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2-Year Post-Approval Study to Investigate the Scandinavian Total Ankle Replacement System (STAR) Ankle Under Actual Conditions of Use

This study is currently recruiting participants. (see Contacts and Locations)
Verified November 2014 by Stryker Trauma GmbH
Information provided by (Responsible Party):
Stryker Trauma GmbH Identifier:
First received: November 2, 2010
Last updated: November 26, 2014
Last verified: November 2014

The purpose of this study is to examine how well the Scandinavian Total Ankle Replacement (STAR) performs using new instrumentation and a new surgeon training program. Results of this study will be compared to the results from the original clinical trial.

Condition Intervention
Primary Arthrosis
Post Traumatic Arthritis
Rheumatoid Arthritis
Device: Scandinavian Total Ankle Replacement System (STAR Ankle)

Study Type: Interventional
Study Design: Endpoint Classification: Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: 2-Year Post-Approval Study to Investigate the STAR Ankle Under Actual Conditions of Use

Resource links provided by NLM:

Further study details as provided by Stryker Trauma GmbH:

Primary Outcome Measures:
  • The principal endpoint consists of evaluating the safety and effectiveness of the STAR Ankle using the same composite definition of patient success used in the IDE study. [ Time Frame: 2 years ] [ Designated as safety issue: Yes ]

Secondary Outcome Measures:
  • American Orthopaedic Foot and Ankle Society Score questionnaire will be used to evaluate and monitor the progress of patients following foot and ankle surgery. [ Time Frame: 2 years ] [ Designated as safety issue: No ]

Estimated Enrollment: 98
Study Start Date: November 2010
Estimated Study Completion Date: December 2016
Estimated Primary Completion Date: December 2016 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Device: Scandinavian Total Ankle Replacement System (STAR Ankle)
Device: Scandinavian Total Ankle Replacement System (STAR Ankle)
For total ankle replacement
Other Name: STAR

Detailed Description:

STAR 2 year study is a prospective, multi-center, single-arm study.


Ages Eligible for Study:   18 Years to 85 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Moderate or severe pain, loss of mobility and function of the ankle (Buechel-Pappas Scale)
  • Primary arthrosis, post traumatic arthrosis or rheumatoid arthrosis
  • At least six months of conservative treatment for severe ankle conditions, confirmed by the patient medical history, radiograph studies and medication record
  • Willing and able to give informed consent

Exclusion Criteria:

  • Patients who have not reached skeletal maturity
  • Active or prior deep infection inthe ankle joint or adjacent bones
  • Prior arthrodesis at the involved site
  • History of prior mental illness or patient demonstrates that their mental capacity may interfere with their ability to follow the study protocol
  • Obesity (weight greater than 250 lbs)
  • History of current prior drug abuse or alcoholism
  • Any physical condition precluding major surgery
  • Hindfoot malpositioned by more than 35 degrees or forefoot malalignment which would preclude a plantigrade foot
  • Lower extremity vascular insufficiency demonstrated by Doppler arterial pressure
  • Avascular necrosis of the talus
  • Inadequate skin coverage above the ankle joint
  • Patients under the age of 35 who are unwilling or unable to accept the physical limitations imposed by ankle arthroplasty, including limitations on certain vigorous physical activities (e.g. basketball, football) and on manual labor
  • Juvenile onset Type I diabetes
  • Adult onset Type II diabetes when accompanied by neuropathic changes or a history of foot infection in either foot
  • Pregnancy
  • Avascular necrosis of the tibia
  • Significant bone tumor of the foot or ankle
  • Severe deformity that would not normally be eligible for ankle surgery
  • Prior surgery and/or injury that has adversely affected the ankle bone stock
  • Severe osteoporotic or osteopenic condition or other conditions that may lead to inadequate implant fixation in the bone
  • Insufficient ligament support
  • Motor dysfunction due to neuromuscular impairment
  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: NCT01284283

Contact: Rebecca Gibson

United States, Michigan
William Beaumont Hospital Recruiting
Royal Oak, Michigan, United States, 48085
Contact: Kristy McCandlish   
Principal Investigator: Allen Grant, MD         
United States, New York
Kenneth Mroczek, MD-NYU Recruiting
New York City, New York, United States, 10003
Contact: Cara Fontaine   
Principal Investigator: Kenneth Mroczek, MD         
Sub-Investigator: Cary Chapman, MD         
Sub-Investigator: Steven Sheskier, MD         
United States, Pennsylvania
University of Pennsylvania Health Systems-PA Foot and Ankle Surgeons Recruiting
Philadelphia, Pennsylvania, United States, 19106
Contact: Marianne Ostrowe   
Principal Investigator: Keith L Wapner, MD         
United States, Texas
Center for Foot and Ankle Restoration Recruiting
Dallas, Texas, United States, 75231
Contact: Amber Moore   
Principal Investigator: Charles E Cook, MD         
Sponsors and Collaborators
Stryker Trauma GmbH
  More Information

No publications provided

Responsible Party: Stryker Trauma GmbH Identifier: NCT01284283     History of Changes
Other Study ID Numbers: STAR 2 Year
Study First Received: November 2, 2010
Last Updated: November 26, 2014
Health Authority: United States: Institutional Review Board

Keywords provided by Stryker Trauma GmbH:
Rheumatoid Arthrosis
Arthritic joint
Rheumatoid Arthritis

Additional relevant MeSH terms:
Arthritis, Rheumatoid
Autoimmune Diseases
Connective Tissue Diseases
Immune System Diseases
Joint Diseases
Musculoskeletal Diseases
Rheumatic Diseases processed this record on March 03, 2015