Clinical orthopaedics and related research
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Clin. Orthop. Relat. Res. · Feb 2014
Randomized Controlled TrialThe effect of infrapatellar fat pad excision on complications after minimally invasive TKA: a randomized controlled trial.
The infrapatellar fat pad is one of the structures that obscures exposure in minimally invasive total knee arthroplasty (MIS TKA). Most MIS TKA surgeons (and many surgeons who use other approaches as well) excise the fat pad for better exposure of the knee. There is still controversy about the result of fat pad excision on patella baja, pain, and function. ⋯ Infrapatellar fat pad excision in MIS TKA resulted in an increasing small percentage of patients with anterior knee pain after surgery. Surgeons should keep the fat pad if excellent exposure can be achieved but resect it if needed to improve exposure during TKA.
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Clin. Orthop. Relat. Res. · Feb 2014
Multicenter StudyHigh survivorship with a titanium-encased alumina ceramic bearing for total hip arthroplasty.
Although ceramic-on-ceramic bearings for total hip arthroplasty (THA) show promising results in terms of bearing-surface wear, fracture of the bearing, insertional chips, and squeaking remain a concern. ⋯ Ceramic bearings for THA with a titanium-encased insert have high survivorship at 10 years followup and a fracture risk of 0.5%. We found at last followup on routine radiographs no evidence of osteolysis, and no patient has been revised for squeaking or has reported dissatisfaction with the clinical result because of noise. IV, therapeutic study. See the Guidelines for Authors for a complete description of levels of evidence.
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Clin. Orthop. Relat. Res. · Feb 2014
Multicenter StudyMuscle strength and functional recovery during the first year after THA.
Patients undergoing total hip arthroplasty (THA) often are satisfied with the decrease in pain and improvement in function they achieve after surgery. Even so, strength and functional performance deficits persist after recovery, but these remain poorly characterized; knowledge about any ongoing strength or functional deficits may allow therapists to design rehabilitation programs to optimize recovery after THA. ⋯ Patients experience early postoperative strength losses and decreased functional capacity after THA, yet strength deficits may persist after recovery. This may suggest that rehabilitation may be most effective in the first month after surgery.
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Clin. Orthop. Relat. Res. · Feb 2014
Multicenter StudyPeriprosthetic fractures around a cementless hydroxyapatite-coated implant: a new fracture pattern is described.
Periprosthetic fractures can occur both intraoperatively and postoperatively with implantation of cementless tapered stems. ⋯ Both intraoperative and postoperative fractures can be managed with success when the stem is stabilized or found to be osseointegrated. An adjustment to the Vancouver classification is suggested to include the clamshell fracture, which has not been previously described.
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Clin. Orthop. Relat. Res. · Feb 2014
What causes unexplained pain in patients with metal-on metal hip devices? A retrieval, histologic, and imaging analysis.
Adverse tissue reactions associated with metal-on-metal (MOM) hips are common in resurfacing and total hip arthroplasty (THA) designs. The etiology of these reactions in painful, well-positioned arthroplasties is inconsistently described. ⋯ Unexplained pain in patients with well-positioned MOM hips warrants further investigation with MRI to look for features predictive of ALVAL. Tissue destruction in these cases does not appear to be related to high bearing wear or the presence of a taper.