Which muscles are primarily involved in teeth clenching?

Correct answer: B. Temporalis

• A. The lateral pterygoid is primarily responsible for mouth opening/protrusion, not clenching (closing).
• B. Correct. The temporalis, along with the masseter and medial pterygoid, is a primary elevator muscle involved in jaw closing/clenching.
• C. While medial pterygoid does contribute to elevation/clenching, temporalis is highlighted as the primary answer in this context per the source material.
• D. Buccinator is a muscle of facial expression/cheek support, not a primary muscle of mastication for clenching.

Note: Clenching primarily involves masseter, temporalis, and medial pterygoid. Opening = lateral pterygoid.