Kinematic Analysis: Posterior Stabilized, Fixed Bearing Total Knee Arthroplasty With Attune Knee System

The University of Tennessee, Knoxville

Status: Completed

Conditions: Osteoarthritis; Total Knee Arthroplasty

Treatments: Device: DePuy Attune posterior stabilizing fixed bearing knee system

Study type: Observational

Funder types: Other; Industry

Identifiers

NCT02204748

13002

R011373503 (Other Identifier)

Details and patient eligibility

About

A better understanding of knee joint kinematics is important to explain the premature polyethylene wear failures within total knee arthroplasties (TKAs) and to help design a prosthesis that most closely approximates the normal knee. Specifically, posterior stabilizing (PS) knees have been found to be associated with lower amounts of posterior femoral rollback, higher occurrence of reverse axial rotation and increased amount of condylar lift-off. The DePuy Synthes Joint Reconstruction's Attune PS fixed bearing (FB) knee system has incorporated subtle changes in its design to address restoration of kinematics that more closely resemble those of a normal knee. To understand if this design is able to effectively restore kinematics in the implanted knee, further in vivo analysis is necessary. This pilot study will analyze 5 subjects with the Attune PS FB 3 months post-operatively using the University of Tennessee's mobile fluoroscopy unit while performing three daily activities, level walking, ramp down and deep knee bend. Since this is a pilot study, there is no hypothesis.

Enrollment: 5 patients

Sex: All

Ages: 30 to 80 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• At least three (3) months post-operative with no other surgical procedures conducted within the past six months
• Between 30-80 years of age
• Body weight of less than 280 lbs
• Must be between 160cm (5'3) and 193cm (6'4) tall
• Body Mass Index (BMI) >18.5 and <35
• Judged clinically successful with a Knee Society score (KSS) of greater than 80
• Have good-to-excellent post-operative passive flexion with no ligamentous laxity or pain
• Must be able to walk on level ground without aid of any kind, perform a ramp descent, and a deep knee bend (DKB), all without assistance
• Will have a DePuy Attune PS TKA
• Must be willing to sign the Informed Consent (IC) and HIPAA forms to participate in the study

Exclusion criteria

• Pregnant or potentially pregnant females will be excluded from the study

Trial design

5 participants in 1 patient group

DePuy Attune PS FB TKA

Description:

Individuals implanted with the DePuy Attune posterior stabilizing fixed bearing knee system implanted by a single surgeon at least three months post-operative.

Treatment:

Device: DePuy Attune posterior stabilizing fixed bearing knee system