Symphysis-Condyle Contrecoup — NDEB AFK MCQ

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ModerateOral SurgerySymphysis-Condyle ContrecoupNDEB AFK

Which type of mandibular fracture is most commonly associated with condylar fracture on the contralateral side (contrecoup injury)?

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Correct answer: E — Symphysis/parasymphysis fracture

Symphysis and parasymphysis fractures are commonly associated with contralateral condylar fractures (contrecoup mechanism). A blow to the chin transmits force through the mandible to the contralateral condyle (the thinnest and weakest part of the condyle), causing fracture. This association mandates bilateral condylar imaging (panoramic radiograph or CT) whenever a symphysis/parasymphysis fracture is diagnosed. Missing a condylar fracture can lead to malocclusion, growth disturbance (in children), and TMJ dysfunction.

Reference: Hupp – Contemporary Oral and Maxillofacial Surgery, 7th ed., 2019