Abstract
Commonly, the mandibular premolars' root canal system is complex and usually requires special management skills in root canal treatment. The occurrence of three root canals in the mandibular first premolar is relatively uncommon. Furthermore, the four root canals in the second premolar are extremely rare and clinically quite challenging to manage. Proper knowledge of the root canal anatomy and delicate radiographic interpretation and clinical inspection is essential for successful root canal treatment of the mandibular premolars.
Highlights
IntroductionThe mandibular first premolar is a single-rooted tooth (97.21%), their canal configurations may vary from a single canal in (73.55%) to two canals in (23.55%)
Proper knowledge of the root canal anatomy and delicate radiographic interpretation and clinical inspection is essential for successful root canal treatment of the mandibular premolars
The mandibular first premolar is a single-rooted tooth (97.21%), their canal configurations may vary from a single canal in (73.55%) to two canals in (23.55%)
Summary
The mandibular first premolar is a single-rooted tooth (97.21%), their canal configurations may vary from a single canal in (73.55%) to two canals in (23.55%). C-shaped canals anatomy has been reported in the mandibular premolars [3]. Developmental grooves are usually present on both the mesial and distal surfaces of the mandibular first premolar root, resulting in an oval shaped root. Ethnic variation of the root canal anatomy was reported in the mandibular second premolar. The access cavity was thoroughly irrigated with 5% NaOCl. Clinical examination using a DG-16 endodontic explorer (HuFriedy, Chicago, IL) with the aids of the magnifying loups (3.5 × 420 mm) and LED headlight revealed three root canals: Mesiobuccal, distobuccal, and lingual. Root canals patency was maintained throughout the cleaning and shaping steps using size 10 K-file (Dentsply Maillefer, Ballaigues, Switzerland). Root canal sealer puff was noticed apically and laterally in conjunction with the impacted premolar
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