Total Knee Arthroplasty With the Medial-Pivot Knee System

Arthroplasty Complications Clinical Trial

— MEDIAL-PIVOT  

Official title:

Total Knee Arthroplasty With the Medial-Pivot Knee System: Clinicaland Radiological Outcomes at 9.5 Years' Mean Follow-up

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT03677518
• Other study ID #: PI2017_843_0052
• Status: Completed
• Start date: January 1, 2017
• Est. completion date: October 2, 2017

Study information

• Verified date: September 2018
• Source: Centre Hospitalier Universitaire, Amiens
• Contact: n/a
• Is FDA regulated: No
• Study type: Observational

Clinical Trial 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.

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.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 71
• Est. completion date: October 2, 2017
• Est. primary completion date: October 2, 2017
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• patients > 18 years

• patienst must be operated

• patient with mid-line skin incision

Exclusion Criteria:

• patients < 18 years

Related Conditions & MeSH terms

• Arthroplasty Complications

Locations

Country	Name	City	State
n/a

Sponsors (1)

Lead Sponsor	Collaborator
Centre Hospitalier Universitaire, Amiens

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Flexion with an Advance® Medial-Pivot knee	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.	2years