Motion Analysis of EMP Knee Versus Posterior Stabilized Knee Arthroplasty for Osteoarthritis

Ottawa Hospital Research Institute

Status: Completed

Conditions: Arthropathy of Knee Joint

Treatments: Procedure: Motion analysis; Procedure: Total Knee Arthroplasty

Study type: Interventional

Funder types: Other; Industry

Identifiers

NCT00967161

OHREB 2009-240-01H

Details and patient eligibility

About

The purpose of the current study is to analyze and compare the lower-limb joint motions and muscle activation patterns during activities of daily living as well as self reported health related functional outcomes for patients with osteoarthritis of the knee undergoing one of two types of knee replacements: the Evolution Medial Pivot knee (Wright Medical) or the Triathlon Posterior Stabilized (PS) knee (Stryker Orthopaedics).

Full description

Inclusion:

40 patients between the ages of 50 and 75 yrs undergoing unilateral total knee replacement for non-inflammatory degenerative osteoarthritis will participate, as well as 10 control participants will be recruited from the general population for the present study matching to experimental groups for age, gender and BMI.

Patients who do not meet any exclusion criteria.

Exclusion:

Potential participants for the control group will be asked if they have had degenerative osteoarthritis of lower-limb joints (hip, knee and ankle) and if they have they will be excluded.

Exclusion for patient group

1. Patients suffering from any other lower-limb joint disorders other than the one for which total knee arthroplasty.
2. Patients with any other joint replacement in the ipsilateral and contralateral limb.
3. Patients with evidence of active infection.
4. Patients with neurologic or musculoskeletal disease that may adversely affect gait, weight-bearing or quadriceps function.
5. Patients with neuropathic joints.
6. Patients requiring structural bone grafts.
7. Patients with a documented allergy to cobalt chromium molybdenum.
8. Patient with a BMI larger than 30 kg/m2.

Enrollment: 50 patients

Sex: All

Ages: 50 to 75 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• 40 patients between the ages of 50 and 75 yrs undergoing unilateral total knee replacement for non-inflammatory degenerative osteoarthritis will participate, as well as 10 control participants will be recruited from the general population for the present study matching to experimental groups for age, gender and BMI.Patients who do not meet any exclusion criteria.

Exclusion criteria

• Potential participants for the control group will be asked if they have had degenerative osteoarthritis of lower-limb joints (hip, knee and ankle) and if they have they will be excluded.

Exclusion for patient group

1. Patients suffering from any other lower-limb joint disorders other than the one for which total knee arthroplasty.
2. Patients with any other joint replacement in the ipsilateral and contralateral limb.
3. Patients with evidence of active infection.
4. Patients with neurologic or musculoskeletal disease that may adversely affect gait, weight-bearing or quadriceps function.
5. Patients with neuropathic joints.
6. Patients requiring structural bone grafts.
7. Patients with a documented allergy to cobalt chromium molybdenum.
8. Patient with a BMI larger than 30 kg/m2.

Trial design

50 participants in 2 patient groups

Evolution Medial Pivot Knee

Experimental group

Description:

20 Patients will receive the EMP Knee Implant

Treatment:

Procedure: Total Knee Arthroplasty

Procedure: Motion analysis

Triathlon PS Knee

Active Comparator group

Description:

20 Patients will receive the Triathlon PS Knee

Treatment:

Procedure: Total Knee Arthroplasty

Procedure: Motion analysis