What does premaxilla mean?
Definition of premaxilla : either of a pair of bones of the upper jaw of vertebrates between and in front of the maxillae.
What is the function of the premaxilla?
Lateral Surface of the Skull. The premaxilla carries the incisors, the roots of which extend far back into the bone all the way to the maxilla. The lateral edges of the nasal bone can be seen above the premaxilla and the zygomatic plate and anteorbital bar of the maxilla are obvious.
What is premaxilla in fish?
premaxilla (View picture) (English) One of the paired, superficial, usually toothed, dermal bones of the upper jaw, proximal or anterior to the maxillaries; in primitive Teleostomi they comprise the middle, in more advanced forms they may comprise the whole, of the oral edge of the upper jaw. Teeth may be present.
What causes maxillary hyperplasia?
It is often associated with Crouzon syndrome, Angelman syndrome in addition to fetal alcohol syndrome. It may also be associated with a cleft lip and cleft palate. Some people can also develop maxillary hypoplasia due to poor teeth extractions.
Where is the premaxilla located?
upper jaw
The premaxilla (or praemaxilla) is one of a pair of small cranial bones at the very tip of the upper jaw of many animals, usually, but not always, bearing teeth.
Where is premaxilla derived?
It is formed from the fusion of a pair of small cranial bones at the very tip of the jaws of many animals, usually bearing teeth, but not always. They are connected to the maxilla and the nasals.
What is Hyostylic jaw suspension?
hyostylic jaw suspension A type of jaw suspension seen in most fishes, in which the upper jaw is not directly connected to the cranium. The attachment between cranium and upper jaw is made by a ligament at the front end and by the hyomandibular (see hyoid arch) at the rear end (see illustration).
What is maxillary hyperplasia?
Maxillary hypoplasia, or maxillary deficiency, is an underdevelopment of the bones of the upper jaw. It is associated with Crouzon syndrome, Angelman syndrome, as well as fetal alcohol syndrome. It can also be associated with cleft lip and cleft palate.
What is premaxillary triangle?
From the coronal view of the face, the transducer is tilted to obtain the 2 angulated nasal bones, forming an inverted V shape. The V is completed into a triangle by imaging the premaxillary bone, which forms the base of the V. We have named this triangle the PMT.