Frontal Bone and Sinus Anatomy Quiz

The thickened bone that bridges the zygomaticofrontal sutures to form the superior horizontal buttress of the facial skeleton. It provides structure and strength to the supraciliary and glabellar areas.

The thin bone that forms the roof of the eye socket.

An epithelial-lined cavity within the frontal bone.

The front part of the frontal sinus, which outlines the brow, glabella, and lower forehead.

The back part of the frontal sinus, which forms part of the anterior cranial vault.

The floor of the frontal sinus, which corresponds to the medial orbital roof.

A thin wall that often divides the frontal sinus into two asymmetric sinuses.

Paired air cells lined with respiratory epithelium that separate the nasal cavity from the orbits.

A fracture involving both the anterior wall and the supraorbital rim or nasofrontal ethmoid (NOE) area, particularly if it affects the drainage orifices of the frontal sinus.

This procedure removes the sinus cavity, often done after a fracture that damages the drainage system.

The removal of the posterior wall of the frontal sinus, creating a new space that becomes part of the cranial cavity.

A fracture that extends to the anterior and posterior walls of the frontal sinus, often involving fragmentation and displacement of bone.

A procedure that involves repairing the sinus walls and adding stents to keep the drainage orifices open.

This procedure involves using a flap of pericranium to cover the frontal sinus openings and strengthen the dura.

When cerebrospinal fluid (CSF) leaks into the frontal sinus, it indicates a potential dural tear that needs repair.

A subcranial approach involves operating from below the skull, often used for complex skull base injuries.

The roof of the ethmoid sinus, located directly above the cribriform plate.

A thin, perforated bone plate that separates the nasal cavity from the brain.

Structures responsible for processing olfactory information, located just above the cribriform plate.

A type of skull fracture that involves the frontal bone, forehead, and possibly the frontal sinus.

A complex fracture that extends beyond the frontal sinus and into the cribriform plate, potentially affecting brain structures.

A series of interconnected air-filled spaces within the ethmoid bone.

The space within the ethmoid bone where the ethmoid air cells drain into the nasal cavity.

The opening through which the frontal sinus drains into the nasal cavity.

A surgical procedure that involves removing the anterior table of the frontal sinus to expose deeper structures.

A surgical approach that involves making an incision along the hairline to expose the frontal bone and sinus.

A surgical technique that uses small incisions and endoscopic instruments to repair frontal sinus fractures.

A surgical approach that involves removing the posterior table of the frontal sinus to access the cranial cavity.

Bones that form the medial wall of the orbital cavity.

Fractures involving the nasal bones, orbit, and ethmoid bone.

A type of implant used to replace damaged bone, often used in frontal sinus fracture repair.

The outward appearance of a frontal bone fracture may not reflect the actual severity of the injury. Swelling can disguise underlying depressions.

Early surgical repair of frontal bone fractures is preferred to complex delayed reconstructions, which often require bone grafting.

A slightly depressed fracture of the anterior table may not require immediate repair and might heal well with a delayed bone graft.

The frontal sinus orifice is large enough to prevent drainage problems in the acute phase of an injury. However, it is crucial to consider the risk of infection.

Fractures involving the floor of the frontal sinus, which houses the drainage orifices, increase the risk of infection.

Posterior table fractures without displacement may not require surgery unless signs of intracranial complications are present.

Endoscopic examination can help determine if open repair is necessary for borderline cases, especially when evaluating sinus orifices and the posterior table.

Pneumocephalus, air in the skull, can occur near posterior table fractures but often resolves without surgery unless it persists.

A cerebrospinal fluid leak through the frontal sinus is rare without other indicators for surgery.

Fractures of the cribriform plate, which connects the brain to the nose, can lead to significant cerebrospinal fluid leaks, even with minimal displacement.

Maxillofacial injuries should be addressed after the frontal bar is properly aligned.

Obliteration of the frontal sinus, a surgical procedure, involves removing sinus lining and replacing it with bone or fat to prevent future infections.

Transnasal endoscopic sinus surgery, a minimally invasive approach, offers a promising alternative for treating frontal sinus disorders when the posterior table is intact.

Depressed fractures of the anterior table that are cleaned of debris can be managed without worrying about drainage issues.

The appropriate management of frontal sinus fractures hinges on careful assessment of the extent of injury, especially the involvement of the sinus floor and posterior table.