A study on an airbration technique to remove the carious dentin

在常规的龋齿治疗中，在正确诊断后，使用高速空气涡轮打开龋齿腔，然后使用安装在低速电动发动机上的圆钢刀将龋齿探测器染色的牙本质完全去除。然后完成整个腔体和腔体边缘，然后进行修复程序。在这些过程中，去除染色的感染牙本质组织需要技巧和更长的手术时间。为了缩短麻烦的时间，我们专注于罗伯特·b·布莱克在1945年开发的气动技术。然而，该技术未能在临床上有效地切除龋齿组织。在这项研究中，我们评估了使用airbrabar技术选择性去除龋的可能性。选择了氧化铝粉、玻璃微珠、玻璃粉碎粉、聚碳酸酯树脂粉碎粉等四种空磨颗粒。在不同的粒径和气压条件下，对拔牙的切削效果进行了评价。结果表明：用聚碳酸酯树脂粉碎颗粒对牙本质和牙釉质进行空磨，对牙釉质和牙本质无明显效果，但对脱钙牙本质有较好的切割效果。因此，本研究阐明了选择性除龋的可能性。

In the conventional caries treatment, after a proper diagnosis, caries cavity is opened by using high speed air turbine, and then the carious dentin stained with Caries Detector is completely removed by using a round steel bur mounted on a low speed electric engine. The whole cavity and cavity margins are then finished, being followed by a restorative procedure. During these procedures, removing stainable infected dentin tissue requirs skill and much longer chair-time. In order to shorten the troublesome time, we forcused on the Airbration technique developed by Robert B.Black in 1945. However, this technique failed to be clinically popular to remove carious tissue effectively.In this study, we evaluated the possibility of selective caries removal using the Airbrasive technique. Four kinds of airbrasive particles, suchas : alumina powder, glass beads, glass crushed powders, and crushed powders of a polycarbonate resin were selected. Changing the conditions of particle size and air pressure the cutting effects were evaluated with extracted human teeth. The findings were as follows :The Airbrasive technique using crushed particles of polycarbonate resin on intact enamel and dentin showed no effectiveness, but succeeded to cut decalcified dentin effectively. Therefore, this study elucidated the possibility of selective caries removal.