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NCT Number: NCT04594993

INFINITY™ With ADAPTIS™ Technology Study

INFINITY™ with ADAPTIS™ Technology Total Ankle Replacement Follow-up (ITAR2) - Prospective, multi-site, multi-year post-market clinical follow-up study Study Group Primary/Unilateral and/or bilateral Total Ankle Arthroplasty subjects implanted with INFINITY™ Total Ankle System Number of Subjects 200 patients with up to 13 sites

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This study is active but is not currently recruiting participants.

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Key information

Conditions

Arthritis, Rheumatoid Arthritis Autoimmune Diseases Connective Tissue Diseases Immune System Diseases Joint Diseases Musculoskeletal Diseases Rheumatic Diseases Skin and Connective Tissue Diseases

Age range

22 year and older

Sex eligibility

All sexes

Study type

Observational

Primary location

OrthoArizona Foot and Ankle Institute, Gilbert, Arizona, United States

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About this study

The selected design is a multi-center, non-randomized, prospective study of 200 subjects in the US with up to 13 investigational sites and a potential for more as needed to meet the enrollment requirements. The study subjects included are those with ankle joints damaged by severe rheumatoid arthritis, post-traumatic disease, and degenerative arthritis and implanted with the INFINITY™ With ADAPTIS™ Technology Total Ankle System.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Be over 22 years of age at the time of surgery;
  • Diagnosed with unilateral and/or bilateral ankle joint disease;
  • Diagnosed with ankle joint damage from rheumatoid arthritis, post-traumatic, or degenerative arthritis;
  • Willing and able to consent to participate (written, informed consent;
  • Willing and able to attend the requested follow-up visits;
  • A clinical decision has been made to use INFINITY™ with ADAPTIS™ Technology Total Ankle System replacement prior to enrollment.

Exclusion criteria

  • Subjects with an ankle condition, as determined by the investigator, to be an inappropriate candidate for a total ankle replacement;
  • Subjects requiring revision total ankle replacement of the ankle being considered for study

Treatment and study plan

INFINITY™ with ADAPTIS™ Technology Total Ankle System

Device

Total Ankle Replacement

Primary outcomes

  1. Measure survivorship of INFINITY™ with ADAPTIS™ Technology Total Ankle System at 10 years

    Time frame: 10 years

    Assess the 10-year survivorship of 200 patients implanted with the INFINITY™ with ADAPTIS™ Technology Total Ankle System is non-inferior to other, similar devices.

Secondary outcomes

  1. Radiographic Evaluation- Physician Reported Questionnaire

    Time frame: 10 years

    Identify and assess the implant for component loosening and/or subsidence, any radiolucency and/or cyst formation through radiographic evaluation early and throughout the lifetime of the implant.

  2. PROMIS® Global Health Questionnaire

    Time frame: 10 years

    Compare the improvements in self-reported physical, mental, and social health measures from pre-op through 10 years post operatively; assessed by PROMIS® Global HealthThe PROMIS Global-10 is a 10-item patient-reported questionnaire in which the response options are presented as 5-point (as well as a single 11-point) rating scales. The results of the questions are used to calculate two summary scores: a Global Physical Health Score and a Global Mental Health score. These scores are then standardized to the general population, using the "T-Score". The average "TScore" for the United States population is 50 points, with a standard deviation of 10 points. Higher scores indicate a healthier patient.

  3. Ankle Osteoarthritis Score (AOS) Questionnaire

    Time frame: 10 years

    Compare pain and functional improvement in the Ankle Osteoarthritis Score (AOS). AOS is a reliable, validated, visual analog-based,AOS is a reliable, validated, visual analog-based, disease-specific self-administered instrument designed specifically to measure disability and pain from ankle osteoarthritis. Both Pain and Disability components are used to calculate the total score. The score is from zero to one hundred with a lower score indicating more normal function. A minimal clinically important difference (MCID) for the Total AOS score reduction from baseline has been established: 12.35 points.

  4. Foot & Ankle Observational Score (FAOS) questionnaire.

    Time frame: 10 years

    Compare the improvement in patient/physician reported function scores from pre-op through 10 years post-operatively, assessed by the Foot & Ankle Observational Score (FAOS) questionnaire. The FAOS is a self-report measure that evaluates symptoms and functional limitations in individuals with generalized foot and ankle disorders. Items for the FAOS were adapted from the Knee Injury and Osteoarthritis Outcome Score. The FAOS is composed of the following 5 subscales: pain (9 items), other symptoms (7 items), activities of daily living (7 items), sports and recreational activities (5 items), and foot and ankle-related quality of life (4 items). Each subscale has a potential range from 0 to 100. Where 100 indicates no problems and 0 indicates extreme problems.

  5. Patient Satisfaction of Total Ankle Replacement (TAR)

    Time frame: 10 years

    Compare patient satisfaction of total ankle replacement (TAR) post operatively utilizing a four-point scale.

Sponsors and collaborators

Lead sponsor

Stryker Trauma and Extremities

Industry

Registry information

Official study title

INFINITY™ With ADAPTIS™ Technology Total Ankle Replacement Follow-Up

Acronym: ITAR2

Important dates

Study start
2021
Primary completion
2033
Study completion
2035
First posted
Oct 20, 2020
Registry last updated
Mar 25, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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