What is lamina papyracea?
The lamina papyracea (LP) is the weakest point of the medial wall of the orbit, which forms a connecting line between paranasal sinuses and the orbit. Also, the ethmoidal foramina along the LP are life-saving anatomical landmarks and allow transverse passage of the ethmoidal arteries into ethmoidal cells.
Where is lamina papyracea found?
the ethmoid bone
The lamina papyracea, also known as the orbital lamina of the ethmoid bone, is the principal component of the medial wall of the orbit, and also the lateral surface of the ethmoid air cells.
Is lamina papyracea part of orbital floor?
The weakest portion of the orbit consists of the thin orbital floor (maxilla) and the lamina papyracea (ethmoid bone) medially and inferiorly.
Can an orbital fracture heal on its own?
Some orbital wall fractures heal on their own, while others require surgery. Your doctor will discuss which treatment is right for you. Two types of surgery are used for orbital wall fractures: Traditional surgery, which requires an open incision.
How long does it take for an orbital fracture to heal?
Conclusions: Orbital floor strength is regained 24 days after repair. The authors now let patients resume normal activities approximately 3 weeks after uncomplicated orbital floor fracture repair. This is one of many clinical factors in assessing the return to normal activities.
What does lamina Orbitalis of ethmoid bone form?
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.
How serious is an orbital fracture?
These fractures may be asymptomatic and can be observed or cause problems with double vision, or a change in the position of the eyeball, and require surgical repair.
How do they fix a broken orbital bone?
The repair of orbital fractures involves fracture site exposure, freeing tissue prolapsed into the fracture site, and reapproximating the orbital wall support, usually with an implant.
Where is cribriform plate located?
The cribriform plate (less commonly also called the lamina cribrosa of the ethmoid bone) is a sieve-like structure between the anterior cranial fossa and the nasal cavity. It is a part of ethmoid bone and supports the olfactory bulb, which lies in the olfactory fossa.
What is the lamina papyracea?
The lamina papyracea is a thin layer of the ethmoid bone that comprises the medial orbital wall. It is best evaluated in the coronal and axial planes.
Does the lamina papyracea show up on a CT scan?
151 cence of the lamina papyracea was an incidental finding in six patients. In five cases the CT scan was carried out for symptoms suggesting chronic sinusitis. In the remaining subject, CT was done to study the local extension of a tumor in the controlateral nasal fossa.
Where is the anterior limit of the lamina papyracea?
The anterior limit is part of the lamina papyracea beyond the zone of dehiscence which is depressed medially (arrow). B, Coronal CT scan showing orbital fat (star) partially filling the ethmoid bulla. The asterisk shows the uninvolved lower part of the ethmoid bulla. Fig.
What is the pathophysiology of dehiscence of the lamina papyracea?
In all six patients dehiscence of the lamina papyracea was characterized by the same fea tures on axial and coronal scans: protrusion of fatty material into the bulla cells through a gap in the right or left lamina papyracea. This fatty mass was always of the same density as, and in continuity with, the orbital fat.