First Report of Tripled Retromolar Foramina

Area of Science:

• Anatomy
• Oral and Maxillofacial Surgery
• Radiology

Background:

• The retromolar foramen (RMF) is a critical anatomical landmark, serving as the entry point for neurovascular bundles.
• Accurate identification of RMFs and their variations is crucial for preventing surgical complications, ensuring successful implant placement, and optimizing local anesthesia in the mandibular region.

Observation:

• A cone-beam computed tomography (CBCT) scan of a cadaver mandible revealed an exceptionally rare instance of a triple retromolar foramen (RMF) on the right side.
• No RMFs were observed on the left side of the same mandible.

Findings:

• The three identified right RMFs had measured diameters of 0.8 mm, 1.0 mm, and 1.1 mm.
• These foramina were located at distances of 4.0 mm, 3.6 mm, and 0.5 mm from the distal edge of the third molar, respectively.

Implications:

• This case underscores the potential for significant anatomical variations in the retromolar region, challenging previous reports of supernumerary RMFs.
• Awareness of such rare mandibular canal variations is vital for clinicians performing procedures in the posterior mandible to mitigate risks and enhance patient safety.