Where is lamina papyracea located?
ethmoid bone
The orbital lamina of ethmoid bone, (or lamina papyracea or orbital lamina) is a smooth, oblong bone plate which forms the lateral surface of the labyrinth of the ethmoid bone in the skull. The plate covers in the middle and posterior ethmoidal cells and forms a large part of the medial wall of the orbit.
What is right lamina papyracea fracture?
Blow-out fractures occur when a blow to the eye increases pressure in the orbit, causing the weak floor or medial wall (lamina papyracea) to “blow out” into the maxillary sinus or ethmoid bone. [3, 4, 5, 6, 7, 8, 9] This results in a fracture, though it often prevents globe rupture and loss of the eye.
Which anatomical structures are present on the ethmoid bone?
Structure. The ethmoid bone is an anterior cranial bone located between the eyes. It contributes to the medial wall of the orbit, the nasal cavity, and the nasal septum. The ethmoid has three parts: cribriform plate, ethmoidal labyrinth, and perpendicular plate.
What is treatment for orbital fracture?
How Are Orbital Fractures Treated? For many orbital fractures, surgery is not necessary. Your ophthalmologist may recommend the use of ice packs to reduce swelling, along with decongestants and antibiotics.
What causes the orbital rim to rupture in a blowout fracture?
Blowout fractures result from trauma to the orbital bones. When an object hits the orbital bones (usually the eye brow and upper cheek bone) the force is transmitted to the bones. If the force is great enough, the bones buckle and break. Any large object with force or speed can cause a blowout fracture.
What is sphenoid bone?
The sphenoid is just one of the twenty-two bones that form the skull and essentially helps to connect the neurocranium to the facial skeleton. It is a single bone in the midline of the cranial cavity situated posterior to the frontal bone but anterior to the occipital.
Is the sphenoid bone paired?
The sphenoid bone is an unpaired bone of the neurocranium. It is situated in the middle of the skull towards the front, in front of the basilar part of the occipital bone.
What is the function of the sphenoid bone?
Structure and Function Sphenoid bone has many essential functions. It helps form the base and lateral sides of the skull in combination with the orbital floor. Its many articulations with other bones give the skull rigidity. It is an attachment site for many of the muscles of mastication.
What is the lamlamina papyracea?
lamina papyracea. A thin, smooth plate of bone on the lateral surface of the ethmoid bone; it forms part of the orbital plate. See also: lamina. Synonym for the orbital plate of the ethmoid bone, which forms part of the medial wall of the orbit.
What type of bone islamina papyracea?
lamina papyracea A thin, smooth plate of bone on the lateral surface of the ethmoid bone; it forms part of the orbital plate.
Which bony structure allows attachment to the lamina papyracea?
The bony structure that allows attachment to the lamina papyracea is called the basal lamella. Bony erosion of the anterior cribriform plate and left lamina papyracea was also noted on review of the films.
Which radiologic findings are characteristic of lamina papyracea (pigmentation)?
Fracture of the lamina papyracea is usually best demonstrated on CT. 6,16,17) The most common radiologic finding on CT was bony defect of lamina papyracea and/or medial superior orbital rim.