Clinical orthopaedics and related research
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Clin. Orthop. Relat. Res. · Sep 2011
Does norepinephrine influence pain behavior mediated by dorsal root ganglia?: a pilot study.
Postganglionic neurons in the sympathetic nervous system reportedly are involved in lumbar radicular pain and release norepinephrine (NE), a neurotransmitter. Increased numbers of sympathetic nerve fibers have been found in dorsal root ganglion (DRG) neurons in a root constriction model. Whether this is a reasonable model for pain, however, is unclear ⋯ An α(2)-antagonist may be an appropriate agent for trials to treat lumbar radicular pain.
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Clin. Orthop. Relat. Res. · Sep 2011
Does reverse shoulder arthroplasty for tumors of the proximal humerus reduce impairment?
Normal function of the upper limb is seldom restored after limb-sparing surgery for tumors of the proximal humerus. The literature suggests superior shoulder function is achieved in the short term with reverse total shoulder arthroplasty compared to other techniques when performed for conditions with rotator cuff deficiency. It is unclear whether this superiority is maintained when reverse total shoulder arthroplasty is performed for tumors. ⋯ Level IV, therapeutic study. See Guidelines for Authors for a complete description of levels of evidence.
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Clin. Orthop. Relat. Res. · Sep 2011
Reverse total shoulder arthroplasty improves function in cuff tear arthropathy.
Early failure due to glenoid loosening with anatomic total shoulder arthroplasty in patients with severe rotator cuff deficiency led to the development of the reverse ball-and-socket shoulder prosthesis. The literature reports improved short-term pain and function scores following modern reverse total shoulder arthroplasty (RTSA) in patients with cuff tear arthropathy (CTA). ⋯ Level IV, therapeutic study. See Guidelines for Authors for a complete description of levels of evidence.
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Clin. Orthop. Relat. Res. · Sep 2011
A complication-based learning curve from 200 reverse shoulder arthroplasties.
Reported early complication rates in reverse total shoulder arthroplasty have widely varied from 0% to 75% in part due to a lack of standard inclusion criteria. In addition, it is unclear whether revision arthroplasty is associated with a higher rate of complications than primary arthroplasty. ⋯ Level IV, therapeutic study. See the guidelines online for a complete description of level of evidence.
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Clin. Orthop. Relat. Res. · Sep 2011
Nerve monitoring during proximal humeral fracture fixation: what have we learned?
The incidence of neurologic injury after proximal humerus fractures is variable, ranging from 6.2% to as much as 67%. However, it is unclear what factors might contribute to these injuries or whether they can be prevented by intraoperative nerve monitoring. ⋯ Level III, therapeutic study. See Guidelines for Authors for a complete description of levels of evidence.