Foot and Ankle Arthrodesis or Osteotomy With Io-Fix Type Fixation

July 9, 2026 updated by: Universitaire Ziekenhuizen KU Leuven

Foot and Ankle Arthrodesis or Osteotomy With Io-Fix Type Fixation : a Prospective Study

The recovery of foot and ankle arthrodesis and osteotomy is still plagued by the problem of delayed consolidation or even pseudo-arthrosis. To date, the foot and ankle unit of UZ Leuven is using a state of the art system, called the Io-Fix system, to optimize the biomechanical stability.

However, the current literature lacks studies assessing and quantifying the advantages of the Io-Fix system. Objective presentations about the use of, and (early) results are currently missing. Therefore, the investigators want to take their responsibility to objectively investigate whether they can confirm and quantify the expected positive results of using the Io-Fix system. Subsequently, the investigators want to search for eventual unexpected problems with Io-Fix.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

The recovery of foot and ankle arthrodesis and osteotomy is still plagued by the problem of delayed consolidation or even pseudo-arthrosis. Some known risk factors for delayed consolidation are inherent to the patient and /or cannot be easily corrected by the surgeon: smoking, diabetes mellitus, use of NSAIDS, etc. Many other biological risk factors are well known. The fusion rate is one of these factors. This factor is influenced by the mechanical stability and compression at the level of arthrodesis. The right alignment till the moment of consolidation is an important factor as well.

Currently, two concepts leading to a better fusion rate are under investigation. First, research is done to optimize the local biological factors by using concentrated growth factors. Second, researchers are working towards optimal biomechanical stability and compression by further developing per-operative osteosynthesis material.

Following the optimal biomechanical stability concept, the following innovation was recently released: the Io-Fix system of Extremity Medical L.L.C. (Parsippany , NJ). This state of the art system has clear advantages compared to other systems. Based on the well-expected advantages, the Foot and Ankle unit of UZ Leuven has been using this system since more than one year. The initial subjective results with Io-Fix are strongly positive.

However, the current literature lacks studies assessing and quantifying the advantages of the Io-Fix system. Objective presentations about the use of, and (early) results are currently missing. Therefore, the investigators want to take their responsibility to objectively investigate whether they can confirm and quantify the expected positive results of using the Io-Fix system. Subsequently, the investigators want to search for eventual unexpected problems with Io-Fix.

However, the investigators believe that a larger study groups within a prospective framework with a longer follow-up is mandatory.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
208

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Belgium
    • Vlaams-Brabant
      • Leuven, Vlaams-Brabant, Belgium, 3000
        • UZ Leuven

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Being routinely scheduled for a reconstructive surgical procedure for the following indications or involving the following type of procedure

    1. Any reconstructive procedure for Pes Planus, Pes Plano-valgus, or Posterior Tibial Tendon Dysfunction
    2. Tibio-talar arthrodesis or prosthesis
    3. Sub-talar -and/or (partial) Chopart - and/or Triple arthrodesis

    4. Pantalar arthrodesis with or without inclusion of the Chopart joint

      Exclusion Criteria:

  • Age under 18

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Other
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Other: Foot and ankle arthrodesis or osteotomy
Patients who underwent a foot- or ankle reconstruction surgery using the Io-Fix system
Other: Follow-up of Io-Fix type fixation
Follow-up of patients who underwent a foot- or ankle reconstruction surgery using the Io-Fix system

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Radiological and clinical evaluation
Time Frame: within a period of 1 year
Radiological and clinical evaluation will be combined to determine the fusion rate within a measured time span
within a period of 1 year

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Short Form 36 Health Survey Questionnaire (SF-36)
Time Frame: within a period of 1 year
To capture patients' perceptions of their own health and well-being
within a period of 1 year
American Orthopedic Foot and Ankle Score (AOFAS)
Time Frame: within a period of 1 year
To measure the outcome of treatment in patients who sustained a complex ankle or hindfoot injury
within a period of 1 year

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Universitaire Ziekenhuizen KU Leuven

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
April 1, 2014

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
September 24, 2021

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
September 24, 2021

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
March 17, 2021

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
March 22, 2021

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
March 23, 2021

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
July 10, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 9, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
July 1, 2024

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • S56535

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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