Mandibular Fracture Classification — NDEB AFK MCQ
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Correct answer: B — Kazanjian and Converse (favourable/unfavourable based on muscle pull direction)
While not the only classification, the Kazanjian and Converse system categorises mandibular fractures as favourable or unfavourable based on the direction of the fracture line relative to the pull of the muscles of mastication. A favourable fracture has the muscle forces pushing the fragments together (resisting displacement); an unfavourable fracture has forces pulling fragments apart (promoting displacement). Additionally, the presence of teeth in the fracture line influences treatment — teeth in the line may serve as anchor points for fixation or may need extraction if they impede reduction or are sources of infection.
Reference: Hupp – Contemporary Oral and Maxillofacial Surgery, 7th ed., 2019