INBDE (Integrated National Board Dental Examination) Practice Exam

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What kind of fracture involves bleeding under the conjunctiva from a direct blow to the molar eminence?

  1. LeFort I

  2. Compound fracture

  3. Zygomaticomaxillary complex fracture

  4. Simple fracture

The correct answer is: Zygomaticomaxillary complex fracture

A LeFort I fracture usually involves a break in the upper jaw surrounding the nose, and would not typically cause bleeding under the conjunctiva. A compound fracture involves a break in the skin or mucous membrane near the site of the fracture, and would not necessarily involve bleeding under the conjunctiva. A simple fracture would not typically involve bleeding under the conjunctiva unless there was another injury or factor involved. The correct answer, a zygomaticomaxillary complex fracture, involves a break in the midface, including the zygomatic bone and the maxillary sinus, which are located near the molar eminence. This type of fracture can cause bleeding under the conjunctiva due to the close proximity to the eye.

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