Kahan R S, Gulabivala K, Snook M, Setchell D J
Department of Conservative Dentistry, Eastman Dental Institute, London, UK.
J Endod. 1996 Mar;22(3):105-9. doi: 10.1016/S0099-2399(96)80283-4.
Current routine methods for assessment of pulp vitality rely on stimulation of A-delta nerve fibers and give no direct indication of blood flow within the pulp. Recent papers have suggested that pulse oximeters may be used to diagnose pulp vitality by detection of blood flow. In this study, an optimized pulse oximeter probe for teeth was designed, built and tested using the Biox 3740 Oximeter (Ohmeda, Louisville, CO). Following preliminary in vitro tests, the probe was tested clinically. Pulse waveforms from maxillary and mandibular anterior teeth were noted. Simultaneous readings from the subjects' finger were used as controls. Pulse wave readings from the teeth were found to be synchronous with the finger probe, but not consistently. It was easier to maintain continuous readings from mandibular incisors than from maxillary incisors. The average percentage synchronization with the pulse was 28.95% for maxillary incisors and 50.28% for mandibular incisors. This difference was significant (p = 0.05). The overall accuracy of the commercial instrument was disappointing, and in its present form it was not considered to have clinical value.
目前评估牙髓活力的常规方法依赖于对 A-δ 神经纤维的刺激，无法直接显示牙髓内的血流情况。近期的论文表明，脉搏血氧仪可通过检测血流来诊断牙髓活力。在本研究中，使用 Biox 3740 血氧仪（Ohmeda，路易斯维尔，科罗拉多州）设计、制作并测试了一种优化的牙齿脉搏血氧仪探头。经过初步的体外测试后，该探头进行了临床测试。记录了上颌和下颌前牙的脉搏波形。同时将受试者手指的读数用作对照。发现牙齿的脉搏波读数与手指探头同步，但并不始终如此。下颌切牙比上颌切牙更容易保持连续读数。上颌切牙与脉搏的平均同步百分比为 28.95%，下颌切牙为 50.28%。这种差异具有统计学意义（p = 0.05）。该商用仪器的总体准确性令人失望，就其目前的形式而言，不认为具有临床价值。
