The Journal of bone and joint surgery. American volume
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J Bone Joint Surg Am · Jan 2003
Clinical TrialIsolated revision of the patellar component in total knee arthroplasty.
Problems with the patellofemoral articulation are the most common causes of failure after total knee arthroplasty. However, there are few reports describing outcomes following isolated revision of the patellar component. ⋯ Therapeutic study, Level IV (case series [no, or historical, control group]). See p. 2 for complete description of levels of evidence.
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J Bone Joint Surg Am · Jan 2003
Sustained spinal cord compression: part I: time-dependent effect on long-term pathophysiology.
The objective of this study is to determine whether there is a relationship between the duration of sustained spinal cord compression and the extent of spinal cord injury and the capacity for functional recovery after decompression. ⋯ The relatively rapid viscoelastic relaxation of the spinal cord during the early phase of sustained cord compression suggests that there are mechanisms of secondary injury that are linked to tissue displacement. Longer periods of displacement allow propagation of the secondary injury process, resulting in a lack of recovery of somatosensory evoked potentials, limited functional recovery, and more extensive tissue damage.
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J Bone Joint Surg Am · Jan 2003
Comparative StudyCentral placement of the screw in simulated fractures of the scaphoid waist: a biomechanical study.
Recent reports on internal fixation of acute fractures of the scaphoid waist have demonstrated higher rates of central placement of the screw when cannulated screws were used than when noncannulated screws were used. This cadaveric study was designed to determine whether central placement in the proximal fragment of the scaphoid offers a biomechanical advantage. ⋯ Central placement of the screw in the proximal fragment of the scaphoid offers a biomechanical advantage in the internal fixation of an osteotomy of the scaphoid waist. Clinical efforts and techniques that facilitate central placement of the screw in the fixation of fractures of the scaphoid waist should be encouraged.
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J Bone Joint Surg Am · Jan 2003
Open reduction and internal fixation of delayed unions and nonunions of fractures of the distal part of the humerus.
The purpose of the present retrospective study was to evaluate the results of open reduction and internal fixation of delayed unions and nonunions of fractures of the distal part of the humerus. ⋯ Therapeutic study, Level IV (case series [no, or historical, control group]). See p. 2 for complete description of levels of evidence.