

생활치 미백제와 알콜 전처리 과정이 상아질 접착에 미치는 영향을 평가하고자 발거치 55개의 치관부 협측 상아질면에서 $Opalescence^{(R)}$(Ultradent사 미국)로 미백처리 후 즉시 $One-step^{(R)}$ 상아질 접착제(Bisco사, 미국)를 전 처치한 $Z-250^{(R)}$ 복합레진(3M-ESPE사, 미국) 접착군, 미백처리 2주후 레진 접착군, 미백처리 후 70% 에탄올 처리군, 그리고 미백처리하지 않은 대조군으로 나누어 실험한 다음 전단접착강도를 측정하고 95% 유의수준에서 일원변량분석법으로 통계분석 하였다. 생활치 미백제가 상아질 접착력을 현저히 감소시켰다. 미백처리 2주 후 레진 접착군은 미백처리하지 않은 대조군과 유의한 차이가 나타나지 않았으며 70% 에탄을 처리군은 미백처리하지 않은 대조군보다는 접착력이 낮았으나, 미백처리 2주 후 레진 접착군과는 차이가 없고 즉시 접착군보다는 높은 접착강도를 나타내었다. 따라서 임상에서 치아미백 후 즉시 레진수복을 할 경우, 에탄올로 전처리하면 상아질에서 레진 접착력을 회복할 수 있을 것으로 사료된다.

Keywords

References

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