Total Knee Arthroplasty Videofluoroscopy

Kinematics Analysis: Comparison Between the Cruciate Retaining, Fixed Bearing Primary Total Knee Arthroplasty ATTUNE TM Knee System and the Fixed Bearing PFC Sigma Curved Total Knee Arthroplasty

The primary objective is to quantify and compare the three-dimensional kinematics of the cruciate retaining (CR), fixed bearing ATTUNETM TKA to the kinematics of the PFC Sigma Curved CR Fixed Bearing TKA (both DePuy Synthes, Johnson and Johnson) during daily activities.

The secondary objective is to describe the kinematics in terms of range of motion, patterns of anterior-posterior motion of the nearest medial and lateral points ("posterior femoral rollback") and tibio-femoral internal/external rotation as well as the kinetics during daily activities, such as level gait, a deep knee bend (only ATTUNETM subjects), sitting down onto a chair, standing up from a chair and stair descent by means of video-fluoroscopy.

Furthermore, the encoded data will be handed over to DePuy Synthes (Johnson and Johnson) and to the Center for Orthopaedic Engineering of the University of Denver, where it will be used within a musculoskeletal model with the aim of simulating tibiofemoral contact mechanics and changes in the musculoskeletal system due to the TKA.

Study Overview

• Status: Completed
• Conditions: Total Knee Anthroplasty
• Intervention / Treatment: Radiation: Observational use of fluoroscopy

• Study Type: Observational
• Enrollment (Actual): 19

Contacts and Locations

Study Locations

• Switzerland
  • Zurich, Switzerland, 8093
    • Institute for Biomechanics, ETH Zürich

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: Yes
• Genders Eligible for Study: All

• Sampling Method: Non-Probability Sample

Study Population

This is a prospective, observational study on 15 subjects with the ATTUNE TM CR Fixed Bearing TKA and 15 subjects with PFC Sigma Curved CR Fixed Bearing TKA during level walking, deep knee bend (only ATTUNE TM subjects), sitting down onto a chair, standing up from a chair and stair descent. The present study extends the subject groups of a previous feasibility study (KEK-ZH-Nr. 2014-0468) from 5 to 15 ATTUNE TM and from 6 to 15 PFC Sigma Curved CR Fixed Bearing TKA subjects. Based on a power analysis of the existing data of 5 ATTUNE TM subjects and 6 subjects with a PFC Sigma Curved CR Fixed Bearing TKA in the previous feasibility study (KEK-ZH-Nr. 2014-0468) the minimal sample size for the comparative evaluation of 15 subjects within each group was estimated. The participants must be able to perform the daily activity tasks mentioned above

Description

Inclusion Criteria:

• Unilateral TKA (ATTUNETM/Sigma) due to osteoarthritis
• BMI ≤ 33
• Good clinical outcome, KOOS > 70
• No or very low pain VAS < 2
• At least one year post-op
• Standardized general health survey score (SF-12) within the normal range for people in their age group

Exclusion Criteria:

• Actual significant problem on lower extremities
• Misaligned TKA
• Any other arthroplasty at the lower extremities
• Patient incapable to understand and sign informed consent
• Incapable of performing the motion tasks
• Pregnancy

Study Plan

How is the study designed?

Number of groups / cohorts

2

Cohorts and Interventions

Group / Cohort	Intervention / Treatment
ATTUNE TM subjects	Radiation: Observational use of fluoroscopy
PFC Sigma subjects	Radiation: Observational use of fluoroscopy

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Comparison of the three-dimensional kinematics of the cruciate retaining (CR), fixed bearing ATTUNETM TKA to the kinematics of the PFC Sigma Curved CR Fixed Bearing TKA	With video-fluoroscopic assessment it is possible to directly measure the kinematics of the tibial and the femoral components in vivo during daily activities, such as level walking, a deep knee bend (only ATTUNETM subjects), sitting down onto a chair, standing up from a chair and stair descent. Thus, for the first time the present study provides in vivo assessed data of the 3D motion of the ATTUNETM System during daily activities and allows a comparison to a conventional TKA based on the same methodology. The knowledge of the in vivo kinematic behaviour of the ATTUNETM System in comparison to the conventional TKA leads to an improved understanding of the design principle.	3 hours

Collaborators and Investigators

• Sponsor: Dr. Renate List

Study record dates

Study Major Dates

• Study Start (Actual): October 1, 2016
• Primary Completion (Actual): December 1, 2018
• Study Completion (Actual): December 1, 2018

Study Registration Dates

• First Submitted: January 25, 2017
• First Submitted That Met QC Criteria: January 25, 2017
• First Posted (Estimate): January 27, 2017

Study Record Updates

• Last Update Posted (Actual): December 20, 2019
• Last Update Submitted That Met QC Criteria: December 19, 2019
• Last Verified: December 1, 2019

More Information

Terms related to this study

• Other Study ID Numbers: ATTUNE-SIGMA-2016