Which statement accurately describes the data used by fully adjustable articulators to replicate mandibular movements?

• A. Three-dimensional dynamic registrations
• B. Two-dimensional static registrations
• C. Only a single static registration
• D. No registration required

Answer: (A)

To faithfully reproduce mandibular movements on a fully adjustable articulator, you need motion data that captures how the jaw moves through space over time, not just a single moment. Three-dimensional dynamic registrations provide the continuous path of the mandible and the condyles across opening, closing, protrusion, and lateral movements, giving precise spatial coordinates over time. This rich 3D, time-based data lets you set the articulator’s parameters—condylar inclination, Bennett movement, incisal guidance—to mirror the patient’s actual motion, so the simulated paths align with functional occlusion. In contrast, two-dimensional static registrations capture only a single pose in one plane and miss depth and movement, while a lone static registration or no registration cannot reproduce the trajectory of real mandibular movement.