INBDE (Integrated National Board Dental Examination) 2025 – 400 Free Practice Questions to Pass the Exam

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Question: 1 / 1180

What type of movement occurs in the lower joint space of the TMJ?

Hinge rotation

In the lower joint space of the temporomandibular joint (TMJ), hinge rotation occurs. This movement involves a simple rotational motion around a fixed point, allowing for the opening and closing of the jaw in a hinge-like fashion. This movement primarily takes place in the lower compartment of the TMJ.

Option B, gliding movement, typically occurs in the upper joint space of the TMJ, known as the articular disc, where the condyle can glide smoothly forward and backward during jaw movements.

Option C, lateral excursion, refers to the sideways movement of the mandible towards the right or left side.

Option D, protrusion and retraction, involve the forward and backward movement of the mandible respectively.

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Gliding movement

Lateral excursion

Protrusion and retraction

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