What question did this study set out to answer?

This study aims to determine the impact of bone mineral density on tibial implant migration in knee arthroplasties.

August 13, 2026Acta OrthopaedicaOpen Access

Tibial implant migration of cemented and cementless total and unicompartmental knee arthroplasties in patients with low and normal bone mineral density: a 5-year RSA cohort study of 397 cases

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Prospective cohort study investigates tibial implant migration in knee arthroplasties based on bone density, indicating no significant differences.

This study aims to determine the impact of bone mineral density on tibial implant migration in knee arthroplasties.
Prospective cohort study of 397 patients undergoing unicompartmental or total knee arthroplasty from 2014-2018.
Preoperative bone mineral density assessed via dual-energy X-ray absorptiometry and categorized into low or normal T-score groups.
Postoperative tibial implant migration monitored using radiostereometry at multiple follow-up intervals.
1-year mean maximum total point motion differences were minimally varied across T-score groups with values between 0.12 mm and 0.15 mm.
Continuous migration odds showed no significant differences between cemented (OR 0.94) and cementless implants (OR 0.79) per unit increase in T-score.
Findings suggest tibial implant migration does not significantly differ between patients with low and normal BMD.

A 2026 study studied this question.

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Prospective cohort study investigates tibial implant migration in knee arthroplasties based on bone density, indicating no significant differences.