ATTUNE TM Video-fluoroscopy Study

Kinematics Analysis: Cruciate Retaining, Fixed Bearing Primary Total Knee Arthroplasty With the ATTUNE TM Knee System

The proposed study is a retrospective, observational study. A group of 5 subjects with the AttuneTM cruciate retaining (CR) fixed bearing total knee arthroplasty (TKA) are analysed during level walking, a deep knee bend, sitting down onto a chair, standing up from a chair and stair descent at least 12 months post-operatively, in terms of 3D fluoroscopic assessed tibio-femoral TKA motion as well as simultaneous skin marker assessed whole leg motion and ground reaction forces. The obtained information helps the manufacturer (DePuy) to evaluate, bring to market and advance the implant. Furthermore the information will be integrated in a model, which will be developed at the Center for Orthopaedic Engineering, University of Denver. By means of this model, different conditions such as the use of an advanced prosthesis design can be simulated and tested.

The objective of this study is in a first step to demonstrate the capability of data collection and analysis of level gait, deep knee bend, sitting down onto a chair, standing up from a chair and stair descent on a limited sample size of five subjects. Secondly to quantify and describe the three-dimensional kinematics for the cruciate retaining (CR), fixed bearing AttuneTM TKA during daily activities such as those mentioned.

Study Overview

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

• Study Type: Observational
• Enrollment (Actual): 5

Contacts and Locations

Study Locations

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

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

Prof. Dr. med. Carsten Perka will do the recruitment, since he is the surgeon that worked the most with this implant and therefore also has the biggest population of possibly eligible patients. Furthermore the patients already know and trust him, which could lead to a greater success in the recruitment as well. For these reasons the financial source DePuy Synthes, Johnson and Johnson, requires that the clinical collaborator Prof. Dr. med. Carsten Perka will do the recruitment. He works in the Charité in Berlin, Germany, where he does the recruitment.

Description

Inclusion Criteria:

• Unilateral TKA (ATTUNETM) due to osteoarthrosis (OA)
• Body mass index (BMI) ≤ 33
• Good clinical outcome, Knee injury and Osteoarthritis Outcome Score (KOOS) > 70
• No or very low Visual Analog Scale for 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?

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Relationship between the knee flexion angle and the medial and lateral anterior-posterior translation of the condyles	The primary outcome of this pilot study is the relationship between the knee flexion angle and the medial and lateral anterior-posterior translation of the condyles during level walking, stair descent, standing up from a chair, sitting onto a chair and deep knee bend.	3 hours

Collaborators and Investigators

• Sponsor: Dr. Renate List
• Investigators: Principal Investigator: Renate List, PhD, ETH Zurich

Study record dates

Study Major Dates

• Study Start: July 1, 2015
• Primary Completion (Actual): March 1, 2016
• Study Completion (Actual): September 1, 2016

Study Registration Dates

• First Submitted: February 4, 2015
• First Submitted That Met QC Criteria: February 6, 2015
• First Posted (Estimate): February 9, 2015

Study Record Updates

• Last Update Posted (Estimate): January 26, 2017
• Last Update Submitted That Met QC Criteria: January 25, 2017
• Last Verified: January 1, 2017

More Information

Terms related to this study

• Keywords: Implant
• Other Study ID Numbers: ATTUNE-2015