Horiguchi S, Yamada T, Inokoshi S, Tagami J
Tokyo Medical and Dental University, Faculty of Dentistry, Department of Operative Dentistry, Japan.
Oper Dent. 1998 Sep-Oct;23(5):236-43.
The purpose of this study was to evaluate selective caries removal using an air-abrasive technique. Alumina powders, glass beads, crushed glass powders, and crushed powders of polycarbonate resin were applied to intact human enamel, dentin, and artificially demineralized dentin (caries-model dentin). Furthermore, the effect of the particle size of abrasives and air pressures on the abraded depths was examined. When alumina powders and glass beads were used, the abraded depths of enamel, dentin, and caries model increased as the particle size and air pressure increased. Alumina powders and crushed glass powders abraded intact enamel and dentin more than the caries-model dentin, whereas glass beads abraded the caries-model dentin more than the intact enamel and dentin. Only crushed powders of polycarbonate resin abraded the caries-model dentin without reducing intact enamel and dentin. With hard particles, such as alumina powders, glass beads, or crushed glass powders, selective caries removal by the air-abrasive technique appeared to be difficult to achieve, even if the particle size and the air pressure were changed. Crushed powders of polycarbonate resin that reduced only the caries-model dentin are harder than caries-model dentin, but softer than intact enamel and dentin. This study elucidated the possibility of selective carious dentin removal with the air-abrasive technique.
本研究的目的是评估使用空气喷砂技术进行选择性龋损去除。将氧化铝粉末、玻璃珠、碎玻璃粉末和聚碳酸酯树脂碎末应用于完整的人牙釉质、牙本质以及人工脱矿牙本质（龋损模型牙本质）。此外，还研究了磨料颗粒大小和气压对磨损深度的影响。当使用氧化铝粉末和玻璃珠时，牙釉质、牙本质和龋损模型的磨损深度随着颗粒大小和气压的增加而增加。氧化铝粉末和碎玻璃粉末对完整牙釉质和牙本质的磨损比对龋损模型牙本质的磨损更大，而玻璃珠对龋损模型牙本质的磨损比对完整牙釉质和牙本质的磨损更大。只有聚碳酸酯树脂碎末能磨损龋损模型牙本质而不减少完整牙釉质和牙本质。对于诸如氧化铝粉末、玻璃珠或碎玻璃粉末等硬颗粒，即使改变颗粒大小和气压，似乎也难以通过空气喷砂技术实现选择性龋损去除。聚碳酸酯树脂碎末仅磨损龋损模型牙本质，其硬度比龋损模型牙本质大，但比完整牙釉质和牙本质小。本研究阐明了使用空气喷砂技术选择性去除龋损牙本质的可能性。
