Archives of orthopaedic and trauma surgery
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Arch Orthop Trauma Surg · Jan 2000
Comparative StudyLimb reconstruction with the callus distraction method after bone tumor resection.
The callus distraction method was applied to nine patients who were referred to us because of a bone tumor. Their mean age was 17 years and 3 months (range 7-37 years). Three were female, and 6 were male. ⋯ All of the complications were successfully treated. Functional evaluation gave excellent results in four patients, good in three, and fair in two. This method can be used without any need for massive autogenous bone graft in repairing defects of any length and diameter produced after excision of the lesion and thus can be considered as an alternative to other techniques.
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Arch Orthop Trauma Surg · Jan 2000
Case Reports Comparative StudyExperimental study of bone-implant contact with a parabolic acetabular component (Hofer-Imhof).
Incomplete bone contact with threaded acetabular components is usually attributable to the tapered thread design and sclerotic bone, and might be the reason for early loosening. The self-tapping flat threads of the Hofer-Imhof cup allow accurate insertion without incarceration, even in sclerotic bone. To demonstrate the effectiveness of this threaded cup design based on digitized measurements of bone contact area, six Hofer-Imhof cups were implanted into three human cadavers. ⋯ Factors contributing to poor contact were incomplete reaming, sections which passed through the incisura of the acetabulum, and incomplete contact with the medial aspect of the acetabulum. The aim was to achieve complete bone contact. Because of the higher contact areas observed in sclerotic bone, some sclerotic bone should remain after reaming.
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Arch Orthop Trauma Surg · Jan 2000
Case ReportsLocalization, detection and guided removal of soft tissue in the hands using sonography.
Penetrating wounds and lacerations are frequent pathologies treated in the emergency room. The management of hand trauma represents a large part of the work in any surgical practice. Although X-rays are routinely taken, numerous foreign bodies remain undetected, and the wounds are just locally debrided and the lacerations sutured. ⋯ Usually, in response to continued pain, an ultrasound investigation is ordered, and the pathology becomes apparent. A number of examples are briefly described in order to highlight the present inadequacies. It is suggested that hospital administrators consider the need to provide ultrasonographic services as an integral facility of the emergency room.
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Arch Orthop Trauma Surg · Jan 2000
Case ReportsMorphologic and morphometric study of patellar resurfacing with woven carbon filamentous pads.
Analysis of retrieved woven carbon filamentous pads, used for resurfacing of the patellar joint surface, disclosed a 4-zonal organizational pattern. Zone 1, facing the articular cavity, was devoid of carbon filaments and consisted of fibrous tissue. Foreign body granulation tissue and fibrous tissue occupied about one-third and approximately 50%-60% of the interfilamentous space in zones 2 and 3, respectively. ⋯ The bone volume within the latter was approximately 25%. Given that the purpose of articular resurfacing with implants is repopulation of the defect by chondrocytes producing a cartilaginous matrix, the woven carbon filamentous pads did not fulfill this expectation. In an environment of an ongoing foreign body-induced granulomatous reaction, the stem cells permeating the interstices of the woven carbon filamentous pad are apparently incapable of maturing into highly differentiated cells (chondrocytes) synthesizing a highly complex (cartilaginous) matrix.
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We present the outcome of a mould arthroplasty implanted for a congenital hip dysplasia in 1955 to revise a previous cup arthroplasty. This type of prosthesis, which has been developed on the basis of the concept of Smith-Peterson, by Prof. Marino-Zuco in Rome in the early 1940s, showed excellent results and was widely used until the advent of Charnley low-friction arthroplasty.