All Free. The maxilla (plural: maxillae /mækˈsɪliː/) in vertebrates is the upper fixed (not fixed in Neopterygii) bone of the jaw formed from the fusion of two maxillary bones. 5b. Mandible anatomy should be looked at in terms of movement, structure, and function. This is similar to the mandible (lower jaw), which is also a fusion of two mandibular bones at the mandibular symphysis. Maxillary definition, of or relating to a jaw, jawbone, or maxilla.  The two maxillary bones are fused at the intermaxillary suture, forming the anterior nasal spine. An irregularly shaped bone, supporting the superior teeth and taking part in the formation of the orbit, hard palate, and nasal cavity. maxilla - WordReference English dictionary, questions, discussion and forums. The body of the mandible anchors the lower teeth and forms the chin. It is thicker occipitally than rostrally and exhibits numerous depressions, the tooth sockets, in which the teeth are fixed. A maxilla fracture is often the result of facial trauma such as violence, falls or automobile accidents. Kids Definition of maxilla 1 : an upper jaw especially of a mammal 2 : either of the pair of mouth parts next behind the mandibles of an arthropod (as an insect or a crustacean) Mall states that the frontal process is developed from both centers. anatomy specialized us / mækˈsɪl.ə / uk / mækˈsɪl.ə / plural maxillae uk / mækˈsɪl.iː / the upper jaw bone that supports the upper teeth and forms part of the eye sockets and nasal cavity In humans, the upper jaw includes the hard palate in the front of the mouth. "maxillary" (general anatomy) definition: the jaw in vertebrates that is fused to the cranium. Irregularly shaped pneumatized bone, supporting superior teeth and taking part in formation of orbit, hard palate, and nasal cavity. The maxilla was formerly described as ossifying from six centers, viz. : At birth the transverse and antero-posterior diameters of the bone are each greater than the vertical. Maxilla fractures are classified according to the Le Fort classification. The maxillary sinus is one of the four paranasal sinuses, which are sinuses located near the nose. . FIG.157– Left maxilla.Outer surface. 1. Other articles where Maxillary sinus is discussed: human respiratory system: The nose: Correspondingly, they are called the maxillary sinus, which is the largest cavity; the frontal sinus; the ethmoid sinuses; and the sphenoid sinus, which is located in the upper posterior wall of the nasal cavity. Definition of maxilla noun in Oxford Advanced Learner's Dictionary. Part of bone that forms the dominant portion of the face, comp… Horizontal portion of the maxilla that holds the tooth roots Bony eminence over the maxillary canine root on the facial sur… 11 Terms It is an even assymetric bone, that gives implantation to the upper premolar and molar teeth and at its rostral extremity, to the canine tooth in the species in which it exists. One of the lower or outer jaws of arthropods. The sinuses have two principal functions: because they are filled with air, they help keep the… (a) The bone of either the upper or the under jaw. one of two identical bones that form the upper jaw. The maxillary bones, or maxillae are the largest facial bones and they form the upper jawbone and the central part of the facial skeleton (see Figure 1). Palatine. maxilla One of a pair of joined facial bones that form the upper jaw, the hard palate, part of the wall of the cavity of the nose and part of the floor of each eye socket. The frontal process is well-marked and the body of the bone consists of little more than the alveolar process, the teeth sockets reaching almost to the floor of the orbit. The maxilla is ossified in membrane. The size and shape of the tooth socket alveolus varies with the type of the tooth being enclosed. The maxillae bear the upper teeth and each contains a cavity called the maxillary antrum or sinus. The mandible is the movable part of the jaw. The maxillary sinus presents the appearance of a furrow on the lateral wall of the nose. Maxillæ (#). The maxillae form the upper jawbone and meet each other at a median intermaxillary suture. In most vertebrates, the foremost part of the upper jaw, to which the incisors are attached in mammals consists of a separate pair of bones, the premaxillae. All Free. ), n.; pl. See more. (in arthropods) that part of the mouthparts lying behind the jaws. The tooth socket for the canine toothis the deepest. Cartilaginous fish, such as sharks, also lack a true maxilla. This is similar to the mandible, which is also a fusion of two halves at the mandibular symphysis. The lower border of the maxilla supports the upper teeth. [L., dim. Maxilla definition, a jaw or jawbone, especially the upper. For arthropod maxillae, see. ‘Two major bones of the upper jaw, the maxilla, and the premaxilla, were previously firmly attached to the skull and had teeth.’ ‘The maxilla fuses with the vomer bone and the nasal septum.’ ‘It may also have had a role in giving some minor flexibility to the snout, as it tends to insert ventrally between the maxilla and premaxilla, and dorsally between the nasal and premaxilla.’ These fuse with the maxilla proper to form the bone found in humans, and some other mammals. , thesaurus, literature, geography, and function jaws of arthropods that the frontal process is developed from centers... B ) the bone of the facial mass a jaw, jawbone, or maxilla ''. 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