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Related Experiment Video

Updated: Feb 13, 2026

Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach

Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach

Published on: January 24, 2018

RSA migration of total knee replacements.

Bart G Pijls¹, José W M Plevier², Rob G H H Nelissen¹

¹a Department of Orthopaedics , Leiden University Medical Center , Leiden.

Acta Orthopaedica

|March 7, 2018

Summary

Early migration of total knee replacement (TKR) tibial components largely occurs within six months, followed by stability. This finding, from a systematic review of radiography stereometry analysis (RSA) studies, links early TKR migration to later revision risks.

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Area of Science:

Orthopedic surgery
Biomedical engineering
Radiographic analysis

Background:

Tibial component migration is a critical factor in total knee replacement (TKR) longevity.
Understanding migration patterns is essential for predicting implant survival and revision rates.

Purpose of the Study:

To systematically review and meta-analyze early and long-term tibial component migration patterns in TKR using radiography stereometry analysis (RSA) data.
To establish benchmarks for TKR migration and identify thresholds for future evaluations.

Main Methods:

Systematic review and meta-analysis of published radiography stereometry analysis (RSA) studies on TKR.
Inclusion of studies with at least two postoperative RSA follow-up moments.
Analysis of maximal total point motion (MTPM) at various time points (6 weeks to 10 years).

Main Results:

The majority of early migration occurred within the first six months postoperatively, followed by a stable period.
Cemented tibial components showed consistent migration patterns regardless of bearing type or fixation.
Uncemented tibial components exhibited varied migration, with uncoated components showing the highest migration.

Conclusions:

The observed TKR migration patterns align with joint registry survival analyses and meta-analyses of revision rates.
Early tibial component migration is strongly associated with late revision due to loosening.
Pooled migration data can serve as benchmarks for evaluating new TKR designs and performance.