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.

OriginalsprogEngelsk
TidsskriftActa Orthopaedica Scandinavica
Vol/bind66
Udgave nummer6
Sider (fra-til)513-6
Antal sider4
ISSN0001-6470
DOI
StatusUdgivet - dec. 1995
Udgivet eksterntJa

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