Despite good results of primary total knee arthroplasties (TKAs), the number of revision TKA (rTKA) is rising. Main reason for revision is aseptic loosening, accounting for 30-42% of all knee revisions. Other reasons for rTKA may be infection, pain, instability, wear, fracture, malalignment, implant breakage, incorrect size and dislocation of one or more components. The goal of primary and revision TKA is the same: restore function and stability of the knee joint and relieve pain, but rTKA is a
Conditions
Interventions
In the intervention group, CAS will be admitted to rTKA to determine the position of the revision prosthesis. We will use the ORTHOsoft Navitrack® navigation system from Zimmer. The navigation is base
Sponsors
University Medical Center Groningen
Eligibility
Inclusion criteria
Inclusion criteria: Inclusion criteria for the intervention group are: 1. The use of CAS during rTKA; 2. A minimum age of 18 years; 3. Only total revisions, re-implantations and partial revisions of either the tibial or femoral part are included. For partial revisions, only measurements of the part of the prosthesis which will be revised will be used. Inclusion criteria for the historical control group are: 1. rTKA without the use of CAS; 2. A minimum age of 18 years; 3. Only total revisions, re-implantations and partial revisions of either the tibial or femoral part are included. For partial revisions, only measurements of the part of the prosthesis which is revised will be used; 4. Patients will only be included if a type of prosthesis was implanted which is still used nowadays.
Exclusion criteria
Exclusion criteria: Exclusion criteria for both groups are: 1. Partial revisions without total revision of the tibial or femoral part; 2. Patients who received or will receive a tumor prosthesis; 3. Patients with a limited knowledge of the Dutch language or who are mentally incapable for participation.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Rotational alignment. | — |
Secondary
| Measure | Time frame |
|---|---|
| Alignment in coronal and sagittal plane. | — |
Contacts
Public ContactMarrigje F. Meijer
Department of Orthopaedics University of Groningen, University Medical Center Groningen P.O. Box 30.001
Outcome results
None listed