The effect of calcium hydroxide removal and the seal ability of root canal using different irrigation methods
- VernacularTitle:根管内Ca(OH)_2去除效果对根尖封闭性能影响的研究
- Author:
Ying LI
;
Weidong NIU
;
Chun SHI
- Publication Type:Journal Article
- Keywords:
Calcium hydroxide;
Root canal irrigation;
Scanning electron microscopic;
Dye penetration
- From:
Journal of Practical Stomatology
2000;0(05):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To evaluate the ability of calcium hydroxide removal using different irrigation methods and the effect on canal sealing.Methods:200 human single root canal premolar teeth were prepared.Divided the teeth randomly into 2 groups(each group 96 teeth,8 as control),one group filled with chemical calcium hydroxide and another filled with finished product calcium hydroxide.7 days after,divided each groups randomly into 6 subsets and remove the calcium hydroxide in the root canal(table1).Then each subset group choose 8 teeth randomly,observed by scanning electron microscope.Other specimens were obturated by lateral condensation of cold gutta-percha with a AH-Plus sealer,stained by Indian ink and then made into transparent teeth model.Results:At the same condition,there was no significant difference between group A and group B;the results of groups associated with ultrasonic were better than groups with injection syringe.The rinse solution EDTA was the best,distilled water was the worse.Dye penetration showed that the length of dye staining was no significant difference among all groups.Conclusion:Ultrasonic and sodium hypochlorite associate EDTA is the best method to remove the calcium hydroxide.But none of the methods and rinse solution used in this experiment can remove all of the calcium hydroxide.The calcium hydroxide remained influence on the root canal sealer is not predominance.
