Patellofemoral Pain After Unicondylar Knee Arthroplasty

Completed

• Conditions: Mobile-bearing Unicondylar Knee Arthroplasty
• Interventions: Procedure: mobile-bearing unicondylar knee arthroplasty

• Registration Number: NCT01407042
• Lead Sponsor: Medical University Innsbruck

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.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2011-07-26
• Study First Submitted QC: 2011-07-29
• Study First Posted: 2011-08-01
• Study Start: 2011-09
• Primary Completion: 2014-12
• Status Verified: 2016-07
• Last Update Submitted: 2016-07-16
• Last Update Posted: 2016-07-19

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 24

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

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
mb-UKA	mobile-bearing unicondylar knee arthroplasty	Patients with unicondylar osteoarthritis of the knee

Primary Outcome Measures

Name	Time	Method
KOOS questionnaire changes	-1 days, 3 months, 6 months, 1 year
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
Radionuclide tracer uptake at the surgically created notch	6 months

Trial Locations

Locations (1)

Innsbruck Medical University; 🇦🇹 Innsbruck, Austria