[Satisfactory results with roof-cover plasty for hip dysplasia and dysplasia with arthritis].
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Biomedical subjects
Publications and source records attributed to S Sijbrandij.
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Marked deformities of the skeleton may develop in the severe form of osteogenesis imperfecta. Internal fixation can be effective in the treatment and prevention of fractures and deformities. Eight years ago, axial correction of deformities of the femora and tibiae by manual osteoclasis was carried out in a 7 year old girl in whom osteogenesis imperfecta had produced severe bowing of the long bones of the legs. Internal metal splints were introduced percutaneously to lie partially in, and partially alongside, the bone, to obtain fixation in the correct position. This treatment resulted in the prevention of refracture of the legs, while correction was maintained.
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Internal fixation of fractures of the shafts of long tubular bones by intramedullary nailing has become established worldwide. It is an efficient and successful procedure. Closed nailing has several advantages, but the technique is often difficult and sometimes impossible if reduction is unsuccessful. To facilitate reduction a special instrument has been constructed which can be used via the intramedullary route. It has proved to be a useful device which makes closed nailing easier, the operation time shorter and the procedure safer. A description of the instrument and the way it can be used is given.
A study of limb lengthening by distraction epiphysiolysis in the rabbit tibia is presented. For this purpose a special external distraction device was developed, which allowed 10 mm lengthening of the leg. Bone formation in the distraction zone was quantified by means of computed tomography. Cross-sectional scan planes at 1.5 mm separation revealed bone formation proceeding for several weeks after the end of the distraction period. A period of bone remodeling followed, resulting in the formation of a solid cortical structure, similar to the diaphysis, in the distraction zone.
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A one stage operation by the posterior route has been carried out in a series of nine patients for the reduction and fusion of severe spondylolisthesis and spondyloptosis. For this purpose special instruments have been designed to exert a controlled force on the displaced vertebra in two perpendicular directions. Technical details of the procedure are reported. Bone is resected from the sacrum and the fifth lumbar vertebra to avoid too much tension on the nerve roots. After the reduction L5 is held in place by two screws and a sacral bar. The lumbosacral kyphosis seen in severe spondylolisthesis can also be corrected by this method. Bone grafts from the ileum or tibia are not needed and lumbosacral fusion is achieved within 3-6 months because of the close contact between the raw bone of the vertebral bodies. All patients achieved a sound fusion with significant remission of symptoms.
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A modification of a previously reported one-stage technique for reduction and stabilisation of severe spondylolisthesis using a posterior route is described. Reduction is obtained by inserting Harrington rods to lift L5 vertically out of the pelvis and two double-threaded screws to pull it backwards. After reduction the rods are taken away and stabilisation achieved by means of screws and a sacral bar. With this modified technique lumbar vertebrae above L5 are never immobilised, compared with the previous method where the retention of the Harrington rods resulted in more lumbar vertebrae being immobilised than was necessary for fusion. Bone is resected from the sacrum and the fifth lumbar vertebra to avoid too much tension on the nerve roots. Bone grafts are not needed and lumbosacral fusion is achieved within six months due to close contact between the raw bone of the vertebral bodies. Three patients have been treated with this modified technique; there was no reslip, neither during the period when the metallic fixation was in situ nor after its removal.
Ten subcapital resection osteotomies were performed in nine patients with severe slipped capital femoral epiphysis. The risks of this operation are discussed and the operative technique is described in detail. In one patient postoperative chondrolysis of the hip joint developed, which resulted in a stiff but painless hip. With subcapital osteotomy, normal anatomy and mobility of the hip joint can be restored, except for shortening of the femoral neck by one or two cm. At follow-up, ranging from two to 10 years, correction of the deformity and good function of the joint have been maintained.
The different methods described in the literature for the reduction of severe spondylolisthesis are reviewed. The case histories of two girls with neurological deficits in their legs due to Grade IV spondylolisthesis are described. Reduction and fusion by the posterior route in a one-stage operation were performed on these patients. For this purpose special instruments have been designed to exert a controlled force on the displaced vertebra in two perpendicular directions. Technical details of the procedure are reported. In both patients intervertebral and posterolateral fusion were carried out. Fusion was successful and redisplacement did not occur. There have been only few descriptions in the literature of a technique that reduces and stabilises spondylolisthesis in one stage. However, only patients with Grade III and IV spondylolisthesis require reduction and in less severe cases fusion without reduction is sufficient.
The proximal tibio-fibular joint consists of a joint cavity surrounded by a joint capsule (diarthrosis) forming a rather rigid joint. In patients who complain of pain and instability in the knee, the cause may sometimes be found in laxity of the proximal tibio-fibular joint. In these cases the abnormal movements of the fibular head are palpable and visible and can be demonstrated on X-ray films. The disease is not well known and is often overlooked. It can be differentiated by palpating the fibular head. In two patients the pain and disability were so severe that fusion of the proximal tibio-fibular joint was undertaken. This treatment seems to have been successful.
For the surgical treatment of tumours in long bones a technique in which the resected bone segment is autoclaved and replaced is described. The results in three patients who had undergone this operation 7 to 11 years previously, one for chondrosarcoma and two for giant cell tumour, are reported. In all three cases sound union has been achieved. The advantages of boiled autografts are the immediate availability and the excellent fit of the graft. In order to avoid the problem of slow union of the autoclaved bone segment rigid fixation with long-term stability, preferably with a Küntscher nail and the use of supplementary fresh autogenous bone, is necessary. Two patients with traumatic bone loss from the femoral shaft treated in a similar way are reported from the literature.
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