Comparison of Removing and Non-removing Patellofemoral Joint Osteophytes Following Medial Unicompartment Knee Arthroplasty

NCT ID: NCT05367375

Last Updated: 2022-05-10

Basic Information

• Recruitment Status: COMPLETED
• Total Enrollment: 90 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2017-01-01
• Study Completion Date: 2021-11-01

Brief Summary

Background: Anterior knee pain (AKP) is a challenge following unicompartmental knee arthroplasty (UKA). Some surgeons remove patellofemoral joint (PFJ) osteophytes to reduce osteophyte impingement and AKP. However, there is evidence that PFJ osteophytes compensate for knee osteoarthritis (OA) by increasing and improving stability and increase contract surface area in knee osteoarthritis. Moreover, when PFJ osteophytes are not removed, some studies report good clinical outcomes. The issue of removing or leaving PFJ osteophytes is controversial.

The objective of this study was to compare AKP following mobile bearing UKA after removing or leaving PFJ osteophytes.

Methods: The prospective non-randomized study included 89 isolated medial osteoarthritis (OA) of knee. They were classified into 2 groups. Group (Gp)1 was removing PFJ osteophytes; consists of 44 knees. Gp2 was non-removing PFJ osteophytes: consists of 45 knees. The patients were follow up and recorded incidence of AKP and VAS for AKP at 6 weeks, 3months, 6 months, 1 year and 2 years. No patients were lost to follow up. The patellar tilt and shift were measured at 6 weeks, 3months, 6months, 1year and 2 years via skyline view radiography. The knee society scores, Oxford knee score, knee injury and osteoarthritis outcome score, forgotten joint score and Kujala scale also were recorede at 6 weeks, 3months, 6months, 1 year and 2 years.

Detailed Description

Removing and non-removing osteophyte at patellofemoral joint is controversial topic. The osteophyte may help to reduce load and improve stability of patellofemoral joint. Therefore, the purpose of this study is to compared anterior knee pain between removing and non-removing osteophyte at patellofemoral joint following medial mobile bearing unicompartmental knee arthroplasty

Conditions

Anterior Knee Pain

Study Design

• Observational Model Type: COHORT
• Study Time Perspective: PROSPECTIVE

Study Groups

removing patellofemoral joint osteophytes

remove osteophyte at patella, medial femoral condyle and lateral femoral condyle

removing osteophyte at patellofemoral joint

Intervention Type: PROCEDURE

to compare anterior knee pain between removing patellofemoral joint osteophytes and non-removing patellofemoral joint osteophytes after medial unicompartmental knee arthroplasty

non-removing patellofemoral joint osteophytes

no remove osteophyte at patella, medial femoral condyle and lateral femoral condyle

No interventions assigned to this group

Interventions

removing osteophyte at patellofemoral joint

to compare anterior knee pain between removing patellofemoral joint osteophytes and non-removing patellofemoral joint osteophytes after medial unicompartmental knee arthroplasty

Intervention Type: PROCEDURE

Eligibility Criteria

Inclusion Criteria

• age > 42 years old
• range of motion > 90 degrees
• flexion contracture< 15 degrees
• normal function of anterior cruciate ligament

Exclusion Criteria

• spontaneous osteonecrosis of the knee
• inflammatory joinr arthritis
• full thickness cartilage loss at lateral compartment

• Minimum Eligible Age: 43 Years
• Maximum Eligible Age: 80 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Thammasat University

OTHER

Sponsor Role: lead

Responsible Party

Boonchana Pongcharoen

Associated professor

Responsibility Role: PRINCIPAL_INVESTIGATOR

Other Identifiers

MTU-EC-OT-0-224/62

Identifier Type: -

Identifier Source: org_study_id