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Arch coordination does not affect the stability in class III orthognathic surgery patients
Sung Ok Hong1, Dong-Mok Ryu, Deok-Won Lee
1From the *Department of Oral and Maxillofacial Surgery, Kyung Hee University Dental Hospital at Gang-dong; and †Department of Oral & Maxillofacial Surgery, School of dentistry, Kyung Hee University, Seoul, Korea.
The Journal of Craniofacial Surgery
|November 14, 2013
Summary
Pre-orthodontic arch coordination did not significantly impact orthognathic surgery stability. While some mandibular horizontal dimensions showed instability, skeletal factors remained stable, indicating minimal overall treatment outcome effects.
Area of Science:
- Orthodontics and Dentofacial Orthopedics
- Surgical and Medical Procedures
Background:
- Orthognathic surgery aims to correct skeletal discrepancies.
- Short-term stability after surgery is crucial for treatment success.
- The role of pre-existing arch coordination in surgical stability is not fully understood.
Purpose of the Study:
- To investigate the effect of pre-orthodontic arch coordination on the short-term stability following orthognathic surgery.
- To evaluate specific cephalometric changes including B point, menton, overjet, and overbite.
Main Methods:
- Comparative study of 20 healthy Korean adults (10 with insufficient and 10 with sufficient arch coordination).
- All subjects underwent sagittal split ramus osteotomy and Le Fort I maxillary surgery.
- Cephalometric analysis of presurgical, postsurgical, and 3-month follow-up data using V-ceph software.
Main Results:
- Insufficient arch coordination did not significantly affect overall treatment outcomes.
- A significant difference was observed in mandibular horizontal dimensions (B point, overjet), indicating orthodontic instability.
- Skeletal factors demonstrated stability, while vertical dimensions (B point, menton, overbite) were not statistically significant.
Conclusions:
- Pre-orthodontic arch coordination appears to have a limited impact on the short-term stability of orthognathic surgery.
- Orthodontic factors, particularly horizontal mandibular dimensions, may exhibit instability post-surgery.
- Skeletal stability is generally maintained, suggesting successful surgical outcomes regardless of initial arch coordination.
