Osteoarthritis Clinical Trial
Official title:
Antero-Posterior Knee Stability With Medial-Pivot, Cruciate-Substituting, and Posterior-Stabilized Total Knee Arthroplasty: A Retrospective Study
Verified date | December 2017 |
Source | Spokane Joint Replacement Center |
Contact | n/a |
Is FDA regulated | No |
Health authority | |
Study type | Observational |
A retrospective one-time evaluation of total knee patients one year or more postoperative, to compare antero-posterior (AP) stability with the TELOS Stress device/stress x-rays and clinical outcomes. Multiple implant brand/models will be included in the study.
Status | Completed |
Enrollment | 100 |
Est. completion date | December 2017 |
Est. primary completion date | December 2017 |
Accepts healthy volunteers | No |
Gender | All |
Age group | 21 Years to 80 Years |
Eligibility |
Inclusion Criteria: - Patients willing to sign the informed consent. - Patients able to comply with study requirements including stress x-rays and self-evaluations. - Male and non-pregnant females ages 21 - 80 years of age at the time of surgery. - Patients who have undergone a primary total knee replacement, are one year or greater postoperative, and are not having any evidence of failure of their implants. - Patients with a diagnosis of osteoarthritis (OA), traumatic arthritis (TA), or avascular necrosis (AVN). - Patients with intact collateral ligaments. - Range of motion within five degrees of full extension and a minimum of 120 degrees of flexion. Exclusion Criteria: - Patients with inflammatory arthritis. - Patients that are morbidly obese, body mass index (BMI) > 40. - Patients that have had a high tibial osteotomy or femoral osteotomy. - Patients with neuromuscular or neurosensory deficiency, which would limit the ability to assess the performance of the device. - Patients with a systemic or metabolic disorder leading to progressive bone deterioration. - Patients that are immunologically compromised, or receiving chronic steroids (>30 days), excluding inhalers. - Patients bone stock is compromised by disease or infection, which cannot provide adequate support and/or fixation to the prosthesis. - Patients with knee fusion to the affected joint. - Patients with an active or suspected latent infection in or about the knee joint. - Patients that are prisoners. |
Country | Name | City | State |
---|---|---|---|
United States | Spokane Joint Replacement Center | Spokane | Washington |
Lead Sponsor | Collaborator |
---|---|
David F. Scott, MD |
United States,
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Measurement of antero-posterior stability of the knee with stress x-rays. | Antero-posterior stability of the knee will be measured with stress x-rays using the TELOS Stress device in 45° and 90° flexion. Stress x-rays will be obtained during a single visit for subjects 1 year or greater post-operatively. | 1 year post-operative | |
Secondary | Knee Society Score (KSS) | Clinical outcomes will be evaluated via the Knee Society Score (KSS) obtained during a single visit for subjects 1 year or greater post-operatively. The KSS is subdivided into a Knee Assessment score which rates only the knee joint itself, and a Functional Assessment score which rates the subject's ability to walk and climb stairs. Both scores range from 0-100, with a higher score indicating a better outcome. | 1 year post-operative | |
Secondary | Lower Extremity Activity Scale (LEAS) | Clinical outcomes will be evaluated via the Lower Extremity Activity Scale (LEAS) obtained during a single visit for subjects 1 year or greater post-operatively. The LEAS scale range is 1-18, with a higher value indicating a higher level of activity. | 1 year post-operative | |
Secondary | Forgotten Joint Score (FJS) | Clinical outcomes will be evaluated via the Forgotten Joint Score (FJS) obtained during a single visit for subjects 1 year or greater post-operatively. The FJS total score range is 0-100, with higher scores indicating a higher degree of "forgetting" the artificial joint, that is, a lower degree of awareness. | 1 year post-operative |
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