Related Experiment Video
Updated: May 30, 2026
04:11
The Establishment of a Murine Maxillary Orthodontic Model
Published on: October 27, 2023
Hyrax application as a tooth-borne distractor for maxillary advancement
Rahman Showkatbakhsh1, Fereydoun Pourdanesh, Abdolreza Jamilian
1Department of Orthodontics, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
The Journal of Craniofacial Surgery
|July 21, 2011
Summary
Internal distraction osteogenesis effectively treated maxillary hypoplasia and hypernasality in a cleft lip and palate patient. This surgical technique improved skeletal alignment and significantly enhanced speech quality.
Area of Science:
- Craniofacial Surgery
- Orthodontics
- Pediatric Dentistry
Background:
- Distraction osteogenesis (DO) is a key surgical method for jaw deformities.
- Maxillary hypoplasia often presents with significant functional and aesthetic challenges, particularly in patients with cleft lip and palate.
Observation:
- A 17-year-old male with cleft lip and palate presented with class III malocclusion and maxillary deficiency.
- The patient experienced severe hypernasality, necessitating surgical intervention.
- Internal DO was chosen as the treatment modality.
Findings:
- A modified Le Fort I osteotomy combined with a two-stage hyrax expander facilitated anteroposterior and lateral maxillary expansion.
- The patient underwent 12 days of active distraction followed by 2 months of conventional face mask therapy.
- After 16 months, a 5-degree increase in the S-N-A angle was observed, indicating skeletal correction.
- Significant improvement in the patient's hypernasality was achieved.
Implications:
- Internal distraction osteogenesis is an effective treatment for maxillary hypoplasia in cleft lip and palate patients.
- This technique can comprehensively improve both skeletal discrepancies and associated hypernasality.
- DO offers a promising solution for enhancing functional and aesthetic outcomes in complex craniofacial cases.
