Al-Maliky Mohammed Abbood, Zardawi Faraedon Mostafa, Meister Jörg, Frentzen Matthias, Al-Karadaghi Tamara Sardar
Department of Biomedical Applications, Institute of Laser for Postgraduate Studies, University of Baghdad, Baghdad, Iraq.
Department of Dentistry, Al-Hadi University College, Baghdad, Iraq.
Aust Endod J. 2022 Apr;48(1):65-71. doi: 10.1111/aej.12591. Epub 2021 Nov 29.
To measure the transmitted laser power in the coronal, middle and apical root thirds during vertical and horizontal irradiation of laser. 14 mm length whole roots and longitudinal root sections were irradiated using a 940 nm diode laser with 0.5 W in continuous mode for 5 s. A power detector was placed in front of the root apex for the vertical transmitted power measurement and placed laterally to root surface for the horizontal transmission experiment. The transmitted power from the root apex vertically was 53% of the irradiated power, while for the horizontal transmission experiment for the coronal, middle and apical root thirds were 25.6%, 40.4% and 41.3%, respectively. Irradiation of root canals with 940 nm laser power can be transmitted during vertical irradiation in more than 50% of the samples, whereas less transmission happens with horizontal irradiation at apical and middle root third than coronal.
为了测量激光垂直和水平照射期间在牙根冠部、中部和根尖三分之一处的透射激光功率。使用940 nm二极管激光器以0.5 W连续模式对14 mm长的完整牙根和纵向牙根切片照射5 s。在根尖前方放置功率探测器以测量垂直透射功率，在牙根表面侧面放置功率探测器以进行水平透射实验。从根尖垂直方向的透射功率为照射功率的53%，而对于牙根冠部、中部和根尖三分之一处的水平透射实验，透射功率分别为25.6%、40.4%和41.3%。用940 nm激光功率照射根管时，在垂直照射期间超过50%的样本中激光可以透射，而在牙根中部和根尖三分之一处水平照射时的透射率低于冠部。
