Kinematic Analysis: Posterior Stabilized, Fixed Bearing Total Knee Arthroplasty With Attune Knee System - Phase 2
| Status: | Recruiting |
|---|---|
| Conditions: | Arthritis, Osteoarthritis (OA), Orthopedic |
| Therapuetic Areas: | Rheumatology, Orthopedics / Podiatry |
| Healthy: | No |
| Age Range: | 30 - 80 |
| Updated: | 1/13/2017 |
| Start Date: | November 2015 |
| End Date: | December 2017 |
| Contact: | Adrija Sharma, Ph. D. |
| Email: | asharma1@utk.edu |
| Phone: | 8659742093 |
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 continuation of the study will analyze 30 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.
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 continuation of the study will analyze 30 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.
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
Exclusion Criteria:
- Pregnant or potentially pregnant females will be excluded from the study.
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Charlotte, North Carolina 28207
Principal Investigator: Thomas Fehring, MD
Phone: 704-323-2263
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