Effect of tooth temperature on activities of slowly adapting periodontal mechanoreceptors during or after long-lasting strong pressure applied to the cat upper canine tooth.
Periodontal mechanosensitive units (PM units) responsive to mechanical stimulation of this tooth were recorded from single fibres isolated from the superior alveolar nerve. Mechanical stimulation was applied in a sequence of long-lasting strong pressure followed by a train of weak stimuli. Temperature was changed by perfusing the pulpal cavity of the stimulated tooth with saline solution at a temperature of 5-45 degrees C. The response of the PM units elicited by strong pressure was initially dynamic and subsequently static. The dynamic response was little affected by tooth temperature whereas, the static response increased with the rise in temperature. After strong pressure the excitability of the PM units was depressed transiently, followed by gradual recovery; this depression was especially prominent when tooth temperature was high.
Tabata
T
T
Department of Physiology, Tohoku University School of Dentistry, Sendai, Japan.
Karita
K
K
D000818:Animals; D001831:Body Temperature; D002415:Cats; D003799:Dental Stress Analysis; D008465:Mechanoreceptors / Q000502:physiology*; D010513:Periodontal Ligament / Q000294:innervation*; D013314:Stress, Mechanical