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Updated: May 20, 2026
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Quantitative Assessment Protocol for Facial Soft Tissue Volumetric Changes with Stereophotogrammetry
Published on: December 9, 2025
Midfacial soft-tissue changes after mandibular setback surgery with or without paranasal augmentation: cone-beam
Soo-Byung Park1, Yong-Il Kim, Dae-Seok Hwang
1Department of Orthodontics, Pusan National University Hospital, Busan, South Korea.
Summary
This study compared midfacial soft-tissue changes after mandibular setback surgery. Adding paranasal augmentation significantly altered midfacial soft tissues, unlike surgery alone.
Area of Science:
- Plastic Surgery
- Orthognathic Surgery
- Craniofacial Anatomy
Background:
- Class III deformities often involve mandibular hypoplasia.
- Surgical correction frequently involves mandibular setback procedures.
- Midfacial aesthetics can be impacted by these procedures.
Purpose of the Study:
- To compare midfacial soft-tissue changes after mandibular setback sagittal split ramus osteotomy (SSRO) alone versus SSRO with paranasal augmentation.
- To evaluate the impact of paranasal augmentation on facial aesthetics in conjunction with SSRO.
- To provide data for clinicians managing Class III deformities.
Main Methods:
- Retrospective comparison of two patient groups: SSRO with paranasal augmentation (n=15) and SSRO alone (n=20).
- Utilized cone-beam computed tomography (CBCT) superimposition for analysis.
- Measured midfacial soft-tissue changes using a 10x27 grid, comparing pre- and postoperative data.
Main Results:
- Significant soft-tissue changes were observed in the midface of the SSRO with paranasal augmentation group.
- These changes were noted in areas including the infraorbital region, zygomatic eminence, lateral nose, and nasolabial fold.
- No significant midfacial soft-tissue changes were recorded in the SSRO alone group.
Conclusions:
- Paranasal augmentation combined with SSRO leads to notable midfacial soft-tissue alterations.
- Mandibular setback SSRO alone does not significantly change midfacial soft tissues.
- Findings aid in predicting midfacial outcomes for Class III deformity correction.
