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口腔科军医们对牙齿硬组织的修复工作,往往离不开牙鑽。牙鑽的急剧旋转无可避免地给病人一种震动、酸痛、发烫、发麻等感觉,有时也可弄伤軟组织,而且鑽孔的速度不高。用超声波鑽孔机鑽孔则完全消除了这些缺点,使病人在毫无不适感觉的情况下进行牙齿的修复工作,因此超声波鑽孔机在口腔科的应用将是很有前途的。构造由两大部分组成:一部分为超音频电流振荡器,由一个能产生频率在16-30千周的正弦波振荡电路和一级或二极放大电路构成;另一部分为超声波发射装置,由一个高频励磁镍圈,一个磁致伸缩材料的蕊子(最好用镍,也可用殷钢等合金),外
Stomatology Medicare teeth on the hard tissue repair work, often inseparable from the dental drill. The rapid rotation of the dental drill inevitably gives the patient a feeling of vibrations, soreness, irritation, tingling and the like, sometimes also injuring the soft tissue, and the drilling speed is not high. Drilling holes with an ultrasonic drilling machine completely eliminates these shortcomings and allows the patient to repair the teeth without any discomfort, so the application of ultrasonic drilling machines in dentistry will be promising. The structure is composed of two parts: one is a super audio current oscillator, which consists of a sine wave oscillation circuit and a first-level or two-pole amplification circuit capable of generating a frequency of 16-30 thousands weeks; the other part is an ultrasonic transmission device, High-frequency excitation nickel ring, a magnetostrictive material Ruizi (preferably nickel, also available Invar and other alloys), outside