Abstract

The effects of changes in the moment of the superficial masseter muscle on its metabolic activity were studied. By cementation of a high inclined plane on the lower incisors, the bite was opened and the mandible was displaced posteriorly, so decreasing the moment of the muscle. A low inclined plane did not decrease the moment of the muscle but changed the pattern of normal proprioception. The high inclined plane appeared to decrease the functional activity of the muscle as revealed by fluorometric analyses of phosphocreatine, ATP. glucose. G-6-P and lactate. The low inclined plane, however, probably increased the functional activity of the superficial masseter muscle.

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