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5Check of occlusion

Le Fort I

Pitfall: malocclusion
If an open bite and/or Class III tendency occurs when checking the occlusion, one or both mandibular condyles were malposed in posterior and/or inferior direction. In such cases, it is necessary to remove the bone plates, reapply MMF, and passively reposition the maxillomandibular complex again, assuring the condyles are properly seated. Bone plates are again applied and the occlusion verified.

The reason for a malocclusion may be the fact that the condylar heads were not positioned correctly in their respective glenoid fossae when securing MMF (as illustrated).