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[Occlusal plane orientation and postoperative anterior open bite relapse]
P Olivi1, F Cheynet, C Chossegros
1Service de chirurgie maxillofaciale et stomatologie, CHU de la Timone, boulevard Jean-Moulin, 13385 Marseille, France. pierre.olivi@ap-hm.fr
Revue De Stomatologie Et De Chirurgie Maxillo-Faciale
|October 9, 2009
Summary
Postoperative occlusal plane tilting significantly predicts relapse in open bite maxillo-mandibular deformities. A deviation greater than +/-3.75 degrees from the ideal plane increases relapse risk sevenfold.
Area of Science:
- Orthodontics
- Maxillofacial Surgery
- Cephalometric Analysis
Context:
- Maxillo-mandibular deformities, particularly open bite, often experience relapse after surgical correction.
- Existing research often presents raw data without identifying specific risk factors for relapse.
- This study investigates occlusal plane tilting as a potential predictor of long-term relapse.
Purpose:
- To evaluate the predictive value of immediate postoperative occlusal plane tilting on long-term relapse in open bite maxillo-mandibular deformities.
- To compare immediate postoperative occlusal plane tilting with an ideal theoretical plane.
Summary:
- Fifty patients with open bite maxillo-mandibular deformities were analyzed using Delaire cephalometric analysis.
- Immediate postoperative occlusal plane tilting was compared to an ideal plane, with a threshold of +/-3.75 degrees set for classification.
- Relapse was seven times more frequent in patients with a postoperative plane tilting exceeding this threshold.
Impact:
- Immediate postoperative occlusal plane tilting serves as a significant predictive factor for open bite relapse.
- This finding can help surgeons identify high-risk patients and potentially tailor treatment strategies.
- Improved understanding of relapse mechanisms can lead to better long-term outcomes in orthognathic surgery.
