After trauma with malocclusion and hematoma on the floor of the mouth, which fracture is most likely?

After trauma with malocclusion and hematoma on the floor of the mouth, which fracture is most likely?

• A. Zygomatic Fracture
• B. TMJ Dislocation
• C. Mandibular Fracture
• D. Maxillary Fracture

Answer: (C)

Trauma with malocclusion points directly to damage to the mandible. The teeth and bite are controlled by the mandible, so a fracture in this bone readily disrupts how the teeth come together, causing malocclusion. Bleeding into the floor of the mouth fits with a mandibular fracture because the fracture lines and mucosal injuries can bleed into the sublingual space beneath the tongue. Other injuries in this area—like zygomatic or maxillary fractures—affect the midface and facial contours but don’t typically produce a floor-of-mouth hematoma or the same direct disruption of occlusion. TMJ dislocation can also cause malocclusion, but it’s less likely to present with a hematoma under the tongue. So the combination described most strongly indicates a mandibular fracture.

Trauma with malocclusion points directly to damage to the mandible. The teeth and bite are controlled by the mandible, so a fracture in this bone readily disrupts how the teeth come together, causing malocclusion. Bleeding into the floor of the mouth fits with a mandibular fracture because the fracture lines and mucosal injuries can bleed into the sublingual space beneath the tongue. Other injuries in this area—like zygomatic or maxillary fractures—affect the midface and facial contours but don’t typically produce a floor-of-mouth hematoma or the same direct disruption of occlusion. TMJ dislocation can also cause malocclusion, but it’s less likely to present with a hematoma under the tongue. So the combination described most strongly indicates a mandibular fracture.