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Risk of dislocation using large- vs. small-diameter femoral heads in total hip arthroplasty

Publication ,  Journal Article
Plate, JF; Seyler, TM; Stroh, DA; Issa, K; Akbar, M; Mont, MA
Published in: BMC Research Notes
October 5, 2012

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.

Duke Scholars

Published In

BMC Research Notes

DOI

EISSN

1756-0500

ISSN

1756-0500

Publication Date

October 5, 2012

Related Subject Headings

  • Bioinformatics
  • 32 Biomedical and clinical sciences
  • 1199 Other Medical and Health Sciences
  • 0601 Biochemistry and Cell Biology
 

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Plate, J. F., Seyler, T. M., Stroh, D. A., Issa, K., Akbar, M., & Mont, M. A. (2012). Risk of dislocation using large- vs. small-diameter femoral heads in total hip arthroplasty (Accepted). BMC Research Notes. https://doi.org/10.1186/1756-0500-5-2101791285670499
Plate, J. F., T. M. Seyler, D. A. Stroh, K. Issa, M. Akbar, and M. A. Mont. “Risk of dislocation using large- vs. small-diameter femoral heads in total hip arthroplasty (Accepted).” BMC Research Notes, October 5, 2012. https://doi.org/10.1186/1756-0500-5-2101791285670499.
Plate JF, Seyler TM, Stroh DA, Issa K, Akbar M, Mont MA. Risk of dislocation using large- vs. small-diameter femoral heads in total hip arthroplasty (Accepted). BMC Research Notes. 2012 Oct 5;
Plate, J. F., et al. “Risk of dislocation using large- vs. small-diameter femoral heads in total hip arthroplasty (Accepted).” BMC Research Notes, Oct. 2012. Scopus, doi:10.1186/1756-0500-5-2101791285670499.
Plate JF, Seyler TM, Stroh DA, Issa K, Akbar M, Mont MA. Risk of dislocation using large- vs. small-diameter femoral heads in total hip arthroplasty (Accepted). BMC Research Notes. 2012 Oct 5;
Journal cover image

Published In

BMC Research Notes

DOI

EISSN

1756-0500

ISSN

1756-0500

Publication Date

October 5, 2012

Related Subject Headings

  • Bioinformatics
  • 32 Biomedical and clinical sciences
  • 1199 Other Medical and Health Sciences
  • 0601 Biochemistry and Cell Biology