The AAPS 102nd Annual Meeting

Computed Tomography Analysis Of Mandibular Asymmetry Progression In Patients With Unilateral Craniofacial Microsomia

Purpose

•Different levels of mandibular hypoplasia and/or deformity observed between the two halves of the mandible in craniofacial microsomia (CFM) result in mandibular asymmetry.

•The purpose of this study is to determine whether the mandibular asymmetry in CFM is progressive or static.

•The study also aims to evaluate whether the progressive nature of mandibular asymmetry varies with the Pruzansky classification of the degree of mandibular severity.

Methods

•Medical charts of patients with unilateral CFM seen between 2009-2022 before undergoing mandibular surgery were reviewed and available CT scans were collected.

•CT scan mandibular 3D reconstruction was conducted in Materialize MIMICS software (v 24.0).

•Mandibular body length and ramus height were measured for the affected and unaffected sides at each CT scan time point.

•The measurements of the affected side were compared against the average growth curve of the unaffected side.

Conclusions

•Mandibular body length and ramus height growth pattern is similar between the affected and unaffected sides for Pruzansky type I and IIa mandibles.

•Mandibular body length growth for the affected side reaches a plateau earlier in Pruzansky type IIb mandibles.

•Mandibular ramus height growth rate for the affected side in Pruzansky type IIb mandiblesis initially slower than the unaffected side but starts increasing after 210 months.

•Mandibular asymmetry in unilateral CFM appears to be static in Pruzansky type I and IIa mandibles and progressive in type IIb mandibles.

The AAPS 102nd Annual Meeting

Computed Tomography Analysis Of Mandibular Asymmetry Progression In Patients With Unilateral Craniofacial Microsomia

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