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Updated: Feb 8, 2026
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Designing CAD/CAM Surgical Guides for Maxillary Reconstruction Using an In-house Approach
Published on: August 24, 2018
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Surgical Accuracy in Inferior Maxillary Reposition
Kasper Stokbro1, Torben Thygesen2
1Fellow, Oral and Maxillofacial Surgical Resident, Department of Oral and Maxillofacial Surgery, Odense University Hospital, Odense; PhD Fellow, Department of Clinical Institute, Faculty of Health, University of Southern Denmark, Odense, Denmark.
Summary
Inferior maxillary repositioning in orthognathic surgery can lead to unintended posterior movement. Surgeons should account for this 1 mm relapse in surgical planning for better outcomes.
Area of Science:
- Oral and Maxillofacial Surgery
- Orthognathic Surgery
- Surgical Stability
Background:
- Inferior maxillary repositioning is a challenging orthognathic procedure known for its instability and unpredictability.
- Understanding relapse patterns is crucial for improving surgical outcomes.
Purpose of the Study:
- To investigate posterior movement following inferior maxillary repositioning.
- To identify potential causes of instability in this orthognathic procedure.
Main Methods:
- Retrospective observational study of patients undergoing inferior maxillary repositioning (2011-2013).
- Comparison of actual surgical repositioning with virtual surgical plans using dental reference points.
- Statistical analysis including paired t-tests and mixed model regression.
Main Results:
- The maxilla was repositioned 1 mm posteriorly and 0.4 mm superiorly on average, deviating from the surgical plan.
- Surgical accuracy was statistically correlated with the planned virtual repositioning.
- No other confounding variables significantly impacted the outcome.
Conclusions:
- Inferior maxillary repositioning is associated with immediate relapse, likely due to destabilization from advancement.
- A 1 mm relapse should be factored into virtual surgical planning to achieve desired maxillary positioning.
- Technological advancements like patient-specific guides may enhance precision and stability.
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