Prosthodontics & Occlusion · single question
What is the purpose of a facebow?
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Correct answer: B. Records the relationship between the maxilla and the hinge axis of the mandible (TMJ)
A facebow's specific purpose is to transfer the relationship of the maxillary arch to the transverse horizontal (hinge) axis of the mandible/TMJ, allowing the maxillary cast to be mounted on an articulator at the correct distance from the simulated hinge axis — this preserves accurate arc-of-closure movement during articulation, which is more specific than simply relating the maxilla to the skull in general.
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