Monzavi Abbas, Shahabi Sima, Fekrazad Reza, Behruzi Roohollah, Chiniforush Nasim
Associate Professor, Laser Research Center of Dentistry (LRCD), School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
Associate Professor, Laser Research Center in Medical Sciences (LRCMS), AJA University of Medical Sciences-Laser Research Center of Dentistry (LRCD), School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
J Dent (Tehran). 2014 Mar;11(2):210-5. Epub 2014 Mar 31.
Peri-implantitis is one of the most common reasons for implant failure. Decontamination of infected implant surfaces can be achieved effectively by laser irradiation; although the associated thermal rise may cause irreversible bone damage and lead to implant loss. Temperature increments of over 10ºC during laser application may suffice for irreversible bone damage.
The purpose of this study was to evaluate the temperature increment of implant surface during Er:YAG laser irradiation with different cooling systems.
Three implants were placed in a resected block of sheep mandible and irradiated with Er:YAG laser with 3 different cooling systems namely water and air spray, air spray alone and no water or air spray. Temperature changes of the implant surface were monitored during laser irradiation with a K-type thermocouple at the apical area of the fixture.
In all 3 groups, the maximum temperature rise was lower than 10°C. Temperature changes were significantly different with different cooling systems used (P<0.001).
Based on the results, no thermal damage was observed during implant surface decontamination by Er:YAG laser with and without refrigeration. Thus, Er:YAG laser irradiation can be a safe method for treatment of periimplantitis.
种植体周围炎是种植体失败的最常见原因之一。激光照射可有效实现感染种植体表面的去污；尽管相关的温度升高可能会导致不可逆的骨损伤并导致种植体脱落。激光应用过程中温度升高超过10℃可能足以造成不可逆的骨损伤。
本研究的目的是评估在使用不同冷却系统的情况下，铒激光照射种植体表面时的温度升高情况。
将三个种植体植入切除的绵羊下颌骨块中，并用铒激光照射，使用三种不同的冷却系统，即水和空气喷雾、单独空气喷雾以及不使用水或空气喷雾。在激光照射期间，使用K型热电偶在种植体基台顶端区域监测种植体表面的温度变化。
在所有三组中，最大温度升高均低于10℃。使用不同冷却系统时温度变化存在显著差异（P<0.001）。
基于这些结果，在使用和不使用冷却的情况下，铒激光对种植体表面进行去污时均未观察到热损伤。因此，铒激光照射可以是一种治疗种植体周围炎的安全方法。
