Archives of orthopaedic and trauma surgery
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Arch Orthop Trauma Surg · Jan 1993
Case ReportsRupture of the pectoralis major muscle in body-builders.
Rupture of the pectoralis major muscle is rarely encountered. However, among body-builders this lesion, commonly called the "pec-tear", is well known. The bench-press exercise is a common cause. In the following report the typical history, symptomatology, and treatment are discussed.
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Arch Orthop Trauma Surg · Jan 1993
Case ReportsWhich investigations are required in stress fracture of the great toe sesamoids?
For the athlete a stress fracture of the great toe sesamoid is an injury of fundamental significance. As radiographic findings and bone scintigraphy are not specific, these fractures have the longest delay between first symptoms and definitive diagnosis. Apart from magnetic resonance imaging, the only accurate investigation for early diagnosis is the longitudinal bone scan.
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Traumatic dislocation of in children occurs less frequently than in adults, and bilateral dislocation is extremely rare. Manual reduction was performed in a 3-year-old girl with bilateral traumatic hip dislocation. The recovery course has been favorable for about 1 year.
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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 1993
Case ReportsTransepiphysial fixation of anterior cruciate avulsion in a child. Report of a complication and review of the literature.
An avulsion of the anterior cruciate of an 11 year old girl was internally fixed with a transepiphysial screw. Two years later, anterior epiphysiodesis was evident, causing hyperextension of the knee. To avoid this complication, we recommend early removal of transepiphysial metalwork in children. Arthroscopical intrafocal fixation is proposed as a safe alternative.