The Journal of arthroplasty
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Randomized Controlled Trial
Heterotopic ossification after surface replacement arthroplasty and total hip arthroplasty: a randomized study.
With a randomized clinical trial, we compared the incidence and severity of heterotopic ossification in cohorts of patients who have undergone either surface replacement arthroplasty or total hip arthroplasty at a minimum follow-up of 1 year. Surface replacement arthroplasty group had a significantly higher rate of severe heterotopic ossification (Brooker grades 3-4) than the total hip arthroplasty group, 12.6% (13/103) vs 2.1% (2/97) respectively (P = .02). ⋯ Patients with severe heterotopic ossification had significantly inferior functional outcome scores. Surgeons offering surface replacement must be aware of this risk and use meticulous surgical technique and consider routine prophylaxis against heterotopic ossification.
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Randomized Controlled Trial
Continuous femoral nerve block in total knee arthroplasty: immediate and two-year outcomes.
We conducted a prospective study to investigate the immediate and 2-year outcomes of total knee arthroplasty patients who received continuous femoral nerve block (FNB) for analgesia. Sixty patients undergoing unilateral total knee arthroplasty were randomized into 3 groups and received high-dose continuous FNB, low-dose continuous FNB, or no FNB. ⋯ Immediately after surgery, there was less pain, higher satisfaction, and lower morphine use among patients on continuous FNB regardless of ropivacaine dosage used. At 2 years, there were no significant differences in functional outcomes.