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Updated: Feb 5, 2026

A Mouse Model of Ankle-Subtalar Complex Joint Instability
Published on: October 28, 2022
Isolated Subtalar Arthrodesis
Paulo N Ferrao1, Nikiforos P Saragas1, Andrew Strydom1
1Linksfield Medical Centre, Johannesburg, South Africa.
Introduction:
An isolated subtalar arthrodesis through a sinus tarsi approach with cannulated screw fixation is safe, reproducible, and effective for specific hindfoot pathology in adults.
Step 1 Preoperative Planning:
Perform a comprehensive clinical and radiographic assessment.
Step 2 Patient Positioning:
Position the patient supine on the operating table with a bump under the ipsilateral hip, to internally rotate the involved leg.
Step 3 Incision:
Mark a longitudinal incision from just inferior to the tip of the lateral malleolus and extending toward the base of the 4th metatarsal.
Step 4 Approach:
Expose the subtalar joint by reflecting the extensor digitorum brevis and protecting the peroneal tendons.
Step 5 Joint Preparation:
Meticulously prepare the subtalar joint using osteotomes and curets down to healthy bleeding subchondral bone.
Step 6 Reduction And Fixation:
Reduce the subtalar joint into 5° of valgus and fix it with cannulated screws.
Step 7 Wound Closure:
Meticulously close the wound in layers and place the lower leg in a well-padded plaster back slab with the ankle in a neutral position.
Step 8 Postoperative Care:
The operatively treated leg is kept immobilized and non-weight-bearing for the first 6 weeks.
Results:
Numerous retrospective articles have reported high fusion rates and good functional outcomes after isolated subtalar arthrodesis, for all indications.
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