Triathlon Total Stabilizer (TS) Outcomes Study

This study is ongoing, but not recruiting participants.
Information provided by (Responsible Party):
Stryker Orthopaedics Identifier:
First received: August 11, 2009
Last updated: October 1, 2014
Last verified: October 2014

This study will be a prospective, non-randomized evaluation of the change between preoperative and postoperative outcomes for those receiving the Triathlon® TS Total Knee System for a revision knee operation. When available, the Triathlon® TS Extended Condyle Femur (ECF) may also be included. The mean total Knee Society Score (for pain, motion and function) change is not 10% worse than, or is superior to, the expected change according to published revision total knee replacement data, for cases implanted with the Triathlon® TS Total Knee System as compared from preoperative to 2 years postoperative.

Condition Intervention
Arthroplasty, Replacement, Knee
Device: Triathlon TS Knee System

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: A Prospective, Post-market, Multi-center Study of the Outcomes of the Triathlon® Total Stabilizer (TS) Total Knee System

Resource links provided by NLM:

Further study details as provided by Stryker Orthopaedics:

Primary Outcome Measures:
  • Knee Society Score (KSS) [ Time Frame: 2 years ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • Joint Line restoration on postop stability, anterior knee pain & functional performance. [ Time Frame: 6 weeks ] [ Designated as safety issue: No ]
  • Preop & postop outcomes other than the KSS (SF-36, KOOS, HSS Patella Score, Krackow Activity Scale) [ Time Frame: 5 years ] [ Designated as safety issue: No ]
  • Radiographic stability, revision rates and complications [ Time Frame: 5 years ] [ Designated as safety issue: Yes ]

Enrollment: 181
Study Start Date: July 2009
Estimated Study Completion Date: April 2019
Estimated Primary Completion Date: April 2016 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Triathlon TS Knee
Triathlon TS Knee System
Device: Triathlon TS Knee System
Total knee replacement for revision cases


Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Patient has signed an IRB approved, study specific Informed Patient Consent Form.
  • Patient is a male or non-pregnant female age 18 years or older at time of study device implantation.
  • Patient is a candidate for revision of all femoral and tibial components of a total knee replacement.
  • Patient is willing and able to comply with postoperative scheduled clinical and radiographic evaluations and rehabilitation.

Exclusion Criteria:

  • Patient has a Body Mass Index (BMI) > 40.
  • Patient has an active or suspected latent infection in or about the affected knee joint at time of study device implantation.
  • Patient has a neuromuscular or neurosensory deficiency, which limits the ability to evaluate the safety and efficacy of the device.
  • Patient is diagnosed with a systemic disease (e.g. Lupus Erythematosus) or a metabolic disorder (e.g. Paget's Disease) leading to progressive bone deterioration.
  • Patient is immunologically suppressed or receiving steroids in excess of normal physiological requirements (e.g. > 30 days).
  • Patient has a failed unicondylar knee prosthesis.
  • Patient has a known sensitivity to device materials.
  • Patient is a prisoner.
  Contacts and Locations
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, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00958789

United States, Arizona
Sun City West, Arizona, United States, 85375-5855
United States, Florida
Heekin Orthopaedic Institute for Research, Inc.
Jacksonville, Florida, United States, 32204
United States, Illinois
Midwest Orthopaedics at Rush
Chicago, Illinois, United States, 60612
United States, Massachusetts
Tufts Medical Center
Boston, Massachusetts, United States, 02111
United States, New Jersey
Rothman Institute
Egg Harbor Township, New Jersey, United States, 08234
Ridgewood Orthopedics
Ridgewood, New Jersey, United States, 07450
United States, New York
Upstate Bone and Joint Center
East Syracuse, New York, United States, 13057
United States, North Carolina
University of North Carolina Orthopedics
Chapel Hill, North Carolina, United States, 27599
Duke University Medical Center
Durham, North Carolina, United States, 27703
United States, Ohio
Wellington Orthopaedic & Sports Medicine
Cincinnati, Ohio, United States, 45255
United States, Oklahoma
The Orthopaedic Center
Tulsa, Oklahoma, United States, 74120
United States, Texas
Scott & White Clinic
Temple, Texas, United States, 76508
Sponsors and Collaborators
Stryker Orthopaedics
Study Chair: Kirby D Hitt, M.D. Scott & White Hospital
  More Information

No publications provided

Responsible Party: Stryker Orthopaedics Identifier: NCT00958789     History of Changes
Other Study ID Numbers: 65
Study First Received: August 11, 2009
Last Updated: October 1, 2014
Health Authority: United States: Institutional Review Board processed this record on August 03, 2015