Which class of articulator would you choose to simulate complex jaw movements including protrusion and lateral movements?

• A. Class 4
• B. Class 3
• C. Class 2
• D. Class 1

Answer: (A)

To reproduce complex jaw movements like protrusion and lateral excursions, you need an articulator that can be tailored to the patient’s exact path of motion. Simple hinge devices only allow opening and closing and can’t simulate sideways or forward movements. Average-value, non-adjustable articulators provide generic paths and can’t reflect individual condylar guidance or incisal guidance. Semi-adjustable units let you set some key factors, but they still fall short for matching the full multi-directional path of a real patient. A fully adjustable articulator, by contrast, lets you customize the condylar guidance, Bennett angle, immediate side shift, and incisal guidance, so you can accurately simulate protrusion and lateral movements. That is why the fully adjustable (class IV) articulator is the best choice.