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Three-dimensional soft tissue evaluation after rapid maxillary expansion and mandibular midline distraction
The Angle Orthodontist
|May 3, 2021
Summary
Rapid maxillary expansion (RME) and mandibular midline distraction osteogenesis (MMDO) effectively alter facial soft tissues. These non-extraction methods improve transverse maxillomandibular deficiency, enhancing the facial profile.
Area of Science:
- Orthodontics and Dentofacial Orthopedics
- 3D Imaging in Craniomaxillofacial Surgery
- Facial Soft Tissue Analysis
Background:
- Transverse maxillomandibular deficiency often requires complex treatment.
- Non-extraction alternatives are sought to improve facial aesthetics and function.
- Understanding soft tissue changes is crucial for treatment planning.
Purpose of the Study:
- To evaluate the three-dimensional (3D) soft tissue effects of rapid maxillary expansion (RME) and mandibular midline distraction osteogenesis (MMDO).
- To assess changes in facial morphology following combined RME and MMDO treatment.
Main Methods:
- Twenty patients (mean age 15.86 years) underwent RME and MMDO with tooth-borne distractors.
- 3D stereophotogrammetry captured facial morphology at baseline, post-distraction, and post-consolidation.
- Paired t-tests analyzed soft tissue parameter changes.
Main Results:
- MMDO increased total and lower face height; RME increased nasal and mouth width.
- Lip angles and the labiomental angle showed significant changes.
- Facial convexity and mandibular angles were altered by MMDO.
Conclusions:
- RME and MMDO offer an efficient non-extraction treatment for transverse maxillomandibular deficiency.
- MMDO positively impacts the soft tissue facial profile in both transverse and vertical dimensions.
