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 Citations (Scopus)

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

Fingerprint

Knee Replacement Arthroplasties
Prostheses and Implants
Periprosthetic Fractures
Bone and Bones
Aptitude
Bone Remodeling
Activities of Daily Living
Tibia
Reoperation
Femur
Physical Examination
Knee
Pain
Infection

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine

Cite this

Total knee replacement with interlocking stems : A preliminary report. / Rodrigo, Juan J.; Hazelwood, Scott J.; Farver, Thomas B; Nyman, Jeff S.

In: Clinical Orthopaedics and Related Research, No. 392, 2001, p. 139-146.

Research output: Contribution to journalArticle

Rodrigo, Juan J. ; Hazelwood, Scott J. ; Farver, Thomas B ; Nyman, Jeff S. / Total knee replacement with interlocking stems : A preliminary report. In: Clinical Orthopaedics and Related Research. 2001 ; No. 392. pp. 139-146.
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