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Introduction: Conventional fixed-bearing knee prostheses have been proved to be clinically successful in elderly individuals with low activity levels. Polyethylene wear and loosening remain important problems with current fixed-bearing knee prostheses. In mobile-bearing knee prosthesis rotation of polyethylene insert is allowed and the contact area of the articular surface can be greatly increased and there can be a consequent reduction in contact stresses, and decreased polyethylene wear and there is decreased constraint forces at the bone and tibial prosthesis interface leading to decreased loosening. The objective of this study were to assess the clinical outcome of the procedure, to assess the complication rate of bearing dislocation associated with mobile bearing prosthesis, to compare our results with those of other similar studies and to compare the results of the study with those of fixed bearing prosthesis done earlier in our institute. Materials and Methods: This prospective study involved 30 total knee arthroplasties which were performed on 20 patients using Low Contact Stress (LCS) prosthesis. The patients were assessed preoperatively and pos-operatively clinically and radiologicallyat each visit and also using the Knee Society Rating System. The Depuy (Johnson & Johnson) LCS total knee arthroplasty was used in this study. Results: Total of 30 total knee arthroplasties were performed using low contact stress prosthesis in 20 patients. The mean post-operative knee society knee and function scores in the present study were 89.2 (range, 73-97) and 87 (range, 75-100), at mean follow-up period of 16 months. Our study has shown excellent results in 26 knees and good results in 4 knees. Conclusion: LCS prosthesis TKR showed excellent clinical outcome with excellent improvement in the pain relief scores, this study was comparable with other studies and those of studies on total knee replacement with fixed bearing prosthesis performed earlier in the same institute.

Introduction: Pott's disease or Pott's disease is a form of tuberculosis that occurs outside the lungs whereby disease is seen in the vertebrae. Tuberculosis can affect various tissues apart from the lungs including the spine, a kind of tuberculous arthritis of the inter-vertebral joints and it is usually termed as extra-pulmonary tuberculosis. The disease involving the spine is named after Percivall Pott (1714-1788), a British surgeon. The lower thoracic and upper lumbar vertebrae are the areas of the spine most often affected. Materials and methods: 12 patients with active spinal tuberculosis with severe kyphosis, neurological deficits and radiologically evident disease were included. Aim was to evaluate the efficacy and clinical outcomes of posterior surgical approach and posterior instrumentation in the management of tuberculosis of spine. Results: Total 12 patients were included 6 males and 6 females with average age being 37.2 years.3 patients had history of tuberculosis in the past. Two patients had pleural effusion; one patient had tuberculosis of the elbow. The average number of vertebra involved is 1.8 (range 1-3 vertebra). 10 cases had cold abscess with tubercular debris (wet lesion).And two cases were dry lesions. Graft consolidation and functional outcome was excellent in most of cases and good in remaining cases. Conclusion:The posterior approach to Thoraco lumbar spine has many advantages and it doesn't have complications associated with the other approaches. Our results show that single stage circumspinal decompression + anterior spinal fusion + posterior Moss-Miami instrumentation + posterior spinal fusion through posterior approach is an alternative treatment for Thoraco lumbar spinal tuberculosis. It is a minimum surgical intervention that has minimum morbidity compared to other approaches and encourages neurological recovery, good correction and prevention of progressive kyphosis.