Miyairi H, Nagai M, Fukuda H, Muramatsu A
Shika Rikogaku Zasshi. 1981 Apr;22(58):136-42.
By the introduction of the diamond instruments and carbide burs measurably improved the quality and ease of cavity preparation, the several kinds of the air turbine handpieces, that is, standard type, torque type and miniature type air handpieces have been recently developed. In this paper, the performance tests of these air turbine handpieces have been carried out, and obtained the relations are indicated speeds and the vertical and horizontal loads or torque using the test bur. These relations are indicated by the logarithmic expressions, N = N0 - CvFv gamma, where N is the rotational speed of the air turbine handpieces during rotation, N0 is the free rotational speed of the air turbine handpieces, Fv is the vertical loads on the tests burs and Cv and gamma is the experimental constants. And then, the maximum performed work or the air turbine handpieces is presented by the expression as follows. W max = pimicrod/60(1/Cv)1/ gamma gamma (N0/gamma + 1)(1 + gamma)/gamma And we proposed the formula to be calculated for the performance ability of the air turbine handpieces.
通过引入金刚石器械和硬质合金车针显著提高了窝洞预备的质量和便利性，最近已开发出几种空气涡轮手机，即标准型、扭矩型和微型空气手机。本文对这些空气涡轮手机进行了性能测试，并使用测试车针得出了指示速度与垂直和水平载荷或扭矩之间的关系。这些关系用对数表达式表示，N = N0 - CvFvγ，其中N是空气涡轮手机旋转时的转速，N0是空气涡轮手机的自由转速，Fv是测试车针上的垂直载荷，Cv和γ是实验常数。然后，空气涡轮手机的最大做功由以下表达式给出。W max = πμd/60(1/Cv)1/γγ(N0/γ + 1)(1 + γ)/γ 并且我们提出了用于计算空气涡轮手机性能能力的公式。
