Assistant Professor, Department of Periodontics, Stony Brook Dental School, Stony Brook, NY.
Senior R&D Engineer, Convergent Dental, Needham, MA.
Implant Dent. 2019 Oct;28(5):463-471. doi: 10.1097/ID.0000000000000923.
To measure the temperature rise and surface damage of titanium dental implants and the surrounding tissue in a pig jaw during 9.3-μm carbon dioxide (CO2) laser irradiation at various durations of time.
Thermal analysis tests were performed on 12 implants with the same surface. Twelve implants mounted alone or in pig jaws were laser-irradiated with a 9.3-μm CO2 laser using 3 different power settings. The temperature of the implant body and the proximal tissues was measured with a J-Type Thermocouple after being laser-irradiated with 3 different power setting for 30, 60 seconds, and 2 minutes. Scanning electron microscope (SEM) and digital microscope images were also taken of the all the implants before and after laser irradiation to detect the presence or absence of surface damage.
Temperature analysis showed that in all cases the implant and the proximal tissue temperatures remained around the start temperatures of the implant and tissues with fluctuations of ±3°C but never reached the upper threshold of 44°C, the temperature at which thermal injury to bone has been reported. Digital and SEM images that were taken of the implants showed an absence of surface damage at the cutting speed of 20% (0.7 W); however, cutting speeds of 30% to 100% (1.0-4.2 W) did yield surface damage.
Laser irradiation of titanium implant surfaces using a 9.3-μm carbon dioxide laser with an average power of 0.7 W showed no increase in thermal temperature of the implant body and tissue temperatures as well as no evidence of implant surface damage.
测量猪颌骨中钛牙科种植体及其周围组织在不同时间的 9.3μm 二氧化碳（CO2）激光照射下的温升和表面损伤。
对 12 个具有相同表面的种植体进行了热分析测试。将 12 个单独或植入猪颌骨的种植体用 9.3μm CO2 激光以 3 种不同功率设置进行激光照射。在以 3 种不同功率设置照射 30、60 秒和 2 分钟后，用 J 型热电偶测量种植体体和近侧组织的温度。还对所有种植体进行了激光照射前后的扫描电子显微镜（SEM）和数字显微镜图像拍摄，以检测表面损伤的存在与否。
温度分析表明，在所有情况下，种植体和近侧组织的温度都保持在种植体和组织的起始温度附近，波动在±3°C 以内，但从未达到 44°C 的上限，即据报道热损伤骨的温度。对种植体进行的数字和 SEM 图像拍摄显示，在切削速度为 20%（0.7W）时，没有表面损伤；然而，切削速度为 30%至 100%（1.0-4.2W）时，确实会产生表面损伤。
使用平均功率为 0.7W 的 9.3μm 二氧化碳激光对钛种植体表面进行激光照射，不会导致种植体体和组织温度升高，也不会导致种植体表面损伤。
