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Orbital dysmorphology in unilateral coronal synostosis
1Division of Plastic Surgery, Washington University Medical Center, St. Louis, Missouri, USA.
Summary
Unilateral coronal synostosis (UCS) surgery improves orbital asymmetry in children. This cranio-orbital surgery partially normalizes both bony and soft tissue orbital development during the first year post-operation.
Area of Science:
- Craniofacial Surgery
- Pediatric Ophthalmology
- Medical Imaging
Background:
- Unilateral coronal synostosis (UCS) causes significant craniofacial deformities, particularly affecting the fronto-orbital region.
- Surgical intervention in infancy aims to correct these deformities, but the precise impact on orbital structures is not fully understood.
Purpose of the Study:
- To quantitatively assess preoperative orbital dysmorphology in UCS patients.
- To evaluate the surgical outcomes on orbital dimensions and contents following cranio-orbital reconstructive surgery.
Main Methods:
- Utilized 3D CT scans from 28 UCS patients (preoperative and postoperative).
- Analyzed orbital index, orbital volume, globe volume, and ventral globe index using specialized software.
- Employed statistical analysis (Student's t-test) to compare ipsilateral and contralateral orbits.
Main Results:
- Preoperatively, ipsilateral orbits showed a significantly larger orbital index compared to contralateral orbits.
- Postoperative scans revealed significant improvement in orbital dimensions on both sides, though asymmetry persisted.
- Globe volume in ipsilateral orbits increased significantly post-surgery, indicating improved soft tissue development.
Conclusions:
- UCS impacts the development of both the bony orbit and its soft-tissue contents.
- Cranio-orbital surgery effectively reduces orbital asymmetry in UCS patients.
- Infant surgery facilitates partial normalization of orbital growth, allowing for improved development of both hard and soft tissues.