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Constraint choice in revision knee arthroplasty: study protocol of a randomised controlled trial assessing the effect of level of constraint on postoperative outcome

Constraint choice in revision knee arthroplasty: study protocol of a randomised controlled trial assessing the effect of level of constraint on postoperative outcome - Not applicable

Status
Active, not recruiting
Phases
Phase 4
Study type
Interventional
Source
DRKS
Registry ID
DRKS00010539
Enrollment
170
Registered
2016-05-30
Start date
2016-10-01
Completion date
Unknown
Last updated
2025-04-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

M17 Z96

Interventions

Group 1: Legion Revision System (Smith & Nephew Inc, Memphis, TN) Group 2: RT-Plus system (Smith & Nephew Inc, Memphis, TN)

Sponsors

KH MOL GmbH
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Inclusion criteria

Inclusion criteria: Indications are: - Rheumatoid arthritis - Post-traumatic arthritis, osteoarthritis, or degenerative arthritis in older patients whose age, weight, and activity levels are compatible with an adequate long-term result - Failed osteotomies, unicompartmental replacement, or total knee replacement In addition, the patient has to fulfil the following criteria to be eligible for the study: - The patient is scheduled for elective primary or revision knee arthroplasty - The patient is 18 years or older. There are no upper age limits for the study, as long as the patient is healthy enough to undergo surgery - The patient is willing to provide informed consent

Exclusion criteria

Exclusion criteria: - The patient participates in another concurrent study - Major psychiatric disease - Patients who do not comprehend the German language (read and speak) - Pregnancy, lactation, or childbearing potential without using adequate contraception - Acute or chronic infections, local or systemic (or corresponding previous incidents) - Severe muscle, nerve, or vascular diseases that endanger the extremity in question - Lacking bone substance or possessing inadequate bone quality that endangers a stable seating of the prosthesis - Extreme insufficiency of the knee extensor mechanism - Adipositas permagna - Local tumours - Known hypersensitivity to the material

Design outcomes

Primary

MeasureTime frame
Postoperative functional outcome as measured by the Knee Injury and Osteoarthritis Outcome Score

Secondary

MeasureTime frame
Postoperative joint awareness during various activities of daily living as measured by the Forgotten Joint Score-12, the Knee Society Score, along with the incidence and location of radiolucent lines using the Knee Society Total Knee Arthroplasty Radiographic Evaluation System.

Countries

Germany

Contacts

Public ContactHagen Hommel

KH MOL GmbH

h.hommel@khmol.de033456 40401

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 27, 2026