Related Experiment Videos
Long-term stability after inferior maxillary repositioning by miniplate fixation
D L Baker1, P J Stoelinga, P A Blijdorp
1Department of Oral and Maxillofacial Surgery, University of Washington, Seattle.
International Journal of Oral and Maxillofacial Surgery
|December 1, 1992
Summary
Le Fort I osteotomy with inferior maxillary repositioning shows long-term stability in most patients. However, significant relapse can occur, particularly with greater inferior repositioning or combined with segmental osteotomies.
Area of Science:
- Oral and Maxillofacial Surgery
- Orthognathic Surgery
- Craniofacial Reconstruction
Background:
- Le Fort I osteotomy is a common procedure for correcting midface hypoplasia.
- Inferior repositioning of the maxilla aims to improve facial aesthetics and function.
- Stability after maxillary advancement is crucial for long-term outcomes.
Purpose of the Study:
- To evaluate the long-term stability of the maxilla after Le Fort I osteotomy and inferior repositioning.
- To identify factors associated with relapse following this surgical procedure.
- To assess the effectiveness of miniplates in stabilizing the repositioned maxilla.
Main Methods:
- Retrospective analysis of 19 patients undergoing Le Fort I osteotomy and inferior maxillary repositioning.
- Use of miniplates for rigid fixation of the maxilla.
- Postoperative follow-up ranging from 12 to 58 months to assess skeletal stability.
Main Results:
- 14 out of 19 patients (73.7%) demonstrated long-term skeletal stability.
- 5 patients (26.3%) experienced a long-term relapse exceeding 30%.
- A trend towards increased relapse was observed with >5 mm of inferior repositioning and concurrent segmental osteotomies.
Conclusions:
- Le Fort I osteotomy with inferior maxillary repositioning can achieve stable results in the majority of patients.
- Predicting vertical relapse remains challenging, with potential soft-tissue influences contributing to instability.
- Careful patient selection and surgical planning are essential, especially in cases involving significant inferior repositioning or combined procedures.