铒-钇铝石榴石激光进行窝洞预备时牙髓温度的升高
Cavity preparation by Er-YAG laser on pulpal temperature rise.
作者信息
Oelgiesser Dan, Blasbalg Jaron, Ben-Amar Ariel
机构信息
Laser Clinic, The Maurice and Gabriela Goldschleger, School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel.
出版信息
Am J Dent. 2003 Apr;16(2):96-8.
PURPOSE
To measure the intrapulpal temperature changes in vitro, during cavity preparation and caries removal, using the Opus 20 Er-YAG laser plotted as a function of the laser energy and pulse rate.
MATERIALS AND METHODS
Class I and V cavity preparations were made in 175 fresh extracted caries-free human teeth and caries removal was carried out in 42 carious extracted teeth by the Opus 20 Er-YAG laser. K-type thermocouples were inserted into the pulp chambers filled with heat conducting paste. Lasing was carried out at different irradiation energies and pulse frequencies, using air-water spray. Temperature changes in the pulp chamber were measured during lasing.
RESULTS
In all groups tested, the maximum temperature rise was lower than 5.5 degrees C, which is considered as critical value for pulp vitality. The highest temperature values were measured during Cl I preparations (3.13 degrees C +/- 1.54 - 4.11 degrees C +/- 1.29), medium values were in Cl V in enamel (2.38 degrees C +/- 1.37 - 4 degrees C +/- 1.07) and the lowest were in cementum (2.10 degrees C +/- 0.61 - 3.61 degrees C +/- 1.15) and during caries removal (1.21 degrees C +/- 0.46 - 3.51 degrees C +/- 0.68).
目的
使用Opus 20铒激光，测量体外窝洞制备和龋坏去除过程中牙髓腔内的温度变化，并将其绘制为激光能量和脉冲频率的函数。
材料与方法
在175颗新鲜拔除的无龋人牙上制备I类和V类窝洞，并使用Opus 20铒激光对42颗龋坏拔除牙进行龋坏去除。将K型热电偶插入充满导热膏的牙髓腔中。使用空气-水喷雾，以不同的照射能量和脉冲频率进行激光照射。在激光照射过程中测量牙髓腔内的温度变化。
结果
在所有测试组中，最高温度升高低于5.5℃，这被认为是牙髓活力的临界值。在I类窝洞制备过程中测得的最高温度值（3.13℃±1.54 - 4.11℃±1.29），在V类窝洞的釉质中为中等值（2.38℃±1.37 - 4℃±1.07），在牙骨质中最低（2.10℃±0.61 - 3.61℃±1.15），在龋坏去除过程中最低（1.21℃±0.46 - 3.51℃±0.68）。
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