Plagmann H C, Wartenberg M, Kocher T
Dtsch Zahnarztl Z. 1989 Apr;44(4):285-8.
A clinical trial examined the effect of calculus removal on the enamel surface using a Gracey curette 5/6, an ultrasound unit, and three air scalers with five different tips, in terms of the rate of surface lesions and the extent and depth of the defects. A total of 140 teeth were copied to assess and measure the surface lesions. The hand-held instrument did not damage the tooth surface. For calculus removal with automatic instruments surface lesions were observed to be a function of the type of equipment and the tip configuration used, with sharp-edged instruments causing the more severe destruction. Therefore automatic calculus removal instruments should not be used for routine tooth cleaning. They should be reserved for first-time removal of old, hard, and very tough calculus.
一项临床试验研究了使用格雷斯刮治器5/6、超声设备以及三种带有五种不同尖端的气动洁牙机去除牙石对牙釉质表面的影响，包括表面病变的发生率以及缺损的范围和深度。总共复制了140颗牙齿来评估和测量表面病变。手持器械未损伤牙齿表面。对于使用自动器械去除牙石，观察到表面病变是所用设备类型和尖端配置的函数，边缘锋利的器械造成的破坏更严重。因此，自动牙石去除器械不应常规用于牙齿清洁。它们应留作首次去除陈旧、坚硬且非常坚韧的牙石。
