Publication: Diversity of Root Canal Morphology in Mandibular First Premolar
Date
2019
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Kathmandu University
Abstract
ABSTRACT
Background
Mandibular first premolars have been reported to have complex anatomical
aberration making them one of the most difficult teeth to manage endodontically.
Objective
To determine the root canal anatomy of mandibular first premolar in a Nepalese
population using decalcification and clearing technique.
Method
One hundred and fifty extracted mandibular first premolars were collected from
Nepalese population. Access cavities were prepared on the occlusal surface of each
tooth. Teeth were decalcified by immerging in 5% nitric acid, dehydrated in ethyl
alcohol and made transparent using methyl salicylate. Methylene blue dye was
injected through access cavity and canal anatomy were observed and classified
according to Vertucci’s classification.
Result
The average length of mandibular first premolar was 20.43mm. One rooted teeth
were 96% and two rooted were 4%. Vertucci’s type I canal configuration was most
prevalent (72%) followed by type V (18.6%), type III (3.3%), type II (2.6%) and type IV
(2.6%). An unusual configuration was found in one tooth. Isthmus and apical deltas
were found in 8.6%) and 14.6% of the cases respectively.
Conclusion
Type I canal configuration were the most frequently observed root canal configuration
in mandibular first premolar followed by type V configuration. Such variation in root
canal anatomy should be taken into consideration to ensure successful endodontic
therapy of these teeth.
KEY WORDS
Decalcification and clearing, Mandibular first premolar, Nepalese, Root canal
morphology
Description
Shrestha R,1 Srii R,2 Shrestha D3
1Department of Conservative Dentistry and Endodontics
National Academy of Medical Sciences Kathmandu, Nepal.
2Department of Oral and Maxillofaciol Pathology
Kathmandu University School of Medical Sciences
Dhulikhel, Nepal.
3Department of Conservative Dentistry and Dndodontics
Kathmandu Medical College
Kathmandu, Nepal.
Keywords
Decalcification and clearing, Mandibular first premolar, Nepalese, Root canal morphology