Kotsanos N, Makris G
Hell Stomatol Chron. 1988 Oct-Dec;32(4):243-8.
An air-powder jet abrasive system has recently been introduced for stain removal from teeth. The purpose of this study was to investigate whether its abrasive effect on enamel and on the root renders these surfaces more caries prone. The AIR-FLOW (EMS SA) abrasive was directed for 30 seconds on predetermined (test) sites of the crown and the root of each of 10 teeth, under controlled conditions. These and adjacent (control) sites in the form of windows, were then exposed to an acid gel for caries-like lesion formation. The central sections of each window were examined under the polarizing microscope. The enamel treated with the abrasive appeared somewhat roughened while the root showed crater-like abrasion defects averaging 303 mm (+/- 140) in depth. The mean depth of enamel test lesions was 253 mm (+/- 77) and that of control lesions 98 mm (+/- 77), the difference being statistically significant (p less than 0.001). The corresponding values for the root lesions were 695 mm (+/- 103) and 695 mm (+/- 120) respectively. Consequently, enamel surface modification by AIR-FLOW decreased the resistance of enamel to caries-like lesions in vitro and it is postulated that this may also happen at "susceptible sites" in vivo. Loss of cementum and superficial dentine abraded by AIR-FLOW was significant but did not lead to increased root susceptibility to caries-like lesions in vitro.
一种气粉喷射研磨系统最近已被引入用于去除牙齿污渍。本研究的目的是调查其对牙釉质和牙根的研磨作用是否会使这些表面更易患龋齿。在可控条件下，将AIR-FLOW（EMS SA）研磨剂对准10颗牙齿中每颗牙齿牙冠和牙根的预定（测试）部位30秒。然后，这些呈窗口形式的测试部位及其相邻（对照）部位暴露于酸性凝胶中以形成类龋损。在偏光显微镜下检查每个窗口的中央部分。经研磨剂处理的牙釉质表面略显粗糙，而牙根则呈现出平均深度为303毫米（±140）的火山口状磨损缺陷。牙釉质测试损的平均深度为253毫米（±77），对照损的平均深度为98毫米（±77），差异具有统计学意义（p小于0.001）。牙根损的相应值分别为695毫米（±103）和695毫米（±120）。因此，AIR-FLOW对牙釉质表面的改性在体外降低了牙釉质对类龋损的抵抗力，据推测在体内的“易感部位”也可能发生这种情况。AIR-FLOW磨损的牙骨质和表层牙本质的损失显著，但在体外并未导致牙根对类龋损的易感性增加。
