The structures that control mandibular movement are divided into those influencing which portions of the mandible?

The structures that control mandibular movement are divided into those influencing which portions of the mandible?

• A. Anterior and Posterior
• B. Superior and Inferior
• C. Right and Left
• D. Medial and Lateral

Answer: (A)

Mandibular movement is shaped by two sets of determinants: anterior determinants and posterior determinants. Anterior determinants come from the anterior teeth and the guidance they provide during protrusive and lateral movements, setting how the jaw moves at the front and how anterior contacts influence excursion. Posterior determinants come from the posterior structures—the condylar guidance and the contacts of the posterior teeth—which influence the path and position of the mandible during closure and posterior occlusion. This division explains why the structures that control movement are described as influencing the anterior versus the posterior portion of the mandible. The other directional terms don’t capture this clinically important split in how movement is guided.

Mandibular movement is shaped by two sets of determinants: anterior determinants and posterior determinants. Anterior determinants come from the anterior teeth and the guidance they provide during protrusive and lateral movements, setting how the jaw moves at the front and how anterior contacts influence excursion. Posterior determinants come from the posterior structures—the condylar guidance and the contacts of the posterior teeth—which influence the path and position of the mandible during closure and posterior occlusion. This division explains why the structures that control movement are described as influencing the anterior versus the posterior portion of the mandible. The other directional terms don’t capture this clinically important split in how movement is guided.