CNRS, Laboratoire Modélisation et Simulation Multi-Échelle, Créteil, France.
CNRS, Institut de Mécanique et d'Ingénierie, Talence, France.
Ultrasound Med Biol. 2020 Jun;46(6):1464-1473. doi: 10.1016/j.ultrasmedbio.2020.01.025. Epub 2020 Mar 3.
Ultrasound techniques can be used to characterize and stimulate dental implant osseointegration. However, the interaction between an ultrasonic wave and the implant-bone interface (IBI) remains unclear. This study-combining experimental and numerical approaches-investigates the propagation of an ultrasonic wave in a dental implant by assessing the amplitude of the displacements along the implant axis. An ultrasonic transducer was excited in a transient regime at 10 MHz. Laser interferometric techniques were employed to measure the amplitude of the displacements, which varied 3.2-8.9 nm along the implant axis. The results demonstrated the propagation of a guided wave mode along the implant axis. The velocity of the first arriving signal was equal to 2110 m.s, with frequency components lower than 1 MHz, in agreement with numerical results. Investigating guided wave propagation in dental implants should contribute to improved methods for the characterization and stimulation of the IBI.
超声技术可用于表征和刺激牙种植体骨整合。然而，超声波与种植体-骨界面（IBI）之间的相互作用尚不清楚。本研究结合实验和数值方法，通过评估沿种植体轴的位移幅度，研究了超声波在牙种植体中的传播。在 10MHz 的瞬态状态下激励超声换能器。采用激光干涉技术测量位移幅度，沿种植体轴的位移幅度变化为 3.2-8.9nm。结果表明，沿种植体轴传播了一种导波模式。第一个到达信号的速度等于 2110m/s，频率成分低于 1MHz，与数值结果一致。研究牙种植体中的导波传播应该有助于改进 IBI 的表征和刺激方法。
