Mobile-bearing Unicondylar Knee Arthroplasty
Conditions
Keywords
unicondylar knee arthroplasty, mobile-bearing, patellofemoral pain
Brief summary
Unicondylar knee arthroplasty (UKA) is a proven procedure in patients suffering from unicompartmental knee osteoarthritis. Two different types of UKA design are available - both with different pros and cons. The so-called 'mobile-bearing UKA' requires the removal of an additional amount of cartilage and bone close to the implantat. It is unclear whether this is of clinical relevance. We speculate that the amount of cartilage/bone removal is related to the clinical outcome of the UKA-surgery. In patients receiving a mobile-bearing UKA that amount of cartilage/bone removal is measured during the surgery. The clinical success of the procedure will be determined with certain knee questionnaires (Kujala & KOOS)preoperatively, 3 months postoperatively, 6 months postoperatively and 1 year postoperatively. Additionally, the so-called bone-remodelling around that area of resected cartilage and bone will be measured (SPECT-CT) postoperatively. The three variables (removed amount of cartilage/bone; clinical success with regard to the questionnaires; bone remodelling) are then analyzed with statistical methods to find out potential assoziations among them.
Interventions
PROCEDUREmobile-bearing unicondylar knee arthroplasty
mobile-bearing unicondylar knee arthroplasty
Sponsors
Medical University Innsbruck
Study design
Observational model
CASE_ONLY
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to 99 Years
Healthy volunteers
No
Inclusion criteria
\- osteoarthritis or osteonecrosis in the medial or lateral tibiofemoral compartment
Exclusion criteria
* failed upper tibial osteotomy * insufficiency of the collateral or anterior cruciate ligaments * a fixed varus or valgus deformity (not passively correctable) above 15° * a flexion deformity greater than 15° * rheumatoid arthritis
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Size of anterior femoral notch | day 0 | Required cartilage / bone removal adjacent to the femoral implant |
| Kujala Score changes | -1 days, 3 months, 6 months, 1 year | — |
| KOOS questionnaire changes | -1 days, 3 months, 6 months, 1 year | — |
| Radionuclide tracer uptake at the surgically created notch | 6 months | — |
Countries
Austria
Outcome results
None listed