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Enrolling by Invitation

NCT Number: NCT07555067

Comparison Between Velys J&J Robotic-assisted and Cori S&N Robotic-assisted Total Knee Arthroplasty

This randomised controlled trial will include patients with end-stage osteoarthritis of the knee undergoing primary TKR. Patients meeting the criteria that consent to be in the study will be randomised at a ratio of 1:1 to either Velys J&J robotic-assisted or Cori S&N robotic-assisted TKR. The primary objective will assess pre- and postoperative HKA angle, CPAK and range of motion using goniometer to compare two groups.The secondary objectives are to compare patient expectation, functional ability, quality of life using functional 48-point Oxford Knee Score and Forgotten joint score.

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Key information

Conditions

Knee Arthritis Osteoarthritis

Age range

18 year and older

Sex eligibility

All sexes

Study type

Observational

Primary location

Dr. Jan Biziel University Hospital No. 2 in Bydgoszcz

Bydgoszcz, Kuyavian-Pomeranian Voivodeship, 85-168, Poland

About this study

This randomised controlled trial will include patients with end-stage osteoarthritis of the knee undergoing primary TKR. Patients meeting the criteria that consent to be in the study will be randomised at a ratio of 1:1 to either Velys J&J robotic-assisted or Cori S&N robotic-assisted TKR. The primary objective will assess pre- and postoperative HKA angle, CPAK and range of motion using goniometer to compare two groups.The secondary objectives are to compare patient expectation, functional ability, quality of life using functional 48-point Oxford Knee Score and Forgotten joint score.

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

gonarthrosis

Exclusion criteria

heavy systemic diseases

Treatment and study plan

preoperative HKA

Other

assess preoperative HKA

preoperative CPAK

Other

asses preoperative CPAK

preoperative Oxford Knee Score

Other

assess preoperative Oxford Knee Score

preoperative Forgotten Joint Score

Other

assess preoperative Forgotten Joint Score

preoperative range-of-motion

Other

assess preoperative range-of-motion

postoperative HKA

Other

postoperative HKA

postoperative CPAK

Other

postoperative CPAK

postoperative range-of-motion

Other

postoperative range-of-motion

postoperative Oxford Knee Score

Other

postoperative Oxford Knee Score

postoperative Forgotten Joint Score

Other

postoperative Forgotten Joint Score

Primary outcomes

  1. 1. HKA angle

    Time frame: before and 3,6,12 after surgery

  2. CPAK

    Time frame: before and 3,6,12 months after surgery

  3. range-of-motion

    Time frame: before and 3,6,12 moths after surgery

Secondary outcomes

  1. Oxford Knee Score

    Time frame: before and 3,6,12 months after surgery

  2. Forgotten Joint Score

    Time frame: before and 3,6,12 moths after surgery

Sponsors and collaborators

Lead sponsor

Jan Biziel University Hospital No 2 in Bydgoszcz

Other

Collaborators

  • Charles University, Czech Republic
  • Vascular surgery, University hospital Královské Vinohrady, Prague

Registry information

Acronym: TKA

Important dates

Study start
2026
Primary completion
2026
Study completion
2027
First posted
Apr 28, 2026
Registry last updated
Jun 24, 2026

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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