ClinicalTrials.gg
CompletedNCT04893824Updated Nov 15, 2023

Grappler® Interference Screw Post-Market Clinical Follow-Up Study

An observational study in Ankle Injuries, Syndesmotic Injuries and Ankle Inversion Sprain, sponsored by Paragon 28. Completed at 1 site in United States. Per ClinicalTrials.gov, last updated 2023-11-15.

Sponsored by Paragon 28 (part of Zimmer Biomet) · Observational

Study type
Observational
Model
Case-only
Time perspective
Other
Enrollment
50
Sex
All
01

Study summary

Ambispective, multi-surgeon, single site, consecutive case series to determine the safety, performance, and benefits of the Grappler(R) Interference Screw.

Read the detailed description

This is a ambispective, multi-surgeon, single site, consecutive case series. Data collection will occur in two phases. Retrospective data collection will occur upon subject identification, and data will be collected from the site's medical records for minimum of 50 subjects who have undergone soft tissue to bone fixation with the Grappler® Interference Screw System. Data will be collected from the subjects' pre-op visits, intra-op visits, 7 week post-op follow-up visits (± 4 weeks), and 6 month post-op follow-up visits (± 4 weeks). The subject must have adequate radiographic and medical records for the minimum follow up requirement of 6 months. Prospective data collection will occur upon subject's provision of written informed consent, and data will be collected from patient reported outcomes (PRO's).

02

Conditions studied

  • Ankle Injuries
  • Syndesmotic Injuries
  • Ankle Inversion Sprain
  • Deltoid Ankle Sprain
  • Achilles Tendon Rupture
  • Flexor Hallucis Longus on the Left
  • Flexor Digitorum Longus on the Left
  • Ankle Sprains
  • Flexor Hallucis Longus on the Right
  • Flexor Digitorum Longus on the Right

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03

In context

Ankle Injuries

350 studies on the registry are indexed under Ankle Injuries; 74 are open to participants now.

This study's enrollment of 50 is below the median of 84 across 73 observational studies indexed under Ankle Injuries.

Browse Ankle Injuries studies →

Lead sponsor

Paragon 28 is the lead sponsor of 8 studies on the registry; 1 is open to participants now.

First submitted before Paragon 28 became part of Zimmer Biomet.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
Child (0–17), Adult (18–64), Older adult (65+)
Sexes eligible
All
Sampling method
Non-probability sample

Study population

The investigational population will include a minimum of 50 subjects who have undergone a foot and/or ankle procedure that fulfill the eligibility criteria

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • The subject must have undergone a foot and/or ankle procedure involving soft tissue attachment to bone using the Grappler® Interference Screw System and completed by one of the designated investigators who are experienced in the use of such implants and the required specialized surgical techniques
  • The subject must have adequate radiographic and medical records for the minimum follow-up requirement of six months

For the Prospective Data Collection:

  • The subject is willing to provide written

Exclusion criteria

Exclusion Criteria:

  • None
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

05

Study design

Observational model
Case-only
Time perspective
Other
Enrollment
50 participants (actual)
Patient registry
No

Interventions

  • DeviceGrappler® Interference Screw System

    Foot and/or ankle procedure involving soft tissue attachment to bone using the Grappler® Interference Screw System

06

What researchers measure

Primary outcomes

  1. Incidence of revisions

    Safety will be assessed by recording the incidence of revisions. The relationship of events will be attributed to either the implant or instrumentation.

    Time frame: 6 Months Post-Op

  2. Incidence of adverse events

    Safety will be assessed by recording the incidence of adverse events. The relationship of events will be attributed to either the implant or instrumentation.

    Time frame: 6 Months Post-Op

  3. Incidence of complications

    Safety will be assessed by recording the incidence of complications. The relationship of events will be attributed to either the implant or instrumentation.

    Time frame: 6 Months Post-Op

Secondary outcomes

  1. Rate of recurrence of deformity

    Safety as related to rate of recurrence of deformity

    Time frame: 7 Weeks Post-Op, 6 Months Post-Op

  2. Rate of implant failure

    Safety as related to rate of implant failure

    Time frame: Intra-Op, 7 Weeks Post-Op, 6 Months Post-Op

  3. Rate of re-tear or re-rupture of fixated soft tissue

    Safety as related to rate of re-tear or re-rupture of fixated soft tissue

    Time frame: 7 Weeks Post-Op, 6 Months Post-Op

  4. Rate of screw removal

    Safety as related to rate of screw removal

    Time frame: 7 Weeks Post-Op, 6 Months Post-Op

  5. Foot and Ankle Mobility Measure

    Device performance and benefits as related to Foot and Ankle Mobility Measure Activities of Daily Living (0-84) and sports (0-32) subscales. The higher the score, the higher the level of function, with 100% representing no dysfunction.

    Time frame: 6 months post-operative

  6. Visual Analog Scale

    Device performance and benefits as related to pain levels based on the Visual Analog Scale (range: 0 to 100; 0 = no pain; 100 = worst pain imaginable)

    Time frame: 6 months post-operative

  7. Patient satisfaction

    Device performance and benefits as related to patient satisfaction (very satisfied, good, fair, not satisfied)

    Time frame: 6 months post-operative

07

Study locations

1 site
  • Orthopedic Foot and Ankle
    Worthington, Ohio 43085, United States
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Apr 2021 to primary completion in Mar 2022, 10 months.

Of 38 observational studies under Ankle Injuries, half reached primary completion within 11 months of starting (the median), counting those still running; a quarter within 5 and three quarters within 45. This study's 10 months is close to that.

How these figures are worked out, and which studies are left out of them.

Registered
May 11, 2021
First posted
May 20, 2021
StartActual
Apr 19, 2021
Primary completionActual
Mar 11, 2022
CompletionActual
Mar 25, 2022
Last update
Nov 15, 2023
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Nov 15, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04893824
Lead sponsor
Paragon 28
Responsible party
Sponsor
First posted
May 20, 2021
Start date
Apr 19, 2021
Primary completion
Mar 11, 2022
Completion
Mar 25, 2022
Last update
Nov 15, 2023

Study contacts

Jacy Legue
study director · Paragon 28

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
Yes
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Mar 2022. You cannot join it, but the record below documents what was studied.

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