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Gutta percha 충전시 도말층 유무에 따른 근관벽과의 접합도에 관한 주사전자현미경적 연구
문주훈,조영곤 朝鮮大學校 口腔生物學硏究所 1991 口腔生物學硏究 Vol.15 No.-
The purpose of this study was to evaluate the adaptation of filling material to the dentimal walls of root canals with and without smear layer. Fifty extracted upper and lower anterior teeth were selected, and the root canals were instrumented with K-files 1㎜ short of the apical foramen by step-back method. The teeth were randomly divided into two groups of 25 each : in the group Ⅰ, smear layers were not removed, and in the group Ⅱ, smear layers were removed by 15% EDTA solution. Again the two groups of 25 teeth were randomly divided into unfilled contol group and filling groups (lateral, ultrasonic, ULTRAFIL, McSpadden compaction group). Upon completion of root canal filling, the teeth were grooved on the both the labial and lingual surfaces and then split with mallet and chisel. Each specimens were examined with JSM-840 Scanning Electron Microscope (JEOL., Japan). The results were as follows : 1. In the contol group, dentinal tubules of group Ⅰ couldn't be distinguished in the canal wall, but those of group Ⅱ appeared to be open and patent. 2. In the filling groups of group Ⅰ, the tubular penetration of the sealer or gutta percha couldn's be seen, but in the filling groups of group Ⅱ, it could be seen except McSpadden compaction group. 3. In the filling groups, ULTRAFIL group showed the best adaptation of filling material to root canal wall among the group Ⅰ, and lateral and ultrasonic condensation group compaction group showed the worst adaptation in group Ⅰ, Ⅱ. 4. Generally, the group Ⅱ showed better adaptation of filling material to root canal wall than the group Ⅰ.
구치부 복합레진 수복을 위한 와동 이장용 재료의 방사선투과성에 관한 연구
문주훈,최의환,Moon Joo-Hoon,Choi Eui-Rwan 대한영상치의학회 2000 Imaging Science in Dentistry Vol.30 No.4
Purpose: The aim of this study was to determine the relative radiopacities of cavity lining materials (Resin-modified Glass Ionomer cement, Compomer and Plowable resin) for posterior composite resin restoration. Material & Methods: Resin-modified glass ionomer cement (Fuji II LC, Vitrebond/sup TM/), Compomers (Dyract /sup (R)/ Compoglass, F2,000, Dyract/sup (R)/ flow Compoglass Flow) and Flowable resins (Tetric/sup (R)/ flow, Aeliteflo/sup TM/ Revolution/sup TM/) were used. Five specimens of 5 mm in diameter and 2 mm thick were fabricated with each material. Human molars were horizontally sectioned 2 mm thick to include both enamel and dentin. The radiopacities of enamel, dentin, cavity lining materials, aluminum step wedge were obtainded from conventional radiograph and NIH image program. Results: All the tested lining materials showed levels of radiopacity the same as or greater than that of dentin. All compomer tested (Dyract, Compoglass, F2,000, Dyract flow, Compoglass Flow) and Vitrebond/sup TM/, Tetric/sup (R)/ flow were more radiopaque than enamel. The radiopacities of Fuji II LC and Revolution/sup TM/ were between enamel and dentin and resin-modified glass ionomer cement, Compomer and Tetric/sup (R)/ flow were greater than those of Revolution/sup TM/, Aeliteflo/sup TM/ or dentin. The level of radiopacity of the tested materials was variable; those with low radiopacity should be avoided in class II restorations, where a clear determination of recurrent caries by the examining clinician could be compromised. Conclusion: Clinician should be able to distinguish these cavity lining materials radiographically from recurrent decay, voids, gaps, or other defects that lead to clinical failure. Utilization of materials ranked more radiopaque than enamel would enable clinicians to distinguish the lining material from tooth structure.
구치부 복합레진 수복을 위한 와동 이장용 재료의 방사선불투과성에 관한 연구
문주훈,최의환 大韓口腔顎顔面 放射線學會 2000 Imaging Science in Dentistry Vol.30 No.4
Purpose : The aim of this study was to determine the relative radiopacities of cavity lining materials (Resin-modified Glass Ionomer cement, Composer and plowable resin) for posterior composite resin restoration. Material & Methods : Resin-modified glass ionomer cement (Fuji II LC, VitrebondTM), Compomers (Dyract□, Compoglass, F2,000, Dyract□ flow Compoglass Flow) find Flowable resins (Tetric□ flow, AelitefloTM RevolutionTM) were used. Five specimens of 5 mm in diameter and 2 mm thick were fabricated with each material. Human molars were horizontally sectioned 2 mm thick to include both enamel and dentin. The radiopacities of enamel, dentin, cavity lining materials, aluminum step wedge were obtainded from conventional radiograph and NIH image program. Results : All the tested lining materials showed levels of radiopacity the same as or greater than that of dentin. All compomer tested (Dyract□, Compoglass, F2,000, Dyract□ flow, Compoglass Flow) and VitrebondTM, Tetric□ flow were more radiopaque than enamel. The radiopacities of Fuji II LC and RevolutionTM were between enamel and dentin and resin-modified glass ionomer cement, Compomer and Tetric□ flow were greater than those of RevolutionTM, AelitefloTM or dentin. The level of radiopacity of the tested materials was variable; those with low radiopacity should be avoided in class II restorations, where a clear determination of recurrent caries by the examining clinician could be compromised. Conclusion : Clinician should be able to distinguish these cavity lining materials radiographically from recurrent decay, voids, gaps, or other defects that lead to clinical failure. Utilization of materials ranked more radiopaque than enamel would enable clinicians to distinguish the lining material from tooth structure. (Korean J Oral Maxillofac Radiol 2000; 30:243-248)