Twelve different types of implants were found broken in various bones during 3 years period. All the implant failures were considered to be the result of fatigue failure due to inadequate external immobilisation, early mobilisation and weight bearing.

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A case A case of spinal hydatidosis causing cauda equina syndrome is reported.

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Crevice corrosion is reported in a ‘rejected’ stainless steel nail-plate implant removed 11 months after implantation, corrosion was observed in the areas of implant which were inaccessible for cleaning and sterilization under routine practice. The implant was analysed to be biocompatible. Scrubbing of the implant with a detergent and rinsing in a jet of steaming water before autoclaving is recommended to minimize crevice corrosion.

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A total of 30 amputations amongst 25 amputees were evaluated regarding socio-economic aspect of the prosthetic fittings. In the present study in most instances prosthetic fitting did make the amputee once again a useful member of our society. We found only a little alteration in the socio-economic status of most of the amputees. The prostheses provided, were found acceptable to the majority of our patients and the time and money spent were well worth the effort.

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Comparative results of Thompson’s and Moore’s prosthesis in 40 cases of femoral neck fractures have been presented in a follow-up study of one to seven years. While excellent and good results were almost equal in both groups (60-65 per cent), the frequency of poor result was more with Thompson (30 per cent) as compared to Moore’s prosthesis (15 per cent). Major complications responsible for poor results viz. looseness of prosthesis, posterior dislocation of prosthesis, its proximal and distal migration have been discussed. Gradually increasing physical weakness, associated degenerative and rheumatoid joint disease, pressure sores over heels lowered the result grade.

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Fusion of lumbosacral spine was undertaken in 25 cases in 4 years for various pathological conditions of the lumbosacral spine. Posterior fusion was done in 12, lateral fusion in 5 and anterior fusion in 3 cases. The follow-up period ranged between 2 to 6 years. The anterior and lateral inter-transverse fusion gave good results, whereas there was a failure rate of 17.7 per cent in posterior fusion. Possible causes of pseudarthrosis were poor technique, poor grafting material and infection. Even though this series is very small to draw any definite conclusion we feel that anterior interbody fusion should be the method of choice, whenever possible.

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Twentyfour cases of missile injuries of the vertebral column and spinal cord with neurological deficit were studied. Twelve were treated by exploration and decompression, laminectomy in 11 and anterior decompression in one. Remaining 12 cases were treated conservatively like any other case of traumatic paraplegia. In the operated group 6 cases showed improvement and 3 died while in conservative group 8 cases showed appreciable neurological improvement and none died. Surgery does not appear to help much in cases of missile injuries, with severe neural deficit.

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Fiftyeight cases of radiologically proved bony lesions were subjected to aspiration cytology of which 14 were reported to be metastatic ones from thyroid, lung, prostate, kidney, breast, nasopharynx and occult primaries. In these metastatic lesions the cytodiagnosis was confirmed by histopathological examination from bony lesions in 8 cases, from primary sites in 2 patients and from both primary as well as metastic lesions in 4 patients. Cytologic diagnosis was the primary one in all these cases except one.

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A case of adamantinoma, a rare epithelial tumour of long bones, is reported in a young female with involvement of tibia.

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A 12 year old girl with back-ache and paraplegia due to osteoblastoma of the spine at L1 is presented. The paraplegia recovered promptly after laminectomy and irradiation.

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Hydatid disease of bone is an uncommon clinical condition. It is located in certain isolated pockets in the world. Clinical diagnosis is many a times missed and is diagnosed after a biopsy. The treatment is difficult because of late presentation and diffuse nature of the infestation. During a period of 6 years we have treated 5 cases. Of these one was cured, 2 had satisfactory result and 2 were untraceable. The treatment of choice has been radical surgery with or without local irrigation with fresh super saturated saline solution or formaldehyde with fresh super saturated saline solution or formaldehyde solution.

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Results of excision arthroplasty performed in 20 patients of intra-articular ankylosis of temporomandibular joints are reported. These were graded as good in 14, fair in 5 and poor in 1 patient. The operative procedure consisted of unilateral or bilateral condylectomy along with excision of coronoid process in patients with ankylosis of long duration. Wide excision of the mandible creating a gap of 2 cm or more without any interposition or traction gave good or fair results in over 90 percent cases.

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An unusual case of aortic aneursym presenting as tuberculosis of spine clinically and radiologically is presented.

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Quality of metal, hardness and mechanical stability of 4 implants, which fractured during post-operative period, were analysed. Hardness of similar implants of different manufacturers varied to a great extent. Contents of molybdenum in all the fractured implants was less than the recommended 2 per cent. All the fractured implants had ‘hardness’ of more than 90 Rockwell-B scale.

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Mechanical failure of acetabular components is infrequent. A case of fracture of acetabular component without apparent trauma, 8 years after implantation is reported.

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