Changes in bone mineral density of the proximal tibia after uncemented total knee arthroplasty. A 3-year follow-up of 25 knees

M M Petersen, P T Nielsen, J B Lauritzen, B Lund

Abstract

We measured bone remodeling of the proximal tibia prospectively for 3 years after uncemented total knee arthroplasty (TKA) in 25 knees with primary arthrosis. In the trabecular bone below the tibial component, bone mineral density (BMD) was measured in 6 different regions of interest (ROI), using dual photon absorptiometry (DPA). In the tibial condyles, where the change in knee alignment indicated that the load was reduced postoperatively, a fast bone loss of 7-20% was seen during the first 6 months after surgery. A small, but significant increase in BMD of 2-7% was seen in the tibial condyles, where the load was increased. On average, the density for all ROI below the tibial component showed a significant and progressive decrease in BMD, reaching 22% at 3 years follow-up.

Original languageEnglish
JournalActa Orthopaedica Scandinavica
Volume66
Issue number6
Pages (from-to)513-6
Number of pages4
ISSN0001-6470
DOIs
Publication statusPublished - Dec 1995
Externally publishedYes

Keywords

  • Absorptiometry, Photon
  • Aged
  • Aged, 80 and over
  • Bone Density
  • Bone Remodeling
  • Female
  • Follow-Up Studies
  • Humans
  • Knee Prosthesis
  • Male
  • Middle Aged
  • Postoperative Period
  • Tibia/physiopathology

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