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Published on: October 18, 2021
The use of an intermaxillary fixation screw for mandibular setback surgery
Koichiro Ueki1, Kohei Marukawa, Mayumi Shimada
1Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kanazawa University, Kanazawa, Japan. kueki@med.kanazawa-u.ac.jp
Summary
This study found that intermaxillary fixation (IMF) screws did not significantly alter skeletal stability after mandibular setback surgery. However, IMF screws offer a rigid anchor, aiding orthognathic surgery outcomes.
Area of Science:
- Orthognathic Surgery
- Craniofacial Surgery
- Skeletal Stability
Background:
- Mandibular prognathism correction often involves sagittal split ramus osteotomy.
- Maintaining skeletal stability post-surgery is crucial for successful outcomes.
- The role of intermaxillary fixation (IMF) screws in skeletal stability requires further investigation.
Purpose of the Study:
- To evaluate skeletal stability following mandibular setback surgery.
- To compare outcomes with and without the use of an intermaxillary fixation (IMF) screw.
Main Methods:
- Forty patients with mandibular prognathism underwent sagittal split ramus osteotomy with titanium plate fixation.
- Patients were divided into two groups: one with an IMF screw and one without.
- Lateral cephalograms were analyzed preoperatively and at multiple postoperative time points (1, 3, and 6 months).
Main Results:
- No significant differences in most skeletal measurements were observed between the groups over time.
- Significant differences were noted in occlusal plane and convexity between the groups.
- Repeated measure analysis of variance was used for statistical comparison.
Conclusions:
- The use of IMF screws generally does not impact time-course skeletal changes after mandibular setback surgery.
- IMF screws provide a rigid anchor, potentially benefiting the overall orthognathic surgery procedure.
- Further research may explore specific indications for IMF screw use in complex cases.
