Mandibular movements were recorded with the Selspot system in 16 complete denture patients, before and after treatment with mandibular OIFD. The general chewing pattern underwent only minor changes. However, some chewing cycle parameters showed obvious alterations. Increased mandibular velocity and displacement, especially in the opening phase, were registered. The cycle duration showed a tendency to decrease due to a significant shortening of the occlusion phase. This can be attributed to the stabilization of the occlusion provided by the fixed denture in the mandible.