Kosarieh E, Bolhari B, Sanjari Pirayvatlou S, Kharazifard M J, Sattari Khavas S, Jafarnia S, Saberi S
Laser Research Center of Dentistry, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran.
Laser Research Center of Dentistry, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Department of Endodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
Photodiagnosis Photodyn Ther. 2021 Mar;33:102136. doi: 10.1016/j.pdpdt.2020.102136. Epub 2020 Dec 9.
This study aimed to investigate the penetration depth of two different dyes after root canal preparation using PIPS and SWEEPS methods.
A total of 60 single-rooted human teeth which were extracted for periodontal reasons were collected and stored in the sterile saline until using in the study. The crowns of the teeth were cut such that the remaining piece was 12 mm long. The root canals were prepared. Teeth were divided randomly into two initial groups (n = 30): indocyanine green solution (ICG) and methylene blue solution. Then, these teeth were divided into final subgroups (n = 10): Er:YAG laser irradiation with PIPS(photon-induced photoacoustic streaming) technique, Er:YAG laser irradiation with SWEEPS(shock-wave enhanced emission photoacoustic streaming) technique, and no irradiation. The penetration depth measurements were done by the stereo microscope in three zones of each specimen.
The difference between ICG in the control group and PIPS and SWEEPS in the coronal area was not significant. In the middle section the difference between PIPS and the control group was marginally insignificant (P = 0.053). In the methylene blue group, PIPS had significantly higher penetration depth in the apical area compared to the control group (P = 0.004). In the middle section, both PIPS and SWEEPS showed significantly higher penetration than the control group.
According to the results of this study, the laser has the potential to increase the penetration of methylene blue. Root canal preparation with the PIPS technique can increase the dye penetration. However, the SWEEPS technique and the conventional method have a similar outcome in terms of dye penetration.
本研究旨在调查使用光子诱导光声流（PIPS）和冲击波增强发射光声流（SWEEPS）方法进行根管预备后两种不同染料的渗透深度。
共收集60颗因牙周原因拔除的单根人牙，保存在无菌盐水中直至用于本研究。将牙冠切断，使剩余部分长12mm。进行根管预备。牙齿随机分为两个初始组（n = 30）：吲哚菁绿溶液（ICG）组和亚甲蓝溶液组。然后，将这些牙齿分为最终亚组（n = 10）：采用PIPS技术的铒钇铝石榴石激光照射组、采用SWEEPS技术的铒钇铝石榴石激光照射组和未照射组。通过体视显微镜在每个标本的三个区域进行渗透深度测量。
对照组中的ICG与冠部区域的PIPS和SWEEPS之间的差异不显著。在中间部分，PIPS与对照组之间的差异微乎其微（P = 0.053）。在亚甲蓝组中，与对照组相比，PIPS在根尖区域的渗透深度显著更高（P = 0.004）。在中间部分，PIPS和SWEEPS的渗透均显著高于对照组。
根据本研究结果，激光有增加亚甲蓝渗透的潜力。采用PIPS技术进行根管预备可增加染料渗透。然而，就染料渗透而言，SWEEPS技术和传统方法有相似的结果。
