scholarly journals Participation of Opiate and Serotonergic Systems in Brain Conditioning Stimulatory Inhibition of the Potentials Evoked by Tooth Pulp Stimulation in the Pars Caudalis of the Trigeminal Sensory Nucleus of the Rat

1986 ◽  
Vol 42 (1) ◽  
pp. 51-61
Author(s):  
Reizo INOKI ◽  
Masafumi OKA ◽  
Sadaaki MAEDA ◽  
Katsuya IWATSUBO
Keyword(s):  
Tooth Pulp ◽  
Sensory Nucleus

18. The properties of neurons in trigeminal subnucleus oralis which respond to tooth-pulp stimulation in the cat

1985 ◽  
Vol 308 (1136) ◽  
pp. 424-424
Keyword(s):  
Thermal Stimulation ◽  
Tooth Pulp ◽  
Nuclear Complex ◽  
Facial Stimuli ◽  
Trigeminal Neurons ◽  
Minimal Trauma ◽  
Sensory Nucleus ◽  
Trigeminal Nuclear Complex ◽  
Stimulation Of

In cats prepared with minimal trauma, many neurons at all levels of the trigeminal nuclear complex show responses to thermal stimulation of the teeth at temperatures which would cause pain in man (Clarke & Matthews 1983). We wondered which other types oforo-facial stimuli would excite trigeminal neurons with tooth-pulp input in such minimally traumatized cats. In particular, we were interested in neurons in the rostral divisions of the complex (main sensory nucleus and spinal subnucleus oralis), which are not usually associated with the transmission of impulses related to pain.

Activity of rostral trigeminal sensory neurons in the cat during wakefulness and sleep

1995 ◽  
Vol 73 (6) ◽  
pp. 2486-2498 ◽  
Author(s):  
B. E. Cairns ◽  
M. C. Fragoso ◽  
P. J. Soja
Keyword(s):  
Stimulus Intensity ◽  
Action Potentials ◽  
Tooth Pulp ◽  
Behavioral State ◽  
Active Sleep ◽  
Quiet Sleep ◽  
Low Intensity ◽  
Naturally Occurring ◽  
Response Profile ◽  
Sensory Nucleus

1. Relatively little is known about the activity of trigeminal sensory neurons during naturally occurring behavioral states of sleep and wakefulness. Accordingly, experiments were performed in chronic unanesthetized behaving cats in which neuronal activity in the rostral trigeminal sensory nuclear complex (TSNC) was recorded extracellularly in response to low-intensity stimulation of mandibular and maxillary divisions of cranial V nerve. The peripheral responses of TSNC neurons were evaluated during naturally occurring episodes of wakefulness, quiet sleep, and active sleep. 2. The location of the rostral TSNC was confirmed by recording characteristic orthodromic field potentials generated in response to afferent volleys from tooth pulp and inferior alveolar (IAN) nerve stimuli. Antidromic fields from the trigeminal (MotV) and facial (MotVII) motor pools were used to demarcate the anterior and posterior limits of the rostral TSNC (i.e., main sensory nucleus and nucleus oralis pars gamma). 3. In the absence of peripherally applied stimuli, individual rostral TSNC neurons recorded in the chronic, unanesthetized cat during the behavioral state of wakefulness did not display ongoing spike activity. 4. The response characteristics of individual TSNC neurons to low-intensity stimuli delivered to V afferents emanating from the canine tooth pulps during the behavioral state of drowsy wakefulness consisted of a short train of action potentials characterized by a short latency-to-onset (7.2 +/- 0.4 ms, mean +/- SE, n = 51). TSNC neurons fell into two categories on the basis of their response to graded intensities of tooth pulp stimuli. "Stimulus intensity-dependent" neurons demonstrated evoked responses that had a response profile that increased with stimulus intensity. In contrast, the response profile of "stimulus intensity-independent" neurons remained stable irrespective of the stimulus intensity used. 5. During episodes of wakefulness and quiet sleep, IAN-evoked orthodromic fields did not differ in their amplitude or other waveform parameters. However, during active sleep, the IAN-evoked orthodromic field potential was suppressed by an average of 28% as compared with wakefulness. 6. The number of action potentials evoked by consecutive presentation of low-intensity tooth pulp stimuli were compared during sleep and wakefulness. The evoked responses were suppressed during active sleep (29%, n = 42). Suppression observed during active sleep occurred in both ("stimulus-dependent" and "stimulus-independent") groups of TSNC neurons. During the phasic rapid-eye-movement (REM) episodes of active sleep, both the orthodromic field potentials and unitary action potentials were further suppressed or abolished. 7. The conclusion is reached that synaptic transmission through the rostral trigeminal sensory nucleus is dependent on the behavioral state of the animal.(ABSTRACT TRUNCATED AT 400 WORDS)

Production and release of the opioid peptides induced by bradykinin in the tooth pulp.

