Total Knee Arthroplasty With the Medial-Pivot Knee System: Clinicaland Radiological Outcomes at 9.5 Years' Mean Follow-up
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Enrollment
- 71
- Locations
- 1
- Primary Endpoint
- Flexion with an Advance® Medial-Pivot knee
Study Overview
Brief Summary
The "ball-in-socket" design of the Medial-Pivot knee system (MicroPort Orthopedics, Arling-ton, Tennessee, USA) aims to reproduce normal knee kinematics by medializing its rotational axis. Thegoal of this study was to measure knee range of motion (ROM) with this implant after a mean follow-up of 10 years and to report the survivorship and long-term clinical and radiological outcomes. Wehypothesized the prosthetic knee would have at least 120◦flexion at 10 years. This was retrospective, single-centre study of 74 Medial-Pivot knees implanted in71 patients (average age of 69 years) between May 2005 and November 2007. All patients who receiveda Medial-Pivot knee were included consecutively. The mean follow-up was 10 years. Clinical and radio-logical assessments were performed using the Knee Society Score (KSS) and Ewald's score. Kaplan-Meirsurvival analysis was used to calculate survivorship.
Detailed Description
methodsThis was retrospective, single-centre study of 74 Medial-Pivotknees implanted in 71 patients between May 2005 and Novem-ber 2007. During this period, several types of semi-constrainedprimary TKA implants were used.The "ball-in-socket" design of the Medial-Pivot knee system (MicroPort Orthopedics, Arling-ton, Tennessee, USA) aims to reproduce normal knee kinematics by medializing its rotational axis. Thegoal of this study was to measure knee range of motion (ROM) with this implant after a mean follow-up of 10 years and to report the survivorship and long-term clinical and radiological outcomes. Wehypothesized the prosthetic knee would have at least 120◦flexion at 10 years. This was retrospective, single-centre study of 74 Medial-Pivot knees implanted in71 patients (average age of 69 years) between May 2005 and November 2007. All patients who receiveda Medial-Pivot knee were included consecutively. The mean follow-up was 10 years. Clinical and radio-logical assessments were performed using the Knee Society Score (KSS) and Ewald's score. Kaplan-Meirsurvival analysis was used to calculate survivorship.
Study Design
- Study Type
- Observational
- Observational Model
- Case Only
- Time Perspective
- Retrospective
Eligibility Criteria
- Ages
- 18 Years to — (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- •patients > 18 years
- •patienst must be operated
- •patient with mid-line skin incision
Exclusion Criteria
- •patients < 18 years
Outcomes
Primary Outcomes
Flexion with an Advance® Medial-Pivot knee
Time Frame: 2years
The objective of this study was to evaluate the flexion in patients with an Advance® Medial-Pivot knee after an average follow-upof 10 years. Knee flexion was measured with a goniometer in the office; thegreater trochanter, knee centre and lateral malleolus were used asreference points.
Secondary Outcomes
No secondary outcomes reported