Activation of intradental nerves in the dog to some stimuli applied to the dentine.

摘要: Abstract Both scraping of superficial dentine and air blasts induced bursts action potentials in 19 out 22 units immediately. In 5 16 4.9 mol/l CaCl2-solution was also effective. Dry absorbent cotton activated with a 10–20 s latency. All 18 tested responded to mechanical irritation the pulp. Acid etching made more sensitive. Resin impregnation abolished responses. Drilling turbine bur responses same type as blasts. Three heat 2 cold. Hypertonic NaCl-solution only effective when applied either pulp (in 9 12 units) or inner 17 units). It is concluded that intradental nerve fibres sensitive several different stimuli exist dog. Many used induce fluid flow dentinal tubules vitro. Nerve activation might have been due mechanism all used, possibly distortion peripheral tissue result flow. The findings support hydrodynamic hypothesis sensitivity.