상아질표면처리데에 의한 상아질표면의 형태변화에 관한 연구
A STUDY ON MORPHOLOGlC CHANGES OF DENTlNAL SURFACES BY DENTlN CONDlTlONlNG AGENTS
소속 상세정보
이응훈
최호영/민병순/박상진/최기운
KMID : 0362319930180010173
Abstract
The purpose of this study is to observe the morphological changes of prepared dentin surfaces by 5 dentin conditioning agents.
Freshly extracted 48 healthy human molars were used in this study. The teeth were stored at 4℃ physiologic saline solution befor experiment.
The teeth were cross-sectioned to expose dentin below 3.0mm at the cusp tip and above 2.0mm at the cemento-enamel junction with Crystal Cutter(MC411D, Maruto Co., Japan).
The specimens were then divided into 12 groups.
The sectioned dentin surfaces in group 1, 3, 5, 7, 9, and 11 were prepared with No. 301 diamond point under air-water spray and those in group 2, 4, 6, 8, 10, and 12 were prepared with No. 700 carbied bur.
The prepared dentin surfaces were conditioned with Nitric acid, Citric acid, Polyacrylic acid, EDTA, and Phosphoric acid.
All the specimens were gold-coated with Eiko ion coater (Eiko-engineering Co.) and observed in Hitachi S-2300 Scanning electron microscope at 20 KV.
@ES The following results from this study were obtained:
@EN 1. The dentinal smear layers prepared with diamond point were compacted than those prepared with the carbide bur.
2. The dentinal smear layers prepared with diamond pint or carbide bur were thick but after treatment of dentin conditioning agents smear layers were removed almost.
3. Irrespective of the uses of the diamond point or the carbide bur the morphological changes of dentin surfaces treated with the same conditioning agents were similar.
4. Treatment of nitric acid and EDTA was a little effect in removing dentinal smear layer.
5. Treatment of citric acid and phosphoric acid removed the smear layer very effectively and showed dissolution of peritubular dentin and opening of dentinal tubules.
키워드
원문 및 링크아웃 정보
등재저널 정보