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Completed

NCT Number: NCT05367375

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

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.

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Key information

Conditions

Anterior Knee Pain Joint Diseases Musculoskeletal Diseases Patellofemoral Pain Syndrome

Age range

43 year–80 year

Sex eligibility

All sexes

Study type

Observational

About this study

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

Who can participate

Healthy volunteers accepted: No

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

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

Treatment and study plan

removing osteophyte at patellofemoral joint

Procedure

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

Primary outcomes

  1. incidence of anterior knee pain

    Time frame: 6 weeks

    number of participant that had anterior knee pain

  2. incidence of anterior knee pain

    Time frame: 3 months

    number of participant that had anterior knee pain

  3. incidence of anterior knee pain

    Time frame: 6 months

    number of participant that had anterior knee pain

  4. incidence of anterior knee pain

    Time frame: 1 year

    number of participant that had anterior knee pain

  5. incidence of anterior knee pain

    Time frame: 2 year

    number of participant that had anterior knee pain

  6. Visual analogue scale for anterior knee pain

    Time frame: 6 weeks

    pain score 0= no pain and pain score 10= maximum pain

  7. Visual analogue scale for anterior knee pain

    Time frame: 3 months

    pain score 0= no pain and pain score 10= maximum pain

  8. Visual analogue scale for anterior knee pain

    Time frame: 6 months

    pain score 0= no pain and pain score 10= maximum pain

  9. Visual analogue scale for anterior knee pain

    Time frame: 1 year

    pain score 0= no pain and pain score 10= maximum pain

  10. Visual analogue scale for anterior knee pain

    Time frame: 2 years

    pain score 0= no pain and pain score 10= maximum pain

Sponsors and collaborators

Lead sponsor

Thammasat University

Other

Registry information

Official study title

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

Important dates

Study start
2017
Primary completion
2021
Study completion
2021
First posted
May 10, 2022
Registry last updated
May 10, 2022

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.

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