Diagnosis for pulpitis by means of pulpal blood flow

为了建立一种通过测量牙髓血流量诊断牙髓炎的新方法，我们研制了一种新的牙髓血流量测量仪。首先，我们调查的影响，增加激光功率的传输激光信号从重要的和非重要的牙齿，在实现更好的评估与传输激光流量计的人牙髓活力的希望。实验对象为15名22-28岁的受试者，共61颗活髓牙（上中切牙19颗、上侧切牙16颗、上尖牙16颗、第一前磨牙10颗）和5颗非活髓牙（根管充填牙胶）。为了与发射的激光一起使用，使用常规激光多普勒流量计（LDF）装置的探针内的纤维，一个用于将光发射到唇表面上，另一个用于在同一牙齿的腭表面处接收光，如先前所报道的。激光输出功率为 ...更多信息 设置为原始的2 mW以及5、7和10 mW。在每个激光功率设置下，显示血流（BF）信号的活齿数量为：1）2 mW时12/19颗中切牙，5、7和10 mW时19/19颗中切牙，2）2、5、7和10 mW时19/19颗侧切牙，3）2 mW时0/16颗犬齿，5、7和10 mW时8、12和14颗犬齿，4）在2、5、7和10 mW下0/10第一前磨牙。因此，激光功率的增加增加了从较厚的牙齿（但不是从前磨牙）的BF检测。此外，更清晰的BF信号与心率同步，更大的被动BF变化继发于血压。(BP)在较高的激光设置下观察到变化。在非活髓牙中，没有观察到与心率或BP变化同步的信号，这表明即使在激光功率增加时，也没有用这种弹道光监测非牙髓起源的血流信号。这些结果表明，高功率透射激光可以是一个有用的工具，用于监测牙髓血流和牙髓活力的评估。少

To establish the new method for diagnosing pulpitis by means of measure pulpal blood flow, we develop a new apparatus for measuring pulpal blood flow. First, we investigate the effect of an increase in laser power on the transmitted laser signals from vital and non-vital teeth, in the hope of achieving a better assessment of human pulp vitality with the transmitted laser-light flowmeter. The experiments were carried out on total of 61 vital teeth with no restoration (19 upper central incisors, 16 upper lateral incisors, 16 upper canines, and 10 first premolars) and 5 non-vital upper central incisors (the root canals of which were filled with gutta-percha) in 15 subjects aged 22-28 years. For use with transmitted laser light, the fibers within the probe of a conventional laser Doppler flowmeter (LDF) apparatus were used, one for transmitting light onto the labial surface, the other for receiving it at the palatal surface of the same tooth, as reported previously. Laser output power was … More set at the original 2 mW and also at 5, 7, and 10 mW. The number of vital teeth displaying a blood flow (BF) signal at each laser power setting was : 1) 12/19 central incisors at 2 mW, 19/19 at 5, 7, and 10m W, 2) 19/19 lateral incisors at 2, 5, 7, and 10 mW, 3) 0/16 canines at 2 mW, but eight, twelve, and fourteen at 5, 7, and 10 mW, 4) 0/10 first premolars at 2, 5, 7, and 10 mW. Thus, an increase in laser power increased BF detection from the thicker teeth (but not from premolars). In addition, clearer BF signals synchronized with heart rate, and greater passive BF changes secondary to blood pressure. (BP) changes were observed at higher laser settings. In non-vital teeth, no signals synchronized with heart rate or BP changes were observed, indicating that no blood flow signal of non-pulpal origin was ever monitored with this ballistic light even when the laser power was increased. These results indicate that high-powered transmitted laser light could be a useful tool both for monitoring pulpal blood flow and for the assessment of tooth-pulp vitality. Less