Total knee replacement with interlocking stems: A preliminary report

Juan J. Rodrigo, Scott J. Hazelwood, Thomas B Farver, Jeff S. Nyman

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Revision total knee replacements or primary total knee replacements with large amounts of bone loss frequently require long-stemmed prostheses to stabilize the components. The hypothesis of the current study was that long-stemmed prostheses can be fixed with interlocking screws, provide a successful outcome, avoid extensive stress-shielding, and allow easy revision in the future. Ten patients with a minimum 2-year follow up were studied. Outcomes were studied preoperatively and postoperatively using the Short Form-12 questionnaires, physical examinations, and radiographs. Complications were recorded. Ability to do activities of daily living, strenuous work, and sedentary work were recorded on a 10-point analog scale. Results indicated that 80% of stems well-fixed as shown on serial radiographs, functional outcome scores postoperatively improved significantly from preoperatively, pain was improved significantly, and positive bone remodeling without stress-shielding was seen in 80% of patients, but 20% had significant stress-shielding in the metaphysis. Complications included two periprosthetic fractures for which the patients did not require revision surgery, and one infection. Long-stemmed total knee components with interlocking fixation seem to be a reasonable alternative when large bone defects exist in the femur or tibia.

Original languageEnglish (US)
Pages (from-to)139-146
Number of pages8
JournalClinical Orthopaedics and Related Research
Issue number392
StatePublished - 2001

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine

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