The ethmoid fracture can produce bone fragments that penetrate the cribriform plate.

A basilar skull fracture ( or basal skull fracture ) is a fracture of the base of the skull, typically involving the temporal bone, occipital bone, sphenoid bone, and / or ethmoid bone.

Orbital cellulitis can complicate acute ethmoiditis if anterior and posterior ethmoidal veins thrombophlebitis enables the spread of the infection to the lateral or orbital side of the ethmoid labyrinth.

The coelacanth also contains a unique rostral organ within the ethmoid region of the braincase.

His description of the lacrimal ducts in the eye was a marked advance on those of his predecessors and he also gave a detailed account of the ethmoid bone and its cells in the nose.

He gave the first distinct account of the true configuration of the sphenoid and the ethmoid bone, and has the merit of first describing ( 1546 ) the third ear bone, the tympanum, called stapes, though this distinction is also claimed by Eustachius and Fallopius.

The nasal septum also is supplied with blood by the sphenopalatine artery, and by the anterior and posterior ethmoid arteries, with the additional circulatory contributions of the superior labial artery and of the greater palatine artery.

The internal roof of the nose is composed by the horizontal, perforated cribriform plate ( of the ethmoid bone ) through which pass sensory filaments of the olfactory nerve ( Cranial nerve I ); finally, below and behind ( posteroinferior ) the cribriform plate, sloping down at an angle, is the bony face of the sphenoid sinus.

The olfactory bulb is supported and protected by the cribriform plate of the ethmoid bone, which in mammals separates it from the olfactory epithelium, and which is perforated by olfactory nerve axons.

* Greater petrosal nerve-provides parasympathetic innervation to lacrimal gland, sphenoid sinus, frontal sinus, maxillary sinus, ethmoid sinus, nasal cavity, as well as special sensory taste fibers to the palate via the Vidian nerve.

* The maxillary nerve ( V < sub > 2 </ sub >) carries sensory information from the lower eyelid and cheek, the nares and upper lip, the upper teeth and gums, the nasal mucosa, the palate and roof of the pharynx, the maxillary, ethmoid and sphenoid sinuses, and parts of the meninges.

* Anterior ethmoid nerve — conveys sensation in the anterior ( front ) half of the nasal cavity: ( a ) the internal areas of the ethmoid sinus and the frontal sinus ; and ( b ) the external areas, from the nasal tip to the rhinion: the anterior tip of the terminal end of the nasal-bone suture.

* Posterior ethmoid nerve — serves the superior ( upper ) half of the nasal cavity, the sphenoids, and the ethmoids.

The location of the primary lesion may be suggested by the location of the abscess: infections of the middle ear result in lesions in the middle and posterior cranial fossae ; congenital heart disease with right-to-left shunts often result in abscesses in the distribution of the middle cerebral artery ; and infection of the frontal and ethmoid sinuses usually results in collection in the subdural sinuses.

Examples include the ethmoid and sphenoid bones.

* the ethmoid sinuses, which are formed from several discrete air cells within the ethmoid bone between the nose and the eyes.

There are several paired paranasal sinuses, including the frontal, ethmoid, maxillary and sphenoid sinuses.

The ethmoid sinuses is further subdivided into anterior and posterior ethmoid sinuses, the division of which is defined as the basal lamella of the middle turbinate.

File: Ethmoidinfection. png | A computed tomograph showing infection of the ethmoid sinus

The rostral organ of the coelacanth is contained within the ethmoid region of the braincase.

** the ethmoid sinuses, which are formed from several discrete air cells within the ethmoid bone between the nose and the eyes.

The upper jaw's protrusion is achieved in a unique way: the maxilla, instead of being ligamentously attached to the ethmoid and palatine, slides in and out with the highly protractile premaxilla.

In the early twentieth century, Freer, in 1902, and Killian, in 1904, respectively pioneered the submucous resection septoplasty ( SMR ) procedure for correcting a deviated septum ; they raised mucoperichondrial tissue flaps, and resected the cartilaginous and bony septum ( including the vomer bone and the perpendicular plate of the ethmoid bone ), maintaining septal support with a 1. 0-cm margin at the dorsum and a 1. 0-cm margin at the caudad, for which innovations the technique became the foundational, standard septoplastic procedure.

The principal arterial blood-vessel supply to the nose is two-fold: ( i ) branches from the internal carotid artery, the branch of the anterior ethmoid artery, the branch of the posterior ethmoid artery, which derive from the ophthalmic artery ; ( ii ) branches from the external carotid artery, the sphenopalatine artery, the greater palatine artery, the superior labial artery, and the angular artery.

For this last case, the cohesive fracture can be said to be “ cohesive near the interface ”.

Mixed fracture surfaces can be characterised by a certain percentage of adhesive and cohesive areas.

For most adhesive joints, this can be achieved using fracture mechanics.

( Small imperfections in the ceramic material with its low fracture toughness lead to cracks, which can lead to potentially dangerous equipment failure.

Risk factors for osteoporotic fracture can be split between nonmodifiable and ( potentially ) modifiable.

Vertebral height measurements can objectively be made using plain-film x-rays by using several methods such as height loss together with area reduction, particularly when looking at vertical deformity in T4-L4, or by determining a spinal fracture index that takes into account the number of vertebrae involved.

In the center of the image on the right, the new landslide, a bright, flow-like area, can be seen extending to the left of a bright fracture.

Symptoms of skull fracture can include:

* leaking cerebrospinal fluid ( a clear fluid drainage from nose, mouth or ear ) may be and is strongly indicative of basilar skull fracture and the tearing of sheaths surrounding the brain, which can lead to secondary brain infection.

* visible deformity or depression in the head or face ; for example a sunken eye can indicate a maxillar fracture

While a flow can shrink in the vertical dimension without fracturing, it can't easily accommodate shrinking in the horizontal direction unless cracks form ; the extensive fracture network that develops results in the formation of columns.

Additionally, some magnets are brittle and can fracture at high temperatures.

This fact is very important clinically as a fracture of the bone at the shaft of the bone here can cause lesions or even transections in the nerve.

When a product fails for no obvious reason, SEM and Energy-dispersive X &# 8209 ; ray spectroscopy ( EDX ) performed in the microscope can reveal the presence of aggressive chemicals that have left traces on the fracture or adjacent surfaces.

Both of these mechanical properties are aspects of plasticity, the extent to which a solid material can be plastically deformed without fracture.

Episodes of delirium can be prevented by identifying hospitalized people at risk of the condition: those over 65, those with a known cognitive impairment, those with hip fracture, those with severe illness.

* A brittle or fragile item can fracture.

Bruising to the abdomen is highly likely and more serious injuries can occur, including fracture of the xiphoid process or ribs.

Tetanic spasms can occur in a distinctive form called opisthotonos and be sufficiently severe to fracture long bones.

Wooden furniture can shrink, causing the paint that covers these surfaces to fracture.

A fracture of the humerus in this region can result in radial nerve injury.

As with all surface mount devices, bending, due to a difference in coefficient of thermal expansion between PCB substrate and BGA ( thermal stress ), or flexing and vibration ( mechanical stress ) can cause the solder joints to fracture.

Isotopes are often preferentially absorbed by biologically active tissue in the body, and can be used to identify tumors or fracture points in bone.

The process of the entire regeneration of the bone can depend on the angle of dislocation or fracture.

There are three major phases of fracture healing, two of which can be further sub-divided to make a total of five phases ;