Incidence and position of the canal isthmus in maxillary second premolars
- VernacularTitle:上颌第二前磨牙根管峡发生率和位置的研究
- Author:
Chen WEI
;
Yang JIAN
- Publication Type:Journal Article
- Keywords:
Premolar;
Canal isthmus;
Incidence
- From:
Journal of Practical Stomatology
2000;0(06):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To investigate the root canal configuration and the incidence and location of the isthmus in extracted maxillary second premolar with single root. Methods: 60 maxillary second premolars were included in the study. 1 mm root was cut from the apical end of root. The transverse section was stained with methylene blue dye and viewed with a surgical operating microscope. 1 mm increment sections were made and stained and observed by the same way from apex to 6 mm. The number of canals as well as the type of canal isthmuses were recorded. Results: 41.67% maxillary second premolar with single root had two canals. Canal isthmus happened more frequently in the apical 4 mm levels. Conclusion: The incidence of isthmus in the maxillary second premolar was highest in the apical 3-to 5-mm level. Canal morphology in the apical 1-to 6-mm is complicated.
