Muscles, Movements, and Occlusion in Dentistry Practice Test

Occlusal prematurities are early bite contacts that engage before the rest of the teeth have seated, creating an interference with the normal path of closure. The description that fits this best is that they are high contacts that cause interference and abnormal muscle activity. When a premature contact is present, the jaw cannot settle smoothly into a stable intercuspal position, so the muscles must activate abnormally to accommodate or escape the interference. This muscle activity can manifest as clenching, shifts of the mandible, or tenderness with function.

These prematurities are not limited to sleep or to the front teeth; they can occur during waking function and can involve posterior teeth as well. They also have clinical significance because untreated prematurities can contribute to muscle fatigue, headaches, tooth wear, or temporomandibular issues. The other statements don’t fit because prematurities aren’t confined to sleep, aren’t restricted to anterior teeth, and do have clinical relevance.