A Rare Occurrence of Bilateral Single-Rooted Mandibular First Molar

Area of Science:

• Dentistry
• Endodontics
• Dental Anatomy

Background:

• Knowledge of root and root canal anatomy is crucial for preventing iatrogenic errors in endodontic procedures.
• While variations in mandibular first molar anatomy are documented, cases with fewer roots, particularly bilateral root fusion, are exceptionally rare.

Observation:

• This case report focuses on the rare bilateral occurrence of mandibular first molars exhibiting root fusion, resulting in a single root.
• Cone-beam computed tomography (CBCT) was utilized to confirm the unique root anatomy before endodontic intervention.

Findings:

• Nonsurgical endodontic management was performed on both the left and right mandibular first molars presenting with single fused roots.
• Treatment involved placing an apical Mineral Trioxide Aggregate (MTA) plug, followed by backfilling with thermoplasticized gutta-percha.

Implications:

• This case highlights the importance of advanced imaging like CBCT in diagnosing and managing rare root canal anatomies.
• Successful nonsurgical endodontic treatment in such cases demonstrates the adaptability of established techniques to complex dental morphology.