The mechanical forces arising from transpedicular drilling were analysed as a basis for the construction of a semi-active light constructed robot guided by a navigation system. For evaluation of the cutting forces, the drilling and milling of artificial bone and of animal spine and scapula were performed. Medical and industrial drilling- and milling cutters were tested with medical machines. The data was analysed using the software “Matlab”.
Tests were carried out to establish the optimal angle of entry into the dorsal area of the vertebra, because this has a huge impact on both the cutting forces and the quality of the drill hole,. The Date was then analysed, again the software “Matlab” as well as the software “Amira” for visualisation. The optimal position of the pedicle screw could be calculated by creating 3D models of the first lumbar vertebrae by using CT-data. Furthermore, using this method the entrance angle of the drill at the dorsal vertebra, the mean length of the pedicle screws, the angle between the axis of the pedicle screw and the sagital plane and the thickness of the dorsal cortical bone in the area of the pedicle screw entry could be evaluated.
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The mechanical forces arising from transpedicular drilling were analysed as a basis for the construction of a semi-active light constructed robot guided by a navigation system. For evaluation of the cutting forces, the drilling and milling of artificial bone and of animal spine and scapula were performed. Medical and industrial drilling- and milling cutters were tested with medical machines. The data was analysed using the software “Matlab”.
Tests were carried out to establish the optimal angle...
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