Risk of dislocation using large- vs. small-diameter femoral heads in total hip arthroplasty.
Repository Usage Stats
BACKGROUND: Dislocation remains a difficult problem in total hip arthroplasty. Large-diameter femoral heads may lower the incidence of dislocation by enhancing the jump distance and decreasing impingement, but their performance against small-diameter heads has not been assessed. This study compared the mid-term radiographic and functional outcomes of two matched cohorts of patients undergoing total hip arthroplasty who had a high pre-operative risk for dislocation and who received either small-diameter (26- or 28-millimeters) or large-diameter (≥36-millimeters) femoral heads. METHODS: All patients who received large-diameter heads (≥36-millimeter) between 2002 and 2005, and who had pre-operative risk factors for dislocation, were identified in the institution's joint registry. Forty-one patients (52 hips) who received large-diameter heads were identified, and these patients were matched to 48 patients (52 hips) in the registry who received small-diameter femoral heads. RESULTS: At mean final follow-up of 62 months (range, 49 to 101 months), both groups achieved excellent functional outcomes as measured by Harris Hip scores, with slightly better final scores in the large-diameter group (90 vs. 83 points). No patient showed any radiographic signs of loosening. No patient dislocated in the large-diameter femoral head group; the smaller-diameter group had a greater rate of dislocation (3.8%, 2 out of 52). CONCLUSIONS: Large-diameter femoral head articulations may reduce dislocation rates in patients who have a high pre-operative risk for dislocation while providing the same functional improvements and safety as small-diameter bearings.
Aged, 80 and over
Arthroplasty, Replacement, Hip
Published Version (Please cite this version)10.1186/1756-0500-5-553
Publication InfoAkbar, M; Issa, K; Mont, MA; Plate, JF; Seyler, Thorsten M; & Stroh, DA (2012). Risk of dislocation using large- vs. small-diameter femoral heads in total hip arthroplasty. BMC Res Notes, 5. pp. 553. 10.1186/1756-0500-5-553. Retrieved from https://hdl.handle.net/10161/10376.
This is constructed from limited available data and may be imprecise. To cite this article, please review & use the official citation provided by the journal.
More InfoShow full item record
Assistant Professor in Orthopaedic Surgery
Based on a recent market research survey, the U.S. demand for implantable medical devices is forecast to increase 7.7% annually to $52 billion in 2015. While orthopedic implants remain the largest segment, implantable devices are frequently used in urology, cardiovascular specialties, neurology, gynecology, and otolaryngology. With the increased usage of implantable devices, the number of biofilm-associated infections has emerged as a significant clinical problem because biofilms are oft