Archives of orthopaedic and trauma surgery
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Arch Orthop Trauma Surg · Jan 1984
Mechanical effects of reaming and implantation of acrylic cement into the medullary cavity of bones.
Changes in the mechanical properties of the rat femur caused by intramedullary application of bone cement were studied. In one group of animals reaming of the medullary cavity was performed, and bone cement was injected. In a control group only reaming was performed. ⋯ This may be attributed to more periosteal bone being deposited, as implantation of bone cement induced a significant increase in periosteal reaction. The elastic stiffness of the bone was not altered either by reaming or the implantation of bone cement. It is concluded that reaming and implantation of bone cement into the medullary cavity do not impair the mechanical properties of the femur in the young rat.
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Arch Orthop Trauma Surg · Jan 1984
Case ReportsPseudarthrosis resulting in complete paraplegia fifteen years after spinal fusion.
Paraplegia immediately following spinal fusion is a known problem. This case demonstrates the importance of long-term follow-up of fusion patients. Prompt attention must be given to any change in neurological status. A careful check must be made for pseudarthrosis and for secondary compression of the spinal cord as possible causes of neurological compromise.
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Arch Orthop Trauma Surg · Jan 1983
Animal experiments to examine the histology of fracture healing in osteosynthesis with external fixation and compression.
Tibia osteotomies in sheep were stabilized in nail-fixed and wire-fixed external devices with static longitudinal compression. During the 8-week study programme the mechanical situation of the osteotomies was checked via continuous measurements of interfragmentary tension, used as a functional indicator of stabilization. ⋯ Under stable osteosynthesis conditions primary bone healing occurred analogous to findings in flattened experimental shaft fractures. On grounds of varying stability performance of external pressure osteosynthesis differences in secondary healing of osteotomies were observed due to interfragmentary instability.
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Arch Orthop Trauma Surg · Jan 1983
Case ReportsRadiation induced osteosarcoma of the sacrum following radiation of an undiagnosed bone lesion.
Years ago a 20-year-old patient presented with low back pain. Radiologically a cystic lesion of the sacrum was found and interpreted as malignant tumor. Without biopsy and histological diagnosis the patient was given radiation therapy with 21 000 rad. ⋯ A pathological fracture ensued recessitating several operations. Twenty years after initial radiation therapy the patient developed a rapidly growing tumor of the sacrum, metastasizing to the lungs. One year later he died.
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Arch Orthop Trauma Surg · Jan 1983
Supination-adduction injuries of the ankle in children--radiographical classification and treatment.
Diagnostical and therapeutical problems associated with supination-adduction injuries are presented. 457 ankle fractures were collected from a retrospective material of 919 children aged 0-18 years with fractures of the tibio-fibular shaft or the ankle. The ankle fractures were classified anatomically according to Salter and Harris and traumatologically according to Gerner-Smidt. 147 fractures were classified as due to supination-adduction, of which 128 had open growth plates. The first stage, a Salter-Harris type I, II, or III fracture through the lateral malleolus or only epiphyseal fracture without fracture through the growth plate, is easily overlooked and is probably more common than earlier registered. ⋯ The supination-adduction injuries are the second most common type of ankle fractures in children (32%) only exceeded by injuries due to supination-eversion (39%). Early recognition of the fracture pattern of supination-adduction injuries is important as growth disturbance and joint problems are not uncommon when there is fracture through the medial malleolus. The need for correct diagnosis and treatment is stressed by the risk for late problems.