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An orbital blowout fracture is a traumatic deformity of the orbital floor or medial wall that typically results from the impact of a blunt object larger than the orbital aperture, or eye socket. [1] Most commonly this results in a herniation of orbital contents through the orbital fractures. [ 1 ]
The zygomaticomaxillary complex fracture, also known as a quadripod fracture, quadramalar fracture, and formerly referred to as a tripod fracture or trimalar fracture, has four components, three of which are directly related to connections between the zygoma and the face, and the fourth being the orbital floor.
Blowout fracture of the orbit is caused by blunt trauma, classically described for fist or ball injury, leading to fracture of the floor or medial wall of the orbit due to sudden increased pressure on the orbital contents. Muscular Entrapment Fracture of the orbital bones can lead to muscular entrapment limiting gaze in one direction.
Miami Dolphins defensive tackle Zach Sieler, declared out for Sunday's game vs. Arizona after being poked in the eye in practice Thursday, has a fractured orbital bone, NFL Network is reporting.
For example, fractures of the orbital floor or medial orbital wall of the eye can entrap the medial rectus or inferior rectus muscles. [29] In facial wounds, tear ducts and nerves of the face may be damaged. [3] Fractures of the frontal bone can interfere with the drainage of the frontal sinus and can cause sinusitis. [30]
Spallation forces arise as the blast wave displaces a dense medium across a less dense interface, and inertial forces may cause displacement of optical structures. Primary blast ocular trauma therefore comprises non-penetrating mechanical injuries such as hyphemas, ruptured globes, conjunctival hemorrhage, serous retinitis, and orbital fracture.
It is requested that an orbital mechanics diagram or diagrams be included in this article to improve its quality. Specific illustrations, plots or diagrams can be requested at the Graphic Lab . For more information, refer to discussion on this page and/or the listing at Wikipedia:Requested images .
Added orbital diagrams for molecular orbitals. 16:49, 21 May 2015: 2,020 × 1,070 (138 KB) Officer781: 2pz MO in wrong orientation relative to the other orbitals per the LCAO notation. 16:40, 21 May 2015: 2,020 × 1,070 (138 KB) Officer781: Moved 2s orbital higher in energy as that MO has more hydrogen admixture.