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Completed

NCT Number: NCT03650426

Comparison Between the Onlay and Inlay Techniques for Patellar Resurfacing in Posterior Cruciate Ligament-Substituting Total Knee Arthroplasty

The purpose of this study is to compare clinical outcome in posterior cruciate ligament-substituting total knee arthroplasty with onlay patellar resurfacing technique and inlay patellar resurfacing technique

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Key information

Conditions

Onlay Patellar Resurfacing Technique Inlay Patellar Resurfacing Technique Patellar Resurfacing

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Navamindradhiraj University

Dusit, Bangkok, 10300, Thailand

Who can participate

Healthy volunteers accepted: No

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

Inclusion criteria

  • Primary osteoarthritis of knee who were scheduled for a primary total knee arthroplasty

Exclusion criteria

  • Valgus deformity
  • History of inflammatory arthroplathy
  • Previous fracture or open surgery on the same knee
  • History of patellar instability

Treatment and study plan

Total knee with onlay patellar resurfacing technique

Procedure

The patellar resurfacing technique that the patellar implant is embedded on the patellar bone.The patellar implant is placed on top of a flat tibial osteotomy or cut-surfaced bone

Total knee with inlay patellar resurfacing technique

Procedure

The patellar resurfacing technique that the patellar implant is embedded in the patellar bone.The patellar implant is surrounded by a rim of cortical bone and supported by hardened, sclerotic bone

Primary outcomes

  1. Change of post-operative anterior knee pain

    Time frame: Change from baseline Visual Analog Scale for anterior knee pain at 3 months, 6 months, and 12 months after surgery

    Visual Analog Scale for anterior knee pain (minimum 0, maximum 10) Do higher values represent a worse outcome

  2. range of motion of knee

    Time frame: Change from baseline Knee Society and Knee Society function score at 3 months, 6 months, and 12 months after surgery

    Knee Society and Knee Society function score (minimum 0, maximum 200)

  3. Knee Society and Knee Society function score

    Time frame: Change from baseline Knee Society and Knee Society function score at 3 months, 6 months, and 12 months after surgery

    Knee Society and Knee Society function score (minimum 0, maximum 200)

  4. New patellar score

    Time frame: Change from baseline new patellar score at 3 months, 6 months, and 12 months after surgery

    New patellar score (minimum 0, maximum 30)

  5. Oxford knee score

    Time frame: Change from baseline Oxford knee score 3 months, 6 months, and 12 months after surgery

    Oxford knee score (minimum 0, maximum 48)

  6. Prevalence of anterior knee pain ,AKP

    Time frame: Change from baseline Prevalence of anterior knee pain ,AKP 3 months, 6 months, and 12 months after surgery

    Prevalence of anterior knee pain ,AKP (minimum 0, maximum 10)

  7. Prevalence of patellar crepitus complication

    Time frame: Change from baseline patellar crepitus complication 3 months, 6 months, and 12 months after surgery

    Prevalence of patellar crepitus complication (present, absent)

Sponsors and collaborators

Lead sponsor

Navamindradhiraj University

Other

Registry information

Official study title

Comparison Between the Onlay and Inlay Techniques for Patellar Resurfacing in Posterior Cruciate Ligament-Substituting Total Knee Arthroplasty: A Prospective, Randomized Controlled Trial

Important dates

Study start
2018
Primary completion
2020
Study completion
2020
First posted
Aug 28, 2018
Registry last updated
Apr 20, 2021

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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