Hamular Notch

Anatomical Landmarks

• The hamular notch lies posterior to the maxillary tuberosity.
• It extends medially and slightly downward toward the pterygoid hamulus, a hook-like projection of the medial pterygoid plate of the sphenoid bone.
• It’s palpable intraorally in edentulous patients and is often used as a reference point for complete denture fabrication.

How to find Hamular Notch?

• Use a mouth mirror and palpate to locate the hamular notch in edentulous patients.
• Record the area using impression compound or elastomeric materials during the border molding stage of denture construction.
• Avoid overextension into the notch area to prevent ulceration or irritation of the pterygoid hamulus.

Significance

1. Denture Fabrication:

• The hamular notch serves as a posterior landmark for determining the posterior palatal seal (PPS) in maxillary complete dentures.
• Accurate recording of the hamular notch ensures a proper seal, retention, and stability of the upper denture.
• If not captured properly, it can lead to poor suction and denture dislodgement during function.

2. Clinical Significance:

• It helps in the termination of the vibrating line, which is vital for the design of the PPS area.
• The vibrating line usually runs from one hamular notch to the other, and it’s where the soft palate begins its movement during phonation.

3. Surgical Landmark:

• In oral surgeries, particularly maxillary surgeries, the hamular notch may serve as an orientation point.
• In cases involving palatal implants, maxillary sinus surgeries, or tuberosity reduction, the hamular notch location aids in safe and precise navigation.