Trial manufacture of the water jet equipment for the cavity formation and the tooth pulp removal.

1.空气净化设备或水射流设备的喷射声音非常小，由于设备没有引起恐惧心脏的高频声音，预计可以大大减少患者对声音的恐惧心理。测量结果表明，汽轮机的噪声较大，即使切换规律和大小，也能观察到噪声的体积变化。水射流比发动机显示出更小的价值，因此它是有效的降噪。2.研究了水射流技术去除软化牙本质或去除粘连的牙水泥和修复的复合树脂的可能性。使用紧凑型喷水装置，将高速水喷射到健康的牙齿物质、软化的人造牙本质、牙科粘固剂和复合树脂中。测量了高速水在每种材料表面形成的坑的直径和深度，并使用称重传感器测量了高速水对每种材料施加的载荷。当钢瓶压力为300kgf/cm2时，所有试件的重量约为45gf。结果表明，选择合适的气缸压力(300kgf/cm2)，水射流法是一种选择性去除龋齿和粘结在牙齿上的粘固剂或复合树脂而不过度磨削健康牙体的方法。

1.Jetting sound of an airbrasion equipment or an water jet equipment is very small, and it is expected that the fear heart of the patient by sound can be considerably reduced, since the equipment did not have the high frequent sound which induces the fear heart. As a result of the measurement, the noise of the turbine is big and the volume change of the noise could be observed even if law and high are switched. The water jet shows small value further than the engine and then it is effective in the noise reduction.2.The possibility of using a water-jet technique for removing softened dentin or for deleting adhered dental cements and restored composite resins was investigated. High-speed water was jetted to healthy tooth substances, softened artificial dentin, dental cements and composite resins using a compact water-jet device. The diameter and depth of the pit performed by high-speed water on the surface of each material were measured and the load applied to each material by high-speed water was measured using a load cell. When cylinder pressure was 300kgf/cm^2, all test specimens were weighted at about 45gf. As a result, it was found that water-jet technique is a method of selectively removing dental caries and the cement or composite resin adhering to teeth without over-grinding the healthy tooth substance when the proper cylinder pressure (under 300kgf/cm^2) is chosen.