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Root canal morphology of mandibular premolars
Journal of the American Dental Association (1939)
|July 1, 1978
Summary
Most mandibular first premolars have one root canal, while most mandibular second premolars also exhibit a single canal. This study analyzed canal anatomy in these crucial teeth.
Area of Science:
- Dentistry
- Endodontics
- Dental Anatomy
Background:
- Understanding root canal morphology is crucial for successful endodontic treatment.
- Variations in root canal anatomy can complicate treatment and affect prognosis.
- Mandibular premolars present unique anatomical challenges due to their root structure.
Purpose of the Study:
- To investigate and quantify the root canal morphology of mandibular first and second premolars.
- To determine the prevalence of single, double, and triple apical canals in these teeth.
- To analyze canal ramifications, apical foramen location, and anastomoses.
Main Methods:
- Decalcification and dye injection of 400 mandibular first premolars and 400 mandibular second premolars.
- Transparency preparation for detailed visualization of internal root structures.
- Microscopic examination to identify and count root canals and their features.
Main Results:
- Mandibular first premolars: 74.0% had one apical canal, 25.5% had two, and 0.5% had three.
- Mandibular second premolars: 97.5% had one apical canal, and 2.5% had two.
- Detailed analysis of canal types, ramifications, apical foramen location, and anastomoses was performed.
Conclusions:
- Mandibular first premolars exhibit significant variability in root canal anatomy, with a substantial percentage having two apical canals.
- Mandibular second premolars predominantly display a single root canal system.
- These findings are vital for endodontic treatment planning and execution in the mandibular arch.