Patellofemoral Pain After Unicondylar Knee Arthroplasty

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.

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Key information

Conditions

Mobile-bearing Unicondylar Knee Arthroplasty Joint Diseases Musculoskeletal Diseases Patellofemoral Pain Syndrome

Age range

18 year–99 year

Sex eligibility

All sexes

Study type

Observational

Primary location

Innsbruck Medical University

Innsbruck, 6020, Austria

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

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

Treatment and study plan

mobile-bearing unicondylar knee arthroplasty

Procedure

mobile-bearing unicondylar knee arthroplasty

Primary outcomes

Size of anterior femoral notch

Time frame: day 0

Required cartilage / bone removal adjacent to the femoral implant
Kujala Score changes

Time frame: -1 days, 3 months, 6 months, 1 year
KOOS questionnaire changes

Time frame: -1 days, 3 months, 6 months, 1 year
Radionuclide tracer uptake at the surgically created notch

Time frame: 6 months

Sponsors and collaborators

Lead sponsor

Medical University Innsbruck

Other

Registry information

Important dates

Study start: 2011
Primary completion: 2014
First posted: Aug 1, 2011
Registry last updated: Jul 19, 2016

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Published trials that share one or more normalized conditions with this study.

Completed