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Diagnosis for pulpitis by means of pulpal blood flow

通过牙髓血流诊断牙髓炎

基本信息

批准号：
14370611
负责人：
SASANO Takashi
金额：
$ 5.38万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14370611/
关键词：
Diagnosis for pulpitis Pulpal blood flow Pulpitis Laser Doppler flow meter New method 透過レーザー

项目摘要

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

为了建立通过测量牙髓血流来诊断牙髓炎的新方法，我们开发了一种新的牙髓血流测量装置。首先，我们研究了激光功率的增加对活体和非活体牙齿传输激光信号的影响，希望通过传输激光光流量计更好地评估人牙髓活力。实验对象为15名年龄22-28岁的受试者，共61颗未修复的活体牙齿（19颗上中切牙、16颗上侧切牙、16颗上尖牙和10颗第一前磨牙）和5颗非活体上中切牙（根管内填充有古塔胶）。为了与传输激光一起使用，使用传统激光多普勒流量计 (LDF) 装置的探头内的光纤，一根用于将光传输到唇表面，另一根用于在同一颗牙齿的腭表面接收光，如先前报道的。激光输出功率最初设置为 2 mW，也设置为 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 时为 12/19 个中切牙，5、7 和 10 m W 时为 19/19 个，2) 2、5、7 和 10 mW 时为 19/19 个侧切牙，3) 2 mW 时为 0/16 个尖牙，但在 2 mW 时为 8 个、12 个和 14 个尖牙5、7 和 10 mW，4) 首先是 0/10 前磨牙的功率为 2、5、7 和 10 mW。因此，激光功率的增加增加了对较厚牙齿（但不是前磨牙）的 BF 检测。此外，与心率同步的更清晰的 BF 信号，以及继发于血压的更大的被动 BF 变化。在较高的激光设置下观察到（BP）变化。在非活体牙齿中，没有观察到与心率或血压变化同步的信号，这表明即使激光功率增加，也没有用这种弹道光监测到非牙髓来源的血流信号。这些结果表明，高功率传输激光可以成为监测牙髓血流和评估牙髓活力的有用工具。较少的