Chin Dysmorphology in the Primary Rhinoplasty Population: Prevalence, Objective Analysis, and Implications

Overview

The chin and the nose read against each other in profile, so a small chin makes a nose look larger. The authors set out to measure how often chin abnormalities occur in people seeking rhinoplasty and to describe the planning problem created when a patient or parent declines chin surgery. They reviewed 108 consecutive primary rhinoplasty patients, taking demographics, soft tissue cephalometric measurements and surgical details.

Sections of note

• Design: retrospective review of 108 consecutive primary rhinoplasty patients. Level of evidence III. Exclusions: prior jaw or chin surgery, jaw trauma, congenital craniofacial deformity.
• 92 of 108 patients, 85.2 percent, were female. Mean age 30.8 years, range 14 to 72.
• 97 patients, 89.8 percent, showed some degree of objective chin dysmorphology.
• Classes recorded: 15 Class I macrogenia at 13.9 percent, 63 Class II microgenia at 58.3 percent, 14 Class III combined at 12.9 percent, and 41 Class IV asymmetry at 38 percent. The class counts overlap, since they exceed the 97 affected patients.
• All patients were offered chin correction; 11 accepted, 10.1 percent. 5 had bone genioplasty, mean advancement 7.8 millimeters, and 7 had fat grafting, mean 4.4 cubic centimeters. These counts sum to 12, not 11, an internal inconsistency.

What it means for a patient

• A receding chin was the most common finding, present in nearly six in ten of these patients, and it changes how the nose appears in profile.
• Almost everyone offered chin correction declined, so most rhinoplasty is performed without addressing the chin.
• Measurement here was by photographs and cephalometric analysis, not by asking patients whether the chin bothered them.
• Limits: 108 patients, one practice, retrospective, and no outcome comparison between those who had chin correction and those who did not.

Why this paper matters

Profile balance depends on both the nose and the chin, and operating on one alone limits what the profile can become. Quantifying how common chin abnormalities are, and how rarely they are treated, frames a gap between what surgeons recommend and what patients accept. Whether treating the chin improves rhinoplasty satisfaction is not measured here.

Terms

• Microgenia: an underdeveloped or receding chin.
• Macrogenia: an overly prominent or large chin.
• Genioplasty: surgery to reposition or reshape the chin bone.
• Cephalometrics: standardized measurements of the head and face.
• Dysmorphology: a measurable deviation from typical form.