Diagnostic Skills Exam (DSE) Objective Structured Clinical Exam (OSCE) Practice Exam

When a patient experiences pain while swallowing while wearing a mandibular partial denture, the most likely cause is overextension of the lingual flange. This condition arises when the flange, which should comfortably contour to the patient's oral anatomy, extends too far beyond what is necessary. This overextension can irritate the surrounding tissues, particularly the floor of the mouth, leading to discomfort during activities such as swallowing.

The lingual flange needs to provide adequate support and retention without causing trauma to the oral mucosa. If it extends excessively, it can cause friction and pressure, resulting in pain and difficulty while swallowing.

Other factors like TMJ disorders, excessive ridge resorption, or improper denture fit may contribute to discomfort, but they typically involve different mechanisms or locations of pain. For instance, TMJ disorders usually present with pain related to jaw movement, while excessive ridge resorption often leads to instability rather than localized pain. Improper denture fit generally would showcase broader issues across the denture's stability and function, which may not specifically relate to swallowing. Therefore, the most direct and likely cause of swallowing pain in this situation is indeed overextension of the lingual flange.