Oral Neurophysiology Research Group, Dental School, University of Dundee, Dundee DD1 4HN, Scotland.
Muscle Nerve. 2013 Aug;48(2):256-64. doi: 10.1002/mus.23806. Epub 2013 May 3.
The aims of this study were to establish a safe technique for selective stimulation of nerves in human tooth-pulp during long experiments and to validate its use even with stimuli of high intensities.
A custom-made veneer containing 2 silver wire-conductive cream electrodes was attached with cement to the labial surface of an upper central incisor tooth. A variety of stimulus intensities were applied, and sensory and reflex responses from jaw-closing muscles were recorded.
In 15 participants, the stimuli evoked predominantly sharp or painful sensations and reflex inhibitions of activity in the jaw muscles. Stimulation of 3 non-vital teeth evoked no sensations or reflexes, even at intensities that evoked maximal reflexes in vital teeth. The electrodes had reasonably stable resistances throughout experiments lasting up to 90 min.
The method described enables responses to low- or high-intensity stimulation of human pulpal nerves to be investigated in long experiments.
本研究旨在建立一种在长时间实验中对人牙髓神经进行选择性刺激的安全技术，并验证即使使用高强度刺激也能使用该技术。
将一个包含 2 个银线导电膏电极的定制贴面用水泥固定在上颌中切牙的唇面。施加各种刺激强度，并记录来自闭口肌的感觉和反射反应。
在 15 名参与者中，刺激主要引起尖锐或疼痛的感觉以及咀嚼肌的反射抑制。即使在刺激非活力牙齿的强度达到刺激活力牙齿时最大反射的强度下，也没有引起感觉或反射。电极在长达 90 分钟的实验中具有相当稳定的电阻。
所描述的方法可用于研究长时程实验中人类牙髓神经的低强度或高强度刺激反应。
