Harder Sönke, Egert Christopher, Freitag-Wolf Sandra, Mehl Christian, Kern Matthias
Int J Oral Maxillofac Implants. 2018 Jan/Feb;33(1):72-78. doi: 10.11607/jomi.6222.
Implant-supported dental prostheses are based on the principle of osseointegration, and the success of dental implantation depends on adequate formation of this intimate bone-to-implant contact. The application of heat during the drilling procedure leads to a rise in intraosseous temperature at the prospective implant site, which may result in various complications. The purpose of the present study was to compare the ability of thermocouples and infrared thermography to detect changes in intraosseous temperature during dental implant site preparation.
Standardized bovine costae bone blocks were used to simulate the cortical bone of the human mandible. Steel implant form drills with a diameter of 3.0 mm were used. Two types of irrigation systems were used (external cooling only and combined internal and external cooling). Drilling was performed at a constant speed (1,200 rpm). Changes in intraosseous temperature were evaluated using Type T Cu-CuNi thermocouples and an infrared thermography camera system at contact pressures of 5 and 20 N.
Infrared thermography detected significantly greater increases in intraosseous temperature (ΔT) than thermocouples for all tested combinations of cooling system and contact pressure (P ≤ .0001).
These results suggest that thermography more accurately reflects intraosseous temperature changes during implant site preparation than thermocouples.
种植体支持的牙修复体基于骨结合原理，牙种植的成功取决于这种紧密的骨与种植体接触的充分形成。在钻孔过程中施加热量会导致预期种植部位的骨内温度升高，这可能会导致各种并发症。本研究的目的是比较热电偶和红外热成像技术在牙种植部位制备过程中检测骨内温度变化的能力。
使用标准化的牛肋骨骨块模拟人类下颌骨的皮质骨。使用直径为3.0 mm的钢制种植体成形钻。使用两种类型的冲洗系统（仅外部冷却和内部与外部联合冷却）。以恒定速度（1200转/分钟）进行钻孔。在5 N和20 N的接触压力下，使用T型铜-铜镍热电偶和红外热成像相机系统评估骨内温度的变化。
对于冷却系统和接触压力的所有测试组合，红外热成像检测到的骨内温度升高（ΔT）明显大于热电偶（P≤0.0001）。
这些结果表明，与热电偶相比，热成像在种植部位制备过程中能更准确地反映骨内温度变化。
