Ear projection and the posterior auricular muscle insertion

Area of Science:

• Plastic Surgery
• Anatomy
• Congenital Anomalies

Background:

• Prominent ears affect about 5% of the population.
• Common causes include conchal valgus, anthelix underfolding, or concha hypertrophy.
• The posterior auricular muscle's insertion may influence ear protrusion.

Purpose of the Study:

• To investigate the relationship between posterior auricular muscle insertion site and ear prominence.
• To clinically validate anatomical theories of prominent ear etiology.

Main Methods:

• Intraoperative measurements of posterior auricular muscle insertion.
• Comparison between patients undergoing otoplasty and controls needing conchal grafts.
• Assessment of cranioauricular angle and ear projection.

Main Results:

• A proximally displaced muscle insertion site was observed.
• This displacement reduces the muscle's effective momentum, contributing to ear protrusion.

Conclusions:

• The posterior auricular muscle insertion site is a significant factor in prominent ear development.
• This finding offers potential for targeted surgical correction in otoplasty.