Aspects of Alignment, Function, and Migration Behaviour in Two Conceptually Different Articular Surface Designs in the Cruciate Retaining Version of the Cemented Persona Knee System - A Randomized Study Evaluated by RSA and CT Analysis
Trial Snapshot
- Phase
- Not Applicable
- Status
- Active, not recruiting
- Sponsor
- Region Skane
- Enrollment
- 60
- Locations
- 1
- Primary Endpoint
- Radiostereometry (RSA)
Study Overview
Brief Summary
The aim of this study is to evaluate, over a 2 year period, the migration pattern, function and the possibility of anatomical reconstruction of a relatively new total knee arthroplasty (TKA) concept, the Persona. Sixty patients will be randomized into 2 groups of 30 patients each, with one group receiving the Persona TKA with a conventional Cruciate Retaining (CR) polyethylene articular surface and the other group with a newly developed Medial Congruent (MC) articular surface. Patients will be followed up with Radiostereometry (RSA), conventional radiography, outcome questionnaires, clinical evaluation and Computer Tomography (CT). The migration pattern of the components will be evaluated as well as the degree of anatomical reconstruction and clinical result.
We plan also to do a 5 year follow-up of the patients with RSA and PROMS.
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel
- Primary Purpose
- Treatment
- Masking
- Single (Participant)
Eligibility Criteria
- Ages
- 50 Years to 85 Years (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- •Osteoarthritis of the knee necessitating knee replacement
- •ASA I-III
- •BMI 18 - 35
Exclusion Criteria
- •Joint sepsis in history
- •immunosuppresive drugs last 5 years
- •Rheumatoid arthritis
- •Severe osteoporosis or other metabolic bone diseases
- •Neuromuscular diseases
- •Personal disorders suspected of limiting rehab and completion of the trial period
- •Previous osteotomy of affected limb
- •Intra-articular knee fracture of affected limb
- •Peroperative fracture
- •Severe deformity of affected joint in need of augmentation or excessive release
- •Obvious need for more constrained knee than CR
Arms & Interventions
Cruciate Retaining Polyethylene (CR)
This is the standard Polyethylene articular surface
Medial Congruent Polyethylene (MC)
The intervention here will be the MC articular surface. This is the new Polyethylene articular surface with a more congruent medial side and a more flat lateral side which should better resemble natural anatomy.
Intervention: Medial Congruent Polyethylene (MC) (Device)
Outcomes
Primary Outcomes
Radiostereometry (RSA)
Time Frame: First postoperative day, 3 months, 1 year, 2 years and 5 years
Measure the change in component migration over time (translation and rotation around the x-, y- and z-axis)
Secondary Outcomes
- Computer Tomography (CT)(Preoperatively and 3 months postoperatively)
- Conventional radiography(Preoperatively and 3 months postoperatively)
- General health questionnaire(Preoperatively, 1, 2 and 5 years postoperatively)
- Knee specific health questionnaire(Preoperatively, 1, 2 and 5 years postoperatively)