ClinicalTrials.gg
Not yet recruitingNCT07831265Updated Sep 23, 2026

Dynamic Fixation for Complex Ankle Fractures With Syndesmotic Diastasis.

An interventional study of the dynamic fixation and the screw fixation in Ankle Fractures and Syndesmotic Injury of the Ankle, sponsored by Fuzhou University Affiliated Provincial Hospital. Not yet recruiting. Open to participants aged 18 Years to 55 Years. Per ClinicalTrials.gov, last updated 2026-09-23.

Sponsored by Fuzhou University Affiliated Provincial Hospital · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
100
Allocation
Randomized
Ages
18 Years to 55 Years
Sex
All
01

Study summary

This prospective randomized controlled trial aims to evaluate the clinical effectiveness of dynamic fixation in patients with complex ankle fractures associated with syndesmotic diastasis.

Patients undergoing surgical treatment for complex ankle fractures with syndesmotic diastasis at Fujian Provincial Hospital Affiliated with Fuzhou University between October 2026 and October 2027 will be enrolled. Eligible participants will be randomly assigned in a 1:1 ratio to either the screw fixation (SF) group or the dynamic fixation (DF) group. All participants will be followed for 12 months after surgery. Clinical, functional, and radiographic outcomes will be compared between the two groups to assess the effectiveness and safety of dynamic fixation.

Statistical analyses will be performed using IBM SPSS Statistics version 27.0. The primary analysis will follow the intention-to-treat principle. Appropriate statistical methods will be selected according to the type and distribution of the data. Multivariable regression analyses will be performed when necessary to adjust for potential confounding factors. Missing data will be handled using multiple imputation where appropriate, and sensitivity analyses will be conducted to evaluate the robustness of the findings. All statistical tests will be two-sided, with a P\<0.05 considered statistically significant.

02

Conditions studied

  • Ankle Fractures
  • Syndesmotic Injury of the Ankle

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03

In context

Ankle Fractures

202 studies on the registry are indexed under Ankle Fractures; 44 are open to participants now.

This study's planned enrollment of 100 is above the median of 90 across 150 interventional studies indexed under Ankle Fractures.

Browse Ankle Fractures studies →

Lead sponsor

Fuzhou University Affiliated Provincial Hospital is the lead sponsor of 4 studies on the registry; 4 are open to participants now.

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

04

Who can participate

Ages eligible
18 Years to 55 Years
Sexes eligible
All
Accepts healthy volunteers
No

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

  • Age 18-55 years
  • Radiologically confirmed complex ankle fracture combined with distal tibiofibular syndesmosis separation
  • First-time surgical treatment of the ankle
  • Time from injury to surgery ≤ 2 weeks
  • Able to comply with follow-up and sign a written
  • Ankle function was basically normal before injury

Exclusion criteria

Exclusion Criteria:

  • Age \<18 or >55
  • Pathological fracture
  • Previous ankle surgery or serious primary ankle disease
  • Time from injury to surgery >2 weeks
  • Active infection or serious medical condition
  • Severe neurological or psychiatric disorder affecting follow-up compliance
  • women
  • Other situations not suitable for enrollment
Terms in these criteria, in plain language(2)

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.

Postmenopausal

Periods have stopped for good: usually no period for 12 months in a row without another medical reason, sometimes confirmed by a blood test (FSH).

05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
100 participants (estimated)

Study arms

  • Active comparator
    the screw fixation group

    Device: the screw fixation

  • Experimental
    the dynamic fixation group

    Device: the dynamic fixation

Interventions

  • Devicethe dynamic fixation

    Randomized controlled grouping was conducted under blind conditions, followed by treatment of complex ankle fractures with distal tibiofibular syndesmosis separation using dynamic internal fixation surgical methods.

  • Devicethe screw fixation

    "Randomized controlled grouping was conducted under blind conditions, followed by treatment of complex ankle fractures with distal tibiofibular syndesmosis separation using screw fixation surgical methods.

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What researchers measure

Primary outcomes

  1. The American Orthopaedic Foot and Ankle Society (AOFAS)

    The American Orthopaedic Foot and Ankle Society (AOFAS) , Ankle-Hindfoot Score ranges from a minimum of 0 to a maximum of 100, with higher scores indicating better ankle-hindfoot function and fewer symptoms.

    Time frame: Preoperative; 1 week, 1 month, 3 months, 6 months, 1 year postoperative

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Study locations

No study locations are listed for this record.

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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

Start is estimated for Oct 2026; primary completion for Oct 2028, 24 months later.

Of 69 non-industry interventional studies with no phase under Ankle Fractures, half reached primary completion within 44 months of starting (the median), counting those still running; a quarter within 23 and three quarters within 61. This study's planned 24 months is below that.

Counting every sponsor, half of 72 studies reached it within 45 months; a quarter within 23 and three quarters within 61.

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

Registered
Sep 15, 2026
First posted
Sep 21, 2026
StartEst.
Oct 1, 2026
Primary completionEst.
Oct 1, 2028
CompletionEst.
Oct 1, 2028
Last update
Sep 23, 2026
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 Sep 23, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT07831265
Lead sponsor
Fuzhou University Affiliated Provincial Hospital
Responsible party
Zun Lin Cai (Principal Investigator, Fuzhou University Affiliated Provincial Hospital) — Principal investigator
First posted
Sep 21, 2026
Start date
Oct 1, 2026 (estimated)
Primary completion
Oct 1, 2028 (estimated)
Completion
Oct 1, 2028 (estimated)
Last update
Sep 23, 2026

Study contacts

ZunLinCai
Contact
2893761828@qq.com
86+15345912057

Oversight

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

Not currently enrolling

This study is not yet recruiting, as verified in Sep 2026. You cannot join it, but the record below documents what was studied.

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