aseptic loosening imlant migration
Conditions
Interventions
Aseptic loosening
Implant migration
Inducible Displacement
Total knee prostheses
Sponsors
Leids Universitair Medisch Centrum
Eligibility
Age
18 Years to 64 Years
Inclusion criteria
Inclusion criteria: Patients will be included if • they underwent TKR for primary as well as secondary gonarthrosis as long as the indication for surgery is clearly specified • a minimal set of patient characteristics (age, gender, BMI, co-morbidity) and disease characteristics (radiological severity, knee function and alignment, status of other knee or hip joints, previous surgeries of the affected knee) is available. • they are at least *up to date* in terms of follow-up of their respective study (i.e. the most recent examination was less than a year ago and patients have a post-operative examination) • they participated for at least three years in their respective study and have a usable MTPM-value (i.e. >= 3 bone-markers can be consistently matched with the reference-examination with a CN
Exclusion criteria
Exclusion criteria: Patients will be excluded from participation if they do not meet the inclusion criteria, or if they already underwent revision surgery of their TKR since the start of the study they were enrolled in.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Inducible displacement expressed in mm (translations) and degrees (rotations) measured during the peak-force application of the different loading regimes. | — |
Secondary
| Measure | Time frame |
|---|---|
| The association of the measured induced displacement of the tibial tray relative to the bone -expressed in translations (mm) and rotations (degrees)- with the measured longitudinal migration data to identify which combination of loading regimes (i.e. force applied versus non-weight bearing examinations) yields the best discrimination between potentially loose and properly fixed implants. | — |
Countries
The Netherlands
Outcome results
None listed