[Evaluation of the degree of restoration of function with fixed molar bridges]

The purpose of this study was to determine the degree of restoration of masticatory function with fixed molar bridges. Evaluations were made of the deep temperature of the masseter muscle, masticatory performance and occlusal contacts (duration, force distribution, area and number of contacts). Criteria were established for the parameters above mention in 30 normal subjects. Fixed bridges were placed in 10 patients with missing only the mandibular first molar. Measurements were carried out both prior to and after placement of the prosthesis. The following results were obtained. 1. The deep temperature of the masseter muscle patients recovered in 30 days after prosthesis. 2. The total number of contact points and contact area increased after placement by 30 days. 3. The duration of occlusal contacts increased up to 30 days after placement. 4. The force distribution of occlusal contacts decreased for a time but recovered as the normal subjects after 30 days. 5. The masticatory performance was restored immediately after the placement and showed no change by 45 days.