COVID-19 is an emerging, rapidly evolving situation.
Get the latest public health information from CDC:

Get the latest research information from NIH: Menu

Foundation Knee Study - Retrospective

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00764894
Recruitment Status : Terminated (Enrollment and data collection insufficient to continue study.)
First Posted : October 2, 2008
Last Update Posted : February 9, 2011
Information provided by:
Encore Medical, L.P.

Brief Summary:
The purpose of this study is to evaluate the use and efficacy of the Encore Foundation Knee System in a group of 200 patients for whom data has already been collected.

Condition or disease Intervention/treatment
Osteoarthritis Post-traumatic Arthritis Inflammatory Tissue Disorders Arthritis Secondary to Other Diseases Avascular Necrosis of the Femoral Condyles Device: Foundation Knee

Layout table for study information
Study Type : Observational
Estimated Enrollment : 200 participants
Observational Model: Cohort
Time Perspective: Retrospective
Official Title: Post-Market Study of the Foundation Knee System
Study Start Date : October 2007
Actual Primary Completion Date : February 2011
Actual Study Completion Date : February 2011

Group/Cohort Intervention/treatment
Foundation Knee
Retrospective data collection on 510(k) approved device
Device: Foundation Knee
Subjects with degenerative joint disease (DJD), osteoarthritis or rheumatoid arthritis who received a primary Foundation Knee replacement and is willing to participate in the study.

Primary Outcome Measures :
  1. The use and efficacy of the Encore Foundation Knee System [ Time Frame: 2 year ]

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Individuals who meet the indications for use of the Foundation Knee device AND who meet the inclusion/exclusion criteria

Inclusion Criteria:

  • Have knee joint disease related to one or more of the following

    • osteoarthritis
    • post-traumatic arthritis
    • inflammatory tissue disorders
    • arthritis secondary to other diseases
    • Avascular necrosis of the femoral condyles;
  • Skeletal maturity
  • Less than 70 on the Knee Society Score (rating score)
  • Sufficient bone stock, as judged by radiographs, to support primary knee implant
  • Sufficient collateral ligaments to support the device, as judged by physician during stability testing (varus/valgus and flexion/extension) and less than 45 degree varus/valgus deformity and/or 90 degree flexion contracture
  • Patient is likely to be available for evaluation for the duration of the study
  • Able and willing to sign the informed consent and follow study procedures
  • Patient is not pregnant
  • No infection present
  • No known materials sensitivity

Exclusion Criteria:

  • Skeletal immaturity
  • Greater than or equal to 70 on preoperative Knee Society Score (Rating Score)
  • Post-patellectomy
  • Insufficient bone quality which may affect implant stability
  • Insufficient collateral ligaments, as judged by the physician. Greater than 45 degree varus/valgus deformity and/or 90 degree flexion contracture.
  • Neurological conditions that might hinder patient's ability to follow study procedures (i.e., any that restrict physical activities such as Parkinson's Disease, Multiple Sclerosis, previous stroke which affects lower extremity)
  • Mental conditions that may interfere with ability to give an informed consent or willingness to fulfill the study requirements (i.e., severe mental retardation such that the patient cannot understand the informed consent process, global dementia, prior strokes that interfere with the patient's cognitive abilities, senile dementia, and Alzheimer's Disease)
  • Prisoners
  • Conditions that place excessive demand on the implant (i.e. Charcot's joints, muscle deficiencies, refusal to modify postoperative physical activities, skeletal immaturity)
  • Patient is pregnant
  • Infection present
  • Materials sensitivity

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00764894

Layout table for location information
United States, Florida
Hussamy Orthopedics
Vero Beach, Florida, United States, 32960
Sponsors and Collaborators
Encore Medical, L.P.
Layout table for investigator information
Principal Investigator: Omar Hussamy, M.D. Hussamy Orthopedics
Additional Information:
Layout table for additonal information
Responsible Party: Jane M. Jacob Ph.D., DJO Surgical Identifier: NCT00764894    
Other Study ID Numbers: PS - 701
First Posted: October 2, 2008    Key Record Dates
Last Update Posted: February 9, 2011
Last Verified: February 2011
Additional relevant MeSH terms:
Layout table for MeSH terms
Joint Diseases
Musculoskeletal Diseases
Pathologic Processes