This fact is from Jaw Relations & Facebow in Prosthodontics. It is a commonly tested concept in NEET MDS examinations. Understanding this fact is crucial for answering MCQs correctly.
VDO minus VDR equals Freeway space 2-4mm
Gothic arch tracing = intraoral method = arrow point tracing
Facebow transfers hinge axis
Arbitrary facebow most common
Kinematic facebow = true hinge axis
Frankfort plane = horizontal reference