
Mechanism of Injury
- Direct blow: Rare, can cause avulsion or crush injuries.
- Indirect forces: Due to fall from height, sports-related injuries or due to RTA.
- Group A: Extra-articular fracture.
- Group B: Involvement of the talonavicular joint.
- Group C: Involvement of both talonavicular and talocuneiform joints.
Clinical Features
- The patient complains of pain, swelling, and limp.
- Tenderness can be elicited over the navicular bone.
AP and lateral X-rays of the joint and CT scan give more reliable information about the fracture pattern.
Treatment
- Nonoperative treatment: This is indicated in undisplaced fractures and in fracture with less than 2 mm displacement of the talonavicular joint. The treatment consists of short leg NWB cast for 6-8 weeks.
- Operative treatment: This is reserved for displaced fractures with > 2 mm separation. Fixation can be achieved most of the times by screw fixation alone. If more than 40 percent of the articular surface is damaged, talonavicular fusion should be considered.
- Nonunion
- Avascular necrosis
- Collapse of the arch
- Post-traumatic osteoarthritis
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