Determining Chin Dimensions for Feminizing Genioplasty: An Anatomic Study

Area of Science:

• Anthropology
• Plastic Surgery
• Facial Anatomy

Background:

• Feminizing genioplasty aims to create feminine facial characteristics through chin modification.
• Understanding sex-based differences in facial skeletal morphology is crucial for successful feminizing genioplasty.

Purpose of the Study:

• To compare female and male facial skeletal dimensions and shape.
• To provide anatomical guidance for feminizing genioplasty procedures.

Main Methods:

• Analysis of 43 male and 43 female skulls from the Cleveland Museum of Natural History.
• Measurement and normalization of facial and chin heights and widths.
• Comparison of dimensions between sexes and across African American and Caucasian racial groups.

Main Results:

• Males generally had larger absolute chin heights and widths than females.
• Normalized chin height showed a trend toward being greater in African American males.
• Caucasian females exhibited wider angles at maximum chin projection and wider symphyseal inclinations compared to males.

Conclusions:

• Chin width reduction is typically unnecessary in feminizing genioplasty.
• Chin height reduction may be considered for some patients.
• Chin contouring is the most critical element for achieving feminization.