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UK Infinity, Post-Market Clinical Follow-up Study

UK Multi-Centre, Observational, Post-Market Clinical Follow-up of the INFINITY® Total Ankle System

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT03063593
Enrollment
500
Registered
2017-02-24
Start date
2016-04-29
Completion date
2029-12-31
Last updated
2026-08-28

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Arthritis, Rheumatoid, Degenerative Arthritis, Post-traumatic Osteoarthritis

Brief summary

Study Title UK Post-Market Clinical Follow-Up Of The INFINITY® Total Ankle System Study Design 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 500 with 10 sites

Detailed description

Study Title UK Post-Market Clinical Follow-Up Of The INFINITY® Total Ankle System Study Design 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 N Subjects 500 with 10 sites Follow-Up Schedule Subject enrollment will consist of a Pre-operative, Operative, 6 months, 1 yr., 2 yr., 5yr., 7 yr., 10 yr., and an unscheduled visit as needed. Primary Objective Evaluate the long-term survivorship of the INFINITY® implant over 10 years Secondary Objective(s) Secondary objectives assessed will be to: * Identify and assess the implant for component loosening and/or subsidence, any osteolysis and/or cyst formation through radiographic evaluation early and throughout the lifetime of the implant. * Compare the improvements in self-reported pain and social interaction for quality of life measures from pre-op through 10 years post operatively; assessed by EuroQol (EQ5D5L). * Compare pain and functional improvement in the Ankle Osteoarthritis Score (AOS), which is a visual analogue scale specifically designed as a modification of the Foot Function Index. * Compare the improvement in self-reported pain-free function scores from pre-op through 10 years post-operatively, assessed by the Manchester Oxford Foot Questionnaire (MOXFQ) walking/standing scores. * Identify and report the safety of the implant in terms of complications and adverse events. Inclusion Criteria Subjects to be included in the study must meet all of the following criteria: * Be 21 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 / witnessed verbal consent) Willing and able to attend the requested follow-up visits; * Subjects determined by the Investigator to be an appropriate candidate for the INFINITY® Total Ankle System Exclusion Criteria Subjects will be excluded from the study if they meet any of the following 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

Interventions

None listed

Sponsors

Stryker Trauma and Extremities
Lead SponsorINDUSTRY

Study design

Observational model
OTHER
Time perspective
PROSPECTIVE

Eligibility

Sex/Gender
ALL
Age
21 Years to No maximum
Healthy volunteers
No

Inclusion criteria

Subjects to be included in the study must meet all of the following criteria: * Be 21 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 / witnessed verbal consent) Willing and able to attend the requested follow-up visits; * Subjects determined by the Investigator to be an appropriate candidate for the INFINITY® Total Ankle System

Exclusion criteria

Subjects will be excluded from the study if they meet any of the following 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

Design outcomes

Primary

MeasureTime frameDescription
Primary Outcome Measure survivorship at 10 years10 YearsThe primary outcome measure of this post-market clinical observational study is to collect data relating to the INFINITY® Total Ankle System performance/survivorship at up to 10 years.

Secondary

MeasureTime frameDescription
EQ5D-EuroQol-questionnaireFrom pre-op through 10 yearsCompare the improvement in self-reported pain and social interaction for quality of life measures
Ankle Osteoarthritis Score (AOS)-questionnaireFrom Pre-op through 10 yearsSelf-reported to compare pain and functional improvement, which is a visual analogue scale specifically designed as a modification of the Foot function Index
Manchester Oxford Foot Questionnaire (MOXFQ)-questionnaireFrom Pre-op through 10 yearsCompare the improvement in self-reported pain-free function scores (walking/standing scores)
Radiographic evaluation-physician reported questionnaireFrom Pre-op through 10 yearsidentify and assess the implant for component loosening and/or subsidence, any osteolysis and/or cyst formation

Countries

United Kingdom

Contacts

STUDY_CHAIRDavid Townshend, MD

Northumbria Trust

STUDY_DIRECTORRebecca Gibson

Stryker Trauma & Extremeties

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Aug 29, 2026