Effect of two different calcium hydroxide paste removal techniques on apical leakage : an electrochemical study = 수산화칼슘 제제의 제거 방법이 치근단 누출에 미치는 영향에 대한 전기화학적 연구

국문 초록 (Abstract)

본 연구의 목적은 근관내 약제로 사용되는 수산화칼슘의 제거방법이 근관충전 후 치근단 미세누출에 미치는 영향을 알아보기 위함이다.
70개의 발거된 단근치를 엔진구동형 ProFile로 근관형성한 후 수용성 수산화칼슘 제제를 1주일간 적용하고 두 군으로 나누어 각기 다른 방법으로 제거하였다. A군은 NaOCI로 근관세정만을 시행하였으며, B군은 근관형성 시 사용된 file보다 한 단계 큰 크기의 ProFile을 사용하여 근관을 재형성한 후 NaOCI로 세척하였다. 근관충전 후 전기화학적 방법으로 24일 동안 치근단 누출을 측정, 비교하였다.
본 연구의 결과 수산화 칼슘 제거를 위한 두가지 방법은 근관충전후 치근단 미세누출에 있어서 차이가 없음을 알 수 있었다.

다국어 초록 (Multilingual Abstract)

This study evaluated the effect of two different calcium hydroxide (Ca(OH)_(2)) paste removal techniques on the apical leakage of canals obturated with gutta percha cones and sealer after removing a Ca(OH)_(2) dressing using an electrochemical method.
Seventy extracted single-rooted teeth were instrumented on with Profile rotary files under NaOCI irrigation. Fifty-eight canals were filled with calcium hydroxide paste, which was then removed using one of the following two techniques. In group A, calcium hydroxide was removed using only NaOCI irrigation, and in group B, the canals were re-prepared with a Profile rotary files-one size larger than the previous instrument and were irrigated with NaOCI. In both groups, the root surfaces were coated twice with nail varnish from CEJ to an area 4㎜ away from the apex after canal obturation. Apical leakage was measured using an electrochemical method for 24 days.
All the specimens showed leakddffqage that increased markedly in the first three days. There was no significant difference between the two groups (p > 0.05). The effect of two calcium hydroxide paste removal techniques on the apical leakage was not different during a short period.

참고문헌 (Reference)

1 "The investigation of microleakage in root canal therapy" 817-823, 421976

2 "The antibacterial action of sodium hypochlorite and EDTA in 60 cases of endodontic therapy" 35-40, 181985

3 "Removal efficiency of calcium hydroxide dressing from the root canal" 25 : 85-88, 1999

4 "Mechanisms of antimicrobial activity of calcium hydroxide a critical review" 32 : 361-369, 1999

5 "Lack of correlation among three methods for evaluation of apical leakage" 27 : 347-350, 2001

6 "Incomplete calcium hydroxide removal from the root canal a case report" 30 : 418-421, 1997

7 "In vitro solubility of human pulp tissue in calcium hydroxide and sodium hypochlorite" 104-108, 81992

8 "Effects of pressure and measurement time on the fluid filtration method in endodontics" 27 : 256-258, 2001

9 "Effects of calcium hydroxide paste as an intracanal medicament on apical seal" 16 : 369-374, 1990

10 "Effects of calcium hydroxide and sodium hypochlorite in the dissolution of necrotic porcine muscle tissue" 14 : 125-127, 1988

11 "Effect of calcium hydroxide dressing on seal or permanent root filling" 13 : 281-284, 1997

12 "Decoloration of 1% methylene blue solution in contact with dental filling materials" 26 : 585-589, 1998

13 "Comparison and reliability of techniques for measuring leakage and marginal penetration" 410-416, 531982

14 "Calcium hydroxide pastes classification and clinical indications" 32 (32): 257-282, 1999

15 "Calcium hydroxide in the treatment of pulpless teeth with associated pathology" 8 : 74-93, 1975

16 "Apical leakage following root canal dressing with calcium hydroxide" 11 : 261-23, 1995

17 "A technique for placement o calcium hydroxide in the root canal system" 103 : 417-421, 1981

18 "A review of calcium Hydroxide" 283-297, 231990