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CompletedNCT00336752Updated Sep 7, 2016

Operative Versus Non Operative Treatment for Unstable Ankle Fractures

An interventional study of non operative treatment and operative treatment of ankle fractures in Ankle Injuries, sponsored by London Health Sciences Centre Research Institute and Lawson Research Institute of St. Joseph's. Completed at 1 site in Canada. Open to participants aged 18 Years to 65 Years. Per ClinicalTrials.gov, last updated 2016-09-07.

Sponsored by London Health Sciences Centre Research Institute and Lawson Research Institute of St. Joseph's · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
80
Allocation
Randomized
Ages
18 Years to 65 Years
Sex
All
01

Study summary

The purpose of the study is to compare functional outcomes and recovery following surgical and non surgical treatment of potentially unstable , isolated fibula fractures. Secondary objectives are to compare the re-operation rate, time to union and complications between the two treatment groups.

The primary research questions:

  1. Does surgery provide a better functional outcome compared to non operative treatment of undisplaced, unstable fractures?
  2. Do patients with these fractures return to activities faster after operative or non operative treatment?
  3. Are complications more common with operative or non operative care?
Read the detailed description

The most controversial ankle fracture is the Weber B fracture in which the fibular (or lateral malleolar) fracture begins at the level of the ankle mortise and extends proximal and lateral. This fracture can exist as isolated fractures of the lateral malleolus, or bimalleolar injuries in which both lateral and medial malleoli are fractured. When both malleoli are fractured, the ankle has lost all of its bony support and is unstable. In contrast, if only the lateral malleolus is injured, the Weber B injury may be either stable or unstable. When the ankle is subluxed or dislocated in these injuries, the ankle is clearly unstable. However, when the ankle is not initially subluxed, the assessment of stability is more difficult. Stability in isolated lateral malleolar fractures depends upon the status of the medial, or deltoid, ligaments. Further complicating matters, the deltoid ligament may be intact, partially torn, or completely torn such that there is a spectrum of stability for these injuries.Previous studies relied upon an assessment of tenderness over the ligament to determine instability, but this may not differentiate between partial and complete tears.

In North America, most surgeons would agree that markedly unstable definitely unstable ankle fractures are best treated surgically.Therefore, Weber B fractures which involve fractures of both the medial and lateral malleolus are best treated by surgical stabilization. Furthermore, Weber B fractures involving only the lateral malleolus, but which present with lateral subluxation of the talus, are definitely unstable and require fixation.

In contrast, controversy exists between surgeons regarding the optimal means of treating an undisplaced but potentially unstable fibula fracture. Many surgeons recommend routine operative fixation, while others recommend routine non-operative treatment.A clear rationale exists for both types of treatment.

The most important factor in treatment includes maintaining the reduction of the talus within the ankle mortise. Even 1 mm of displacement or lateral shift of the talus will affect ankle joint loading and lead to dysfunction and potentially arthritis. Other issues include the potential benefits of earlier mobilization and rehabilitation.

02

Conditions studied

  • Ankle Injuries

Keywords

  • undisplaced ,unstable wEBER B ankle fractures
  • operative intervention
  • non operative intervention
03

In context

Ankle Fractures

194 studies on the registry are indexed under Ankle Fractures; 46 are open to participants now.

This study's enrollment of 80 is below the median of 93 across 147 interventional studies indexed under Ankle Fractures.

Browse Ankle Fractures studies →

Lead sponsor

London Health Sciences Centre Research Institute and Lawson Research Institute of St. Joseph's is the lead sponsor of 352 studies on the registry; 2 are open to participants now.

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

04

Who can participate

Ages eligible
18 Years to 65 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  1. Skeletally mature male or female \< 65 years of age
  2. Unstable ankle on stress exam: medial clear space ³ 5 mm: no Mortise shift on static radiographs
  3. Unilateral Weber B fibular fractures
  4. Closed fracture
  5. Provision of informed consent -

Exclusion criteria

Exclusion Criteria:

  1. Fractures not amenable to surgical treatment
  2. Pathologic fracture
  3. Associated injuries to the foot, ankle, tibia, or knee
  4. Associated medial malleolus fracture
  5. Surgical delay of >2 weeks from time of injury
  6. Previous fracture or retained hardware in the affected limb
  7. Associated neurovascular injury or deficit in the affected limb
  8. Systemic diseases including diabetes, multiple sclerosis, Parkinson's disease, and other disorders which might affect peripheral sensorimotor function -
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
80 participants (actual)

Study arms

  • Active comparator
    1

    Non operative treatment of Weber B ankle fracture. Use of cast, with no surgical intervention

    Procedure: non operative treatment

  • Active comparator
    2

    Operative treatment of Weber B ankle fracture. Open reduction and internal fixation to repair a broken bones.

    Procedure: operative treatment of ankle fractures

Interventions

  • Procedurenon operative treatment

    non operative treatment -casting for 6 weeks

  • Procedureoperative treatment of ankle fractures

    operative treatment of ankle fractures

06

What researchers measure

Primary outcomes

  1. Primary outcome: comparison of physical functioning score on SF36

    Time frame: enrolment, 6 weeks, 3,6 12 months

Secondary outcomes

  1. Secondary objectives are to compare the re-operation rate between operative and non-operative treatment and to compare the time to union, rates of nonunion and complications such as infection between the two groups.

    Number of participants with complications or adverse events that ae related to treatment

    Time frame: enrolment, 6 weeks, 3,6,12 months

07

Study locations

1 site
  • LOndon Health Sciences cEntre- Victoria Hospital
    LOndon, Ontario N6A 4G5, Canada
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Sep 7, 2016, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT00336752
Lead sponsor
London Health Sciences Centre Research Institute and Lawson Research Institute of St. Joseph's
Responsible party
David Sanders (Surgeon, London Health Sciences Centre Research Institute and Lawson Research Institute of St. Joseph's) — Principal investigator
First posted
Jun 14, 2006
Start date
Jun 2003
Primary completion
Aug 2010
Completion
Aug 2010
Last update
Sep 7, 2016

Study contacts

DR. David Sanders, M.D., FRCSC
principal investigator · Western University, Canada

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Sep 2016. You cannot join it, but the record below documents what was studied.

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