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A novel technique for malar eminence evaluation using 3-dimensional computed tomography.

Sami P Moubayed¹, Frederick Duong, Christian Ahmarani

¹Otolaryngology–Head and Neck Surgery Service, Department of Surgery, Maisonneuve-Rosemont Hospital, Montreal, Quebec, Canada.

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|August 23, 2012

Summary

This study introduces a new 3D-CT method to precisely locate the malar eminence and assess facial symmetry. The findings reveal a 40.5% prevalence of malar eminence asymmetry in adults.

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Area of Science:

Medical Imaging
Anatomy
Facial Surgery

Background:

Facial symmetry is crucial for aesthetic outcomes in reconstructive and cosmetic surgery.
Accurate assessment of the malar eminence is essential for planning procedures.
Existing methods for malar eminence evaluation may lack precision.

Purpose of the Study:

To present a novel method for locating the malar eminence using 3D-CT.
To introduce a new patient-oriented axis system for evaluating malar eminence symmetry.
To determine the prevalence of malar eminence asymmetry in a healthy adult population.

Main Methods:

A retrospective case series of 42 disease-free white adults was conducted.
3D-CT reconstructions were used to identify the soft-tissue maxillozygion for malar eminence localization.
A patient-oriented axis system was created using midline landmarks (nasion, subspinale, basion) to assess symmetry.

Main Results:

The 3D-CT technique effectively and easily localized the malar eminence via the soft-tissue maxillozygion.
Clinical asymmetry of the soft-tissue maxillozygion was observed in 40.5% of patients.
Other evaluated skeletal and soft-tissue landmarks exhibited asymmetry ranging from 24.0% to 50.0%.

Conclusions:

The 3D-CT soft-tissue maxillozygion is a reliable landmark for precise malar eminence localization.
A robust patient-oriented axis system can be established using nasion, subspinale, and basion.
The study identified a significant prevalence of malar eminence asymmetry (40.5%) in the studied cohort.