Ensho ◽  
1987 ◽  
Vol 7 (2) ◽  
pp. 181-185
Author(s):  
Teruo Kudo ◽  
Masato Kuroi ◽  
Huei-Ling Chang ◽  
Reizo Inoki
Keyword(s):  
Opioid Peptides ◽  
Tooth Pulp

Maximum Temperature Through a Yttrium Stabilized Zirconia Ceramic After Er,Cr:YSGG Laser Irradiation

2020 ◽  
Vol 02 ◽  
Author(s):  
Laurel Stringer ◽  
Sarah Malley ◽  
Darrell M. Hutto ◽  
Jason A. Griggs ◽  
Susana M. Salazar Marocho
Keyword(s):  
High Speed ◽  
Potential Method ◽  
Maximum Temperature ◽  
Zirconia Ceramic ◽  
Tooth Pulp ◽  
Control Group ◽  
Stabilized Zirconia ◽  
Significant Difference ◽  
Power Setting ◽  
Group A

Background: The most common approach to remove yttria stabilized zirconia (YSZ) fixed-dental prostheses (FDPs) is by means of diamond burs attached to a high-speed handpiece. This process is time-consuming and destructive. The use of lasers over mechanical instrumentation for removal of FDPs can lead to efficient and predictable restoration retrievability. However, the heat produced might damage the tooth pulp (>42˚C). Objective: The purpose of this study was to determine the maximum temperature (T) reached during the use of different settings of the erbium, chromium:yttrium-scandium-gallium-garnet Er,Cr:YSGG laser through a YSZ ceramic. Methods: YSZ slices (1 mm thick) were assigned into 7 groups. For the control group, a diamond bur was used to cut a 1 mm groove into the YSZ slices. For the 6 experimental groups, the laser was operated at a constant combination of 33% water and 66% air during 30 s with two different power settings (W) at three frequencies (PPS), as follows (W/PPS): 2.5/20, 2.5/30, 2.5/45, 4.5/20, 4.5/30, 4.5/45. The T through the YSZ slice was recorded in degrees Celsius by using a digital thermometer with a K thermocouple. Results: The median T of the control group was 26.5˚C. The use of 4.5 W resulted in the median T (˚C) of 44.2 at 20 PPS, 53.3 at 30 PPS, and 58.9 at 45 PPS, while 2.5 W showed 34.6, 31.6, and 25.0 at 20, 30, and 45 PPS, respectively. KruskalWallis one-way ANOVA showed that within each power setting, the T was similar. The high power and lowest frequency (4.5/20) showed no significant difference from the 2.5 W settings and the control group. Conclusion: The lower power setting (2.5 W) is a potential method for the use of the Er,Cr:YSGG laser to debond YSZ structures. The higher power (4.5 W) with high frequencies (30 and 45 PPS) is unsuitable.

Peptidergic nerves in human tooth pulp

1984 ◽  
Vol 92 (4) ◽  
pp. 319-324
Author(s):  
MATS GRÖNBLAD ◽  
PÄIVI LIESI ◽  
ANNE MARIE MUNCK
Keyword(s):  
Human Tooth ◽  
Tooth Pulp ◽  
Peptidergic Nerves

Serotonin inhibits release of substance P evoked by tooth pulp stimulation in trigeminal nucleus caudalis in rabbits

1991 ◽  
Vol 30 (1) ◽  
pp. 5-13 ◽  
Author(s):  
N. Yonehara ◽  
T. Shibutani ◽  
Y. Imai ◽  
Y. Ooi ◽  
T. Sawada ◽  
...  
Keyword(s):  
Substance P ◽  
Tooth Pulp ◽  
Trigeminal Nucleus ◽  
Trigeminal Nucleus Caudalis
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