What part of the orbit is susceptible to blunt trauma?

What part of the orbit is susceptible to blunt trauma?

The medial wall comprises the frontal process of the maxilla, the lacrimal bone, the orbital plate of the ethmoid bone, and the sphenoid body. The area damaged most easily by trauma is the very thin lamina papyracea (0.2–0.4 mm thick), which separates the orbit from the ethmoidal sinuses.

What is the most common location for orbital fractures?

Anatomy and Mechanism of injury. Blowout fractures of the orbit most frequently affect the middle third of the orbit where the orbital walls are the thinnest. Inferior blowout fractures involving the floor of the orbit (maxillary sinus roof) are the most common followed by medial wall blowout fractures.

When there is trauma to the orbit the commonest site of fracture is?

Epidemiology. The blowout fracture is the most common type of orbital fracture and is usually the result of trauma.

What part of the bony orbit does a blowout fracture affect?

Indirect orbital floor fracture (“blowout fracture”) — This occurs when the bony rim of the eye remains intact, but the paper thin floor of the eye socket cracks or ruptures. This can cause a small hole in the floor of the eye socket that can trap parts of the eye muscles and surrounding structures.

Which bones potentially could be involved in a fracture of the orbit?

Any or all of the orbital bones (eg, ethmoid, frontal, palatine, maxilla) may be involved in trauma, and fractures vary in their displacement and comminution.

What is orbital bone fracture?

An orbital fracture occurs when one or more of the bones around the eyeball break, often caused by a hard blow to the face. To diagnose a fracture, ophthalmologists examine the eye and surrounding area. X-ray and computed tomography scans may also be taken.

Why is the orbit vulnerable to fracture from anterolateral blunt trauma?

Anatomical consideration. Lateral orbital wall is formed anteriorly by zygomatic bone which manifests itself a prominent anatomic position in the mid face. As such it makes it highly susceptible to external traumas.

Which bones could be involved in a fracture of the orbit?

Any or all of the orbital bones (eg, ethmoid, frontal, palatine, maxilla) may be involved in trauma, and fractures vary in their displacement and comminution. Assessing injury to the soft tissues and globe, as well as orbital and periorbital bone injury, is important.

Which wall of the orbit is most prone to fracture?

Most commonly the inferior orbital wall i.e. the floor is likely to collapse, because the bones of the roof and lateral walls are robust. Although the bone forming the medial wall is thinnest, it is buttressed by the bone separating the ethmoidal air cells….Orbital blowout fracture.

Blowout fracture
Specialty	Oral & Maxillofacial Surgery

How common is orbital fracture?

Fractures of the orbital floor are common: it is estimated that about 10\% of all facial fractures are isolated orbital wall fractures (the majority of these being the orbital floor), and that 30-40\% of all facial fractures involve the orbit. The anatomy of the orbital floor predisposes it to fracture.

What is a blowout fracture of the orbit?

A blowout fracture is a break of one or more of the bones that surround the eye. When an object strikes the eye, the force is transmitted into the eye compartment (orbit) [see figure 1], and the thinnest bones within the orbit will buckle or break from the force of the trauma.

What are orbital fractures?

What is an orbital fracture?

An orbital fracture is when there is a break in one of the bones surrounding the eyeball (called the orbit, or eye socket). Usually this kind of injury is caused by blunt force trauma, when something hits the eye very hard. Orbital Fracture Types. Any of the bones surrounding the eye can be fractured, or broken.

What is the most commonly fractured wall of the orbit?

The most commonly fractured wall of the orbit is the medial orbital floor. Laterally, the relatively thick zygomatic bone is separated from the thin maxillary and palatine bones by the inferior orbital fissure carrying the neurovascular bundle of the infraorbital nerve and artery ( Figure 4 ).

What causes enophthalmos in orbital fractures?

These include medial rectus muscle entrapment and significant defects of the medial wall, which can result in enophthalmos, especially when associated with large orbital floor fractures or loss of bone support at the junction of the orbital floor and medial wall in the anterior orbit (Fig. 4).

What are the possible complications of orbital wall fractures of the rectus?

Medial wall fractures of the orbit have the potential risk of medial rectus entrapment and enophthalmos. The risk of enophthalmos, though, is not necessarily the same as with similarly sized orbital floor fractures.