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

Anterior Knee Pain Clinical Trial

Official title:

Does Removing Patellofemoral Joint Osteophytes Reduce Anterior Knee Pain Following Unicompartment Knee Arthroplasty?

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT05367375
• Other study ID #: MTU-EC-OT-0-224/62
• Status: Completed
• Start date: January 1, 2017
• Est. completion date: November 1, 2021

Study information

• Verified date: May 2022
• Source: Thammasat University
• Contact: n/a
• Is FDA regulated: No
• Study type: Observational

Clinical Trial 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.

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

Recruitment information / eligibility

• Status: Completed
• Enrollment: 90
• Est. completion date: November 1, 2021
• Est. primary completion date: May 1, 2021
• Accepts healthy volunteers: No
• Gender: All
• Age group: 43 Years to 80 Years

Eligibility

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

Related Conditions & MeSH terms

• Anterior Knee Pain

Intervention

Procedure:
• 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

Locations

Country	Name	City	State
n/a

Sponsors (1)

Lead Sponsor	Collaborator
Thammasat University

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	incidence of anterior knee pain	number of participant that had anterior knee pain	6 weeks
Primary	incidence of anterior knee pain	number of participant that had anterior knee pain	3 months
Primary	incidence of anterior knee pain	number of participant that had anterior knee pain	6 months
Primary	incidence of anterior knee pain	number of participant that had anterior knee pain	1 year
Primary	incidence of anterior knee pain	number of participant that had anterior knee pain	2 year
Primary	Visual analogue scale for anterior knee pain	pain score 0= no pain and pain score 10= maximum pain	6 weeks
Primary	Visual analogue scale for anterior knee pain	pain score 0= no pain and pain score 10= maximum pain	3 months
Primary	Visual analogue scale for anterior knee pain	pain score 0= no pain and pain score 10= maximum pain	6 months
Primary	Visual analogue scale for anterior knee pain	pain score 0= no pain and pain score 10= maximum pain	1 year
Primary	Visual analogue scale for anterior knee pain	pain score 0= no pain and pain score 10= maximum pain	2 years