Premium
Differences in stability and bone remodeling between a customized uncemented hydroxyapatite coated and a standard cemented femoral stem A randomized study with use of radiostereometry and bone densitometry
Author(s) -
Grant Peter,
Aamodt Arild,
Falch Jan A.,
Nordsletten Lars
Publication year - 2005
Publication title -
journal of orthopaedic research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.041
H-Index - 155
eISSN - 1554-527X
pISSN - 0736-0266
DOI - 10.1016/j.orthres.2005.03.016.1100230607
Subject(s) - medicine , bone remodeling , femur , densitometry , prosthesis , stem cell , surgery , orthodontics , biology , genetics
The custom made Unique® stem is designed to fit closely to the metaphyseal region of the femur in order to obtain maximum mechanical stability and optimal load transfer. Thirty‐seven patients (38 hips) with non‐inflammatory arthritis were randomized to the uncemented custom made Unique® stem or the Elite Plus stem inserted with cement. The patients have been followed clinically as well as with radiostereometry (RSA) and Dual‐energy X‐ray Absorptiometry (DXA) for 2 years. After 2 years the RSA result showed minimal translation and rotation for the Unique® stem while the Elite Plus rotated slightly (mean 1.05°) into retroversion. Compared to previous studies the Elite Plus was as stable as the Charnley prosthesis. The DXA results showed a significantly higher proximal and total (10% for the Unique versus 5% for Elite) bone loss for the Unique® stem compared to the Elite Plus. Thus the optimal proximal press‐fit of the custom made stem did secure a stable fixation, but did not decrease the proximal bone loss. © 2005 Orthopaedic Research Society. Published by Elsevier Ltd. All rights reserved.