A method for identifying otological drill milling through bone tissue wall
- 2 April 2011
- journal article
- research article
- Published by Wiley in International Journal of Medical Robotics and Computer Assisted Surgery
- Vol. 7 (2), 148-155
- https://doi.org/10.1002/rcs.382
Abstract
Background Otological drill milling through the bone tissue wall is a common milling fault in ear surgery. This paper presents a method for identifying milling faults and improving operation safety. Methods Force and current sensors are used. According to a DC motor model and a cutting force model, the features of the milling process were analysed and a dynamic model was established. The dynamic model could extract the characteristic curve of a milling fault and the phase difference between the current and force signals. An adaptive filter was designed to fuse the phase and amplitude of signals to suppress interference in the characteristic curve. According to the filtering result, milling states can be identified by a rule base. Results Five surgeons carried out experiments on calvarian bone. The average recognition rate of milling faults was 90%. Only 1% of normal millings were identified as milling faults. Conclusions This method could be adapted to different surgeons and identify milling faults exactly. Copyright © 2011 John Wiley & Sons, Ltd.Keywords
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