INBDE (Integrated National Board Dental Examination) Practice Exam

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Which articulator has upper and lower members rigidly attached which provides easier control for removable prosthetics?

Arcon
Semi-arcon
Nonarcon
Fully adjustable

The correct answer is: Nonarcon

Arcon and Semi-arcon refer to articulator systems where the upper member (condylar element) is separated from the lower member (incisal element), allowing for movement and simulation of mandibular movements. However, Nonarcon is a type of articulator where the upper and lower members are rigidly attached, providing a more stable and controlled platform for removable prosthetic construction. Fully adjustable is also incorrect as it does not specify the type of articulator, and there are both arcon and nonarcon options for fully adjustable articulators. Therefore, the correct answer is C, Nonarcon.