Archives of orthopaedic and trauma surgery
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The value of MRI and CT in the diagnosis of soft-tissue tumors was investigated in a prospective study of 25 patients. MRI and CT give a true reflection of the tumor dimensions. ⋯ If both techniques are available, then MRI is to be preferred in view of the better spatial orientation and sharper contrast it offers between the tumor and adjacent structures. If only CT is available, then an adequate image can generally be obtained with this technique too.
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Arch Orthop Trauma Surg · Jan 1991
Orthopaedic treatment in tibial diaphyseal fractures. Risk factors affecting union.
A retrospective of 216 tibial fractures treated orthopedically was carried out. The aim was to analyze a set of clinicobiological parameters that owing to their assumed action on the physiological model of consolidation can be considered as risk factors to be taken into account in all kinds of orthopedic treatment, because they may lead to a lengthening of the normal consolidation time of the fracture. The variables analyzed were the following: type of immobilization, causative agent of the fracture, location of the focus of the fibular fracture, initial displacement, degree of conminution, type of wound, type of fracture, appearance of radiologically observable callus, commencement of weight-bearing, post-fracture hematoma, secondary displacement, and infection of soft tissues. In the particular case of immobilization by an ischiopedic plaster cast, the following parameters showed a greater degree of prognostic significance: initial displacement, secondary displacement, and age.
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Arch Orthop Trauma Surg · Jan 1991
Decalcified and undecalcified cancellous bone block implants do not heal diaphyseal defects in dogs.
In a previous study it has been shown that granulae of decalcified bone matrix do not induce bony healing of 8-week-old mid-diaphyseal defects in dogs. The aim of this study was to test whether osteoinduction combined with the osteoconductive mechanisms provided by the natural structure of cancellous bone blocks would yield better results. A 30-mm-long diaphyseal defect of the left ulna was created in eight adult mongrel dogs and the bone was stabilized with a plate. A Silastic spacer was inserted in the defect for 8 weeks, followed by implantation of frozen undecalcified or decalcified allogeneic cancellous bone blocks for 16 weeks. Healing was analyzed using morphologic methods. At 16 weeks after implantation all grafts had been resorbed. In the decalcified group one defect healed, while none in the other group did so. The implant material was bioassayed in nude rats for osteoinductivity, which was found to be low in decalcified matrix and not detectable in undecalcified bone. ⋯ Allogeneic cancellous bone blocks, demineralized or not, have no osteoinductive capacity and no osteoconductive function that promotes healing of mid-diaphyseal bone defects in dogs.
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The blood levels of the active metabolites of vitamin D3 25-hydroxycholecalciferol [25(OH)D3]. 1,25-dihydroxycholecalciferol [1,25(OH)2D3], and 24,25-dihydroxycholecalciferol [24,25(OH)2D3] were determined in 27 patients suffering from arthrosis of the knee, including 4 patients with non-insulin-dependent diabetes mellitus. The blood level of 24,25-dihydroxycholecalciferol was found to be significantly lower in patients with gonarthrosis than in patients with coxarthrosis. With the exclusion of the diabetic patients, the mean value for this metabolite was lower than in the coxarthrosis group, but the difference was not significant statistically.
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Arch Orthop Trauma Surg · Jan 1991
ReviewTen-year results of tibial osteotomy for medial gonarthrosis. The influence of overcorrection.
The results in relation to the correction achieved 1 year after surgery of a series of tibial osteotomies in 50 patients (52 knees) are presented with a total observation time of 10 years. Mean age at the time of osteotomy was 56 years. ⋯ One out of 34 overcorrected knees recurred in varus. Five knees were revised by knee arthroplasty or reosteotomy one of which was overcorrected.