Sulieman M, Rees J S, Addy M
Division of Restorative Dentistry, Department of Oral & Dental Science, University of Bristol Dental School, Lower Maudlin Street, Bristol, BS1 2LY.
Br Dent J. 2006 Jun 10;200(11):631-4; discussion 619. doi: 10.1038/sj.bdj.4813644.
To measure the surface and pulp chamber temperature increases in vitro on upper and lower anterior teeth during a tooth whitening procedure using a diode laser.
A thermocouple was used to measure the temperature increase on the surface of an extracted upper central incisor tooth. Pulp chamber temperature readings were made on upper and lower central incisors, lateral incisors and canines. A diode laser recommended for tooth bleaching was tested at three different power settings (1W, 2W, 3W). Temperature measurements were made with and without the bleaching agent present on the labial tooth surface.
The increase in surface temperature readings ranged from 37 degrees C (1W) to 86.3 degrees C (3W) with no bleaching gel present. Pulp chamber temperature increases ranged from 4.3 degrees C (1W) to 16 degrees C (3W). The presence of the bleaching gel reduced temperature increases seen at the tooth surface and within the pulp.
The increase in the pulp chamber temperature with the laser used at 1-2W was below the critical temperature increase of 5.5 degrees C thought to produce irreversible pulpal damage. However, a power setting of 3W produced a pulp chamber temperature increase above this threshold (16 degrees C) and caution is advised when using this setting.
使用二极管激光在牙齿美白过程中测量离体上、下前牙的表面和髓腔温度升高情况。
使用热电偶测量拔除的上颌中切牙表面的温度升高。对上、下颌中切牙、侧切牙和尖牙进行髓腔温度读数。对一种推荐用于牙齿漂白的二极管激光在三种不同功率设置（1W、2W、3W）下进行测试。在唇侧牙表面有和没有漂白剂的情况下进行温度测量。
在没有漂白凝胶的情况下，表面温度读数的升高范围为37摄氏度（1W）至86.3摄氏度（3W）。髓腔温度升高范围为4.3摄氏度（1W）至16摄氏度（3W）。漂白凝胶的存在降低了在牙齿表面和髓腔内观察到的温度升高。
使用1 - 2W激光时髓腔温度的升高低于被认为会产生不可逆牙髓损伤的临界温度升高5.5摄氏度。然而，3W的功率设置使髓腔温度升高超过了该阈值（16摄氏度），建议在使用此设置时要谨慎。
