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Twenty-seven patients who had hip arthroplasty operated on with trochanteric osteotomy were compared with 54 patients when the direct lateral approach was used. The strength of the hip abductors, adductors, extensors, and flexors were measured at least 2 years following surgery. The strength of these muscle groups recovered to the same level as those on the(More)
The plastic components of 280 retrieved unicondylar and total knee arthroplasties were studied. Wear was visually scored using a relative ranked data method. Although wear on the components was highly variable, several conclusions could be drawn regarding the nature and causes. Wear was associated more with the medial than the lateral condyle. Delamination(More)
A series of 26 patients was studied before and after total knee replacement to determine the change in their quality of life, expressed as a gain in Quality Adjusted Life Years (QALYs). Global health status was assessed using the Nottingham Health Profile, disability by the Harris scale, pain by the McGill Pain Questionnaire, and anxiety and depression by(More)
Eighteen New Zealand white rabbits underwent prosthetic replacement of the meniscus which was attached to the intercondylar area of the tibia through a predrilled hole and around the internal surface of the capsule by sutures, in one knee, and meniscectomy alone in the contralateral knee. The animals were killed 3 and 6 month after implantation.(More)
In this scanning electron microscopic study blocks of collagen fibrils were prepared from human articular cartilage, using two techinques which selectively removed either the proteoglycans alone, or both the proteoglycans and the collagen fibrils, of the non-calcified cartilage layer. Amino acid analysis of the fibrils confirmed the purity of the collagen(More)
The use of a rapid prototyping method was utilised to produce a pre-operative solid model of the proximal tibia in a patient with a massive defect of the medial tibial plateau. The solid model was reconstructed from aligned sequential CT images of the knee. This was then used to determine the level of bone resection of the proximal tibia for the optimum(More)
The tibio-fibular interosseous membrane was studied in the scanning electron microscope. It is made up of two fibrous networks, a major one composed of large diameter fibres aggregated into bundles and a fine filamentous network, without a preferred orientation, between these main fibre bundles. Mechanical studies have shown that the interosseous membrane(More)
Oscillating saws and rotary drills are the most common instruments used in orthopaedic surgery for the cutting of bone and the drilling of holes through the cortex in preparing surfaces for implants to be placed on the bone ends. To obtain precision of placement of the surfaces and holes, various techniques have been developed to guide the instruments,(More)
  • R J Minns
  • 1982
The performance of a footswitch which uses conductive rubber modules in foam, sandwiched between two brass shims in the form of an inner sole placed between the foot and the shoe is reported. Contact switching force decreases with module density, whilst position of the conductivity plugs in the footswitch is irrelevant. Comments on the construction of a(More)