Which term best describes the disclusion of posterior teeth during protrusive movement?

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Multiple Choice

Which term best describes the disclusion of posterior teeth during protrusive movement?

Explanation:
During forward (protrusive) movement, the anterior teeth guide the mandible so that the posterior teeth separate and stop contacting. This separation is described as disclusion of posterior teeth. It reflects how anterior guidance acts to prevent posterior interference when the jaw moves forward. The other phrases refer to disclusion during side-to-side (lateral) movements—in which disclusion may occur on the working or non-working side—or to occlusion that remains stable across movements; they’re not the term used to describe what happens specifically in protrusion.

During forward (protrusive) movement, the anterior teeth guide the mandible so that the posterior teeth separate and stop contacting. This separation is described as disclusion of posterior teeth. It reflects how anterior guidance acts to prevent posterior interference when the jaw moves forward. The other phrases refer to disclusion during side-to-side (lateral) movements—in which disclusion may occur on the working or non-working side—or to occlusion that remains stable across movements; they’re not the term used to describe what happens specifically in protrusion.

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