A study on an airbration technique to remove the carious dentin

在传统的龋齿治疗中，在正确诊断之后，通过使用高速空气涡轮机打开龋齿腔，然后通过使用安装在低速电动发动机上的圆钢钻完全去除龋齿检测器染色的龋齿牙本质。然后完成整个空腔和空腔边缘，然后进行修复程序。在这些手术中，去除牙龈感染的牙本质组织需要技巧和更长的手术时间。为了缩短计算时间，我们采用了Robert B.Black于1945年提出的空气扰动技术。然而，这项技术未能在临床上流行，以消除龋组织有效。在这项研究中，我们评估的可能性，选择性龋去除使用Airbrasive技术。选择了氧化铝粉、玻璃微珠、玻璃碎粉和聚碳酸酯树脂碎粉等四种空气研磨颗粒。通过改变颗粒大小和气压条件，对离体牙进行切削效果评价。结果如下：使用粉碎的聚碳酸酯树脂颗粒的Airbrasive技术在完整的牙釉质和牙本质上没有表现出有效性，但成功地有效地切割脱钙牙本质。因此，本研究阐明了选择性去龋的可能性。

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.