Medical Drill Wear Classification Using Servomotor Drive Signals and Neural Networks

Medical drills are subject to intensive wear due to the influence of different mechanical, chemical and thermal factors characteristic for drilling and sterilization process. Wear progress increases friction in the cutting zone, which consequently leads to higher temperatures and cutting forces, i.e., possible thermal and mechanical damages of the bone tissue. Therefore, the presented study aimed to analyze the possibility of drill wear monitoring using electric servomotor drive signals and neural network algorithm. Experimental work has been performed with adequately designed testbed machining system and using prepared bovine bone samples. Drill wear features were extracted from time and frequency domain of the process signals, and then analyzed separately and in combinations.

[1]  B. Yegnanarayana,et al.  Artificial Neural Networks , 2004 .

[2]  J. Singh,et al.  A national survey of instrument sharpening guidelines. , 2010, The surgeon : journal of the Royal Colleges of Surgeons of Edinburgh and Ireland.

[3]  R M Jochum,et al.  Influence of multiple use of Timedur-titanium cannon drills: thermal response and scanning electron microscopic findings. , 2000, Clinical oral implants research.

[4]  Marko Horvat,et al.  UNIVERSITY OF ZAGREB FACULTY OF MECHANICAL ENGINEERING AND NAVAL ARCHITECTURE , 2016 .

[5]  S. Karmani.  The thermal properties of bone and the effects of surgical intervention , 2006 .

[6]  L. S. Matthews,et al.  Temperatures measured in human cortical bone when drilling. , 1972, The Journal of bone and joint surgery. American volume.

[7]  Erkki Jantunen,et al.  A summary of methods applied to tool condition monitoring in drilling , 2002 .

[8]  Anju Vyas.  Print , 2003 .

[9]  Yoed Rabin,et al.  A new thermal model for bone drilling with applications to orthopaedic surgery. , 2011, Medical engineering & physics.

[10]  Rogério Margonar,et al.  Evaluation of immediate bone-cell viability and of drill wear after implant osteotomies: immunohistochemistry and scanning electron microscopy analysis. , 2008, Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons.

[11]  Sean R. H. Davidson,et al.  Heat transfer in bone during drilling , 1999 .

[12]  Edwin A McGlumphy,et al.  Heat production by 3 implant drill systems after repeated drilling and sterilization. , 2006, Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons.

[13]  Radford C. Tanzer,et al.  Temperature measured in human cortical bone when drilling , 1972 .

[14]  Paul William Prickett,et al.  An overview of approaches to end milling tool monitoring , 1999 .

[15]  G. Augustin,et al.  Cortical bone drilling and thermal osteonecrosis. , 2012, Clinical biomechanics.