Search for dissertations about: "screw"
Showing result 1 - 5 of 111 swedish dissertations containing the word screw.
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1. Mechanical optimization of orthopaedic bone screw constructs
Abstract : Orthopaedic screw implants are crucial in surgical procedures for bone structures, with a longstanding issue being screw loosening. Improving screw stability requires an enhanced understanding of the bone-implant interactions and associated failure mechanisms. This knowledge can be used to optimize screw designs. READ MORE
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2. Fixation of Spinal Implants : Clinical and Experimental Studies on the Effects of Hydroxyapatite Coating
Abstract : Loosening of implants is a frequent complication in orthopaedic surgery. The aim of this thesis was to evaluate hydroxyapatite coating of pedicle screws with mechanical and histological methods and to correlate the results with the radiological findings.Hydroxyapatite (HA) coating of pedicle screws was investigated in experimental studies in sheep. READ MORE
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3. Boundary lubrication in screw-nut transmissions
Abstract : This report deals with the function of screw-nut transmissions (powerscrews). Two aspects of this function have been investigated. Owing to different running parameters, primarily sliding speed and average pressure between the sliding surfaces of the thread, the coefficient of friction and the efficiency will vary within wide limits. READ MORE
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4. Bearing lubrication of refrigeration screw compressors
Abstract : The bearings in a modern refrigeration screw compressor are lubricated with a mixture of oil and refrigerant. However, little or no published bearing life data is available for the new generation non-chlorinated refrigerants. READ MORE
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5. Subchondral screw fixation in treating cervical hip fractures
Abstract : .... READ MORE