< Topic > Offer the instrument which improves the surgical dentistry device.Solutions The surgical device and the especially dentistry device, the rotary motor which drives the tool (1) and the instrument which one which the aforementioned motor (1) at least decides one action parameter sensor (H1 and H2) with it has at least (100) with, the motor (1) electronic type servo control module (3) and the aforementioned instrument (100) the soft connected section which is connected to the aforementioned electronic type module (3) electrically consist of (2). This instrument (100) the sensor (H1 and H2) it processes the output signal and at the same time through the soft connected section (2), the digital electronic circuit which that output signal is transmitted in the aforementioned electronic type module (3) it consists of (4).【課題】外科的歯科装置を改良した器具を提供すること。【解決手段】外科装置、特に歯科装置は、工具を駆動する回転モータ(1)と前記モータ(1)の少なくとも一つの作用パラメータを決定する少なくとも一つのセンサー(H1,H2)とを備えた器具(100)と、モータ(1)の電子式サーボ制御モジュール(3)と、前記器具(100)を前記電子式モジュール(3)に電気的に接続する柔軟連結部(2)とから成る。この器具(100)はセンサー(H1,H2)の出力信号を処理し且つ柔軟連結部(2)を介してその出力信号を前記電子式モジュール(3)に伝達するディジタル電子回路(4)から成る。