Abstract
It is known that neurophysiological and psychophysical threshold levels (RL) for mechanoreceptors are reached at the same stimulus amplitude. Therefore, the function of periodontal mechanoreceptors in man was investigated by psychophysical methods. The effects of varying the quality of mechanical stimuli on the RL was examined. Characteristics known for mechanoreceptors elsewhere in the body, also applied to periodontal mechanoreceptors. The RL was subject to fluctuations, fatigue and rate of force application. The latter relationship was semi-logarithmic and was similar to the relationship between tooth intrusion and rate of force application, tending to indicate that the RL characteristics of mechanoreceptors are set by their binding with the environing visco-elastic tissues. No uniform directional sensitivity for axial movements could be demonstrated.
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