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What is In recording the border movement in the vertical plane, name the tracing produced by it: and explain in detail?
Border movement is the mandibular movement at the limits dictated by anatomic structures as viewed in a given plane.
Border movement recorded in: 
• Horizontal plane produces characteristic 'diamond tracing'.
• Sagittal plane produces 'Beak tracing.
• Vertical plane produces 'Shield tracing'
• Combination of border movements in all three planes produces 'Envelop' of motion.