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Mortise views

 

- Evaluate for:
- lateral talar shift:
- medial clear space
- deltoid injury
- fibular shortening;
- talocrural angle
- tibiofibular line
- fibular rotation, or lateral displacement;
- tibiofibular line
- syndesmotic integrity (see radiographs)
- talar tilt: (stability)
- osteochondral lesions of talus

- Discussion:
- fibular length, talar tilt, talar shift, talocrural angle, medial clear space, tibiofibular overlap, & tibiofibular clear space (interosseous clear space) can be measured can be measured;
- mortise views as ankle is moved from plantar to dorsiflexion may show these lesions more clearly;
- restoration of ankle mortise requires anatomic reduction of lateral malleolus so that is articular surface is congruous w/ reduced talus;

- Technique:
- obtained w/ the leg internally rotated 15 to 20 deg so that x-ray beam is nearly perpendicular to the intermalleolar line.