Osteoarthritis, Patellofemoral Joint
Conditions
Brief summary
There is currently no sufficient evidence if there is superiority of one of the two available types (onlay type, inlay type) of patellofemoral arthroplasty. Therefore, it is the aim of this study to compare the two types in a prospective comparative setting. Patients on the waiting list for patellofemoral arthroplasty are randomized to either onlay or inlay type patellofemoral arthroplasty. The KOOS - knee score serves as the primary outcome parameter. Secondary outcome parameters are the Marx Activity Scale, the HSS patella score, the Kujala Score, radiographic loosening, progression of tibiofemoral degeneration, revision surgery and parameters of patellofemoral tracking. Inferential statistics will be performed at 1-year follow up data-sets.
Interventions
Sponsors
Medical University Innsbruck
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
18 Years to 120 Years
Healthy volunteers
No
Inclusion criteria
* patellofemoral osteoarthritis, waiting list for patellofemoral arthroplasty
Exclusion criteria
* systemic inflammatory arthropathy * tibiofemoral joint degeneration IKDC grade C or worse * severe degeneration of also the trochlea margins (inlay PFA not adequate) * patellectomy * previous implantation of tibiofemoral metal implants * extension loss \>5 degree * knee flexion of less than 100° * planned concomitant tibiofemoral procedures (eg. coronal plane osteotomies, tibiofemoral cartilage procedures, tibiofemoral ligament procedures)
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| KOOS knee score | 1 year |
Secondary
| Measure | Time frame |
|---|---|
| Kujala Score | 1 year |
| Marx Activity Scale | 1 year |
| HSS patella Score | 1 year |
Other
| Measure | Time frame | Description |
|---|---|---|
| revision of prosthesis | 20 years | reoperations with ex/implantation of implants are defined as prosthetic revision |
| progression of tibiofemoral osteoarthritis | 20 years | progression of tibiofemoral osteoarthritis is assessed in terms of IKDC grades A-D |
| radiolucent lines adjacent to the prosthesis | 20 years | radiolucent lines adjacent to the prosthesis indicate prosthesis loosening |
Countries
Austria
Contacts
Primary Contactmichael C Liebensteiner
Outcome results
None listed