Articles: weight-bearing.
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A retrospective study was done of 22 patients with complex femoral (11) and tibial (11) shaft fractures treated with static interlocking nailing followed by dynamization, which was carried out on average 7.8 months later. The success rate was 54% with no significant difference between the healing of femoral and tibial fractures. ⋯ The authors found that static interlocking nailing without dynamization can still produce a high union rate, and if there is sparse callus formation during the healing process, indicating low osteogenesis, dynamization will result in fracture union in only half the cases. To improve the union rate, cancellous bone grafting may be necessary.
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Randomized Controlled Trial Comparative Study Clinical Trial
Overexertional lumbar and thoracic back pain among recruits: a prospective study of risk factors and treatment regimens.
A total of 395 male infantry recruits were evaluated in a prospective study of possible risk factors for overexertional back pain and the efficacy of drug treatment regimens for this syndrome. Recruits were classified into subgroups of lumbar or thoracic, and paraspinal or spinous process pain. Recruits were divided into three treatment groups: Ibuprofen, Paracetamol, and no drug treatment. ⋯ By multivariate analysis low body mass index was found to be a risk factor for overexertional lumbar pain (p = 0.005) and increased lumbar lordosis a risk factor for overexertional thoracic pain (p = 0.005). Of recruits with overexertional back pain, 65% were asymptomatic by the end of basic training. There was no statistically significant difference between cure rates according to treatment groups.
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Arch Orthop Trauma Surg · Jan 1993
Stress transfer at the femoral bone/bone cement interface as a function of the cement thickness.
When a cement canal prosthesis is used as the femoral component in total hip replacement (THR), the penetration depth of the bone cement can be varied according to the cement implantation pressure. Using experimental data which give a relation between the pressure applied to the cement at implantation and the resulting shape of the cement layer, a three-dimensional finite element study was performed to calculate the stress distribution at the bone/bone cement interface. ⋯ From these results and from the clinical requirement that as little bone as possible be destroyed in any kind of allo-arthroplasty, we conclude that the penetration depth of bone cement into cancellous bone in THR should be minimized to the depth necessary in order to achieve sufficient initial stability of the implant. The results show that a cement-canal prosthesis meets these requirements if a cement implantation pressure of 1.0 bar is used.
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Arch Orthop Trauma Surg · Jan 1992
Physiopathology of the knee joint after distal iliotibial band transfer.
In an experimental study of 14 cadaver knee joints, the pressure load on the joint surface after distal iliotibial band transfer was measured using Fuji Prescale foils. With an intact anterior cruciate ligament, increases of up to 153% for the average pressure load and of 225% for the total pressure in the lateral compartment were found in relation to the fixation point chosen. At point P3--slightly dorsal to the insertion of the lateral collateral ligament--the area loaded with maximum pressure increased to six-fold. ⋯ After transection of the anterior cruciate ligament and iliotibial band transfer at the "over-the-top" point, a significant shift of pressure towards the medial compartment was seen, while the lateral pressure load decreased. Medially, the area loaded with peak pressure remained constant, while the corresponding area in the lateral joint space showed a highly significant decrease to nearly one-third of normal. After additional bilateral meniscectomy this tendency was even more pronounced.(ABSTRACT TRUNCATED AT 250 WORDS)
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A Thomas splint of traditional design was fitted with measuring devices and examined for its hip-relieving effect during varying activities. It was shown that there is no complete weight relief of the hip joint with this orthosis. ⋯ In regard to the hip joint, the Thomas splint is a device that reduces weight but does not entirely remove it. The results proved to be practically independent of the fitting of the orthosis and of the kind of activity.