Restorative Dentistry and Endodontics
- Volume 19 Issue 2
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- Pages.585-601
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- 1994
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- 2234-7658(pISSN)
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- 2234-7666(eISSN)
A STUDY ON THE EFFECT OF BASE MATERIALS TO PROTECT THE CERVICAL LEAKAGE OF BLEACHING AGENTS
표백제의 치경부 누출을 방지하기 위한 각종 이장재의 효과에 관한 연구
- Song, Byeong-Choon (Department of Conservative Dentistry, College of Dentistry, Chosun University) ;
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Cho, Young-Gon
(Department of Conservative Dentistry, College of Dentistry, Chosun University)
- Published : 1994.09.10
Abstract
The purpose of this study was to evaluate the ability of several intracoronal base materials to prevent cervical leakage of a bleaching agent into the dentinal tubules and along the root canal. In this study, thirty-two anterior teeth were used. After lingual access was prepared in each tooth, tooth was instrumented with a step-back technique to a Nos. 40-50 using K-type files. All teeth were obturated with a lateral condensation technique. Excess gutta percha was removed with a warm instrument to the facial level of the CEJ. Teeth were divided into four groups : Teeth in control group were not filled with base material. Teeth in groups 1, 2, and 3 had 2mm of gutta percha removed with a warm instrument, then Dycal, Fuki II LC and Z-100 were filled with palstic instruments on the top of the gutta percha respectively. All teeth were bleached for 7 days, fresh bleach was added for another 7 days, then a 10 % methylene blue dye was placed inside the access preparation. They were stored at
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