A cemented mobile-bearing total knee prosthesis prevents peri-prosthetic bone mineral density loss around the femoral component: a consecutive follow-up at a mean of 11 years.
Bone mineral density
Fixed-bearing total knee prosthesis
Mobile-bearing total knee prosthesis
Posterior stabilized total knee prosthesis
Total knee arthroplasty
Journal
Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA
ISSN: 1433-7347
Titre abrégé: Knee Surg Sports Traumatol Arthrosc
Pays: Germany
ID NLM: 9314730
Informations de publication
Date de publication:
Feb 2022
Feb 2022
Historique:
received:
26
09
2020
accepted:
11
01
2021
pubmed:
26
1
2021
medline:
26
2
2022
entrez:
25
1
2021
Statut:
ppublish
Résumé
Research has shown that a cemented mobile-bearing component has a favorable effect on the bone mineral density (BMD) of the distal femur at 2 years after total knee arthroplasty (TKA). This study was performed to determine whether the advantage on BMD of a cemented mobile-bearing TKA over a conventional cemented fixed-bearing TKA changes with time. This report is an update of a matched cohort study initiated in 2004 and for which the 2-year results have been published. Twenty-eight knees that were treated with a fixed-bearing posterior stabilized (PS) prosthesis and 28 matched knees from a database of 76 knees that were treated with a mobile-bearing PS prosthesis in the same period were investigated. All knees underwent dual-energy X-ray absorptiometry (DEXA) scans around the femoral component preoperatively, 2 weeks postoperatively, 5 years postoperatively, and annually thereafter. Eighteen knees with a cemented mobile-bearing PS prosthesis and 20 knees with a cemented fixed-bearing PS prosthesis were investigated for more than 6 years. The mean follow-up period was 11 years. The range of motion, Knee Society Score, BMD of the lumbar spine, and follow-up period were not significantly different preoperatively and postoperatively in the two groups. In the fixed-bearing group, the BMD of the anterior part of the femoral condyle decreased postoperatively. In the mobile-bearing group, the BMD of the posterior part of the femoral condyle increased postoperatively. The postoperative change in the BMD at 5 years and the latest follow-up period was statistically significant in the two groups. This DEXA study revealed that a cemented mobile-bearing component had a favorable effect on the BMD of the distal femur after TKA even at a mean of 11 years postoperatively. Therapeutic study, level II, prospective comparative study.
Identifiants
pubmed: 33492409
doi: 10.1007/s00167-021-06448-4
pii: 10.1007/s00167-021-06448-4
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
734-739Informations de copyright
© 2021. European Society of Sports Traumatology, Knee Surgery, Arthroscopy (ESSKA).
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