Modelling and optimization of temperature in orthopaedic drilling: an in vitro study.
This present investigation uses the Taguchi and response surface methodology (RSM) for modelling and optimization of the temperature produced during bone drilling. The drilling of bone is a common procedure in orthopaedic surgery to produce hole for screw insertion to fixate the fracture devices and implants. A major problem which is encountered during such a procedure is the increase in temperature of the bone due to the plastic deformation of chips and the friction between the bone and the drill. The increase in temperature can result in thermal osteonecrosis which may delay healing or reduce the stability and strength of the fixation. The drilling experiments are conducted on poly-methyl-meth-acrylate (PMMA) (as a substitute for bone) using Taguchi's L27 experimental design technique. The cutting parameters used are drill diameter, feed rate and cutting speed. The optimum cutting parameters for minimum temperature are determined by using S/N ratios and the effect of individual cutting parameters on temperature produced is evaluated using analysis of variance (ANOVA). A second-order model is established between the drilling parameters and temperature using RSM. The experimental results show that the drill diameter is the most significant drilling parameter affecting the temperature during drilling followed by cutting speed and feed, respectively. The values predicted and the values obtained from experiment are fairly close, which indicates that the developed RSM model can be effectively used to predict the temperature in orthopaedic drilling.
Department of Mechanical Engineering, Indian Institute of Technology Patna, India.
Rupesh Kumar
RK
Pandey
Department of Mechanical Engineering, Indian Institute of Technology Patna, India.
Sudhanshu Sekhar
SS
Panda
D000704:Analysis of Variance; D001842:Bone and Bones / Q000502:physiology; D008962:Models, Theoretical; D019637:Orthopedic Procedures; D019904:Polymethyl Methacrylate / Q000737:chemistry; D015203:Reproducibility of Results; D013696:Temperature
D019904:Polymethyl Methacrylate