Mandible: It is the largest, strongest, and only movable facial bone. This bone is known as the sphenoid bone located in front of the basilar part of the occipital bone. It articulates with the maxilla, palatine, and ethmoid bones. In the middle of the skull, unpaired bone of the neurocranium is present. The upper and lower jaws bear the sockets for the 32 32 permanent teeth. They are unpaired bones and can be located between the two orbits in the skull. These are irregular bones that include the cheek bones, nasal bones, temples, upper jaw bone (maxilla)) and lower jaw bones (mandible). The nasal cavity is separated from the brain through the ethmoid bone. Irregularly shaped, right and left halves of the maxilla fuse together, in the midline, this area is known as an intermaxillary suture (can be located below the nose). Note: The maxilla bone constructs the upper jaw of the skull. The neurovascular structures pass by the mental Foramen, which is located below the second premolar tooth on either side (present laterally to the mental protuberance). During developmental stages, a ridge-like structure develops due to the fusion of two halves of the mandibular known as Mandibular symphysis. 1 sphenoid bone: located behind the eye sockets stretches from one side of the cranium to the other sometimes not included in the list of facial bones as it is also part of the neurocranium articulates with the frontal, parietal, temporal, occipital, ethmoid, zygomatic, palatine, and vomer bones. The shape of the chin is formed by mental protuberance. Base –In the inferior area of the jaw and digastric muscle is attached to it. Alveolar process– superiorly located, lower teeth are held up by these 16 sockets. The structure of mandible bone is a curved shape depicting a horseshoe. With the help of the temporomandibular joint, it is connected to the temporal bone on either side of the skull. The mandible is the largest bone of the fascial skeleton (viscerocranium).Besides the bones of the middle ear, the mandible is the only mobile bone in the skull. The strongest and largest bone of the face is the mandible. Mandible bone constructs the lower jaw of the skull and acts as a collecting cabin for the lower teeth, mandible can be located beneath the maxilla. Out of Mandible, Maxilla, Ethmoid, and Sphenoid the only movable bone in the skull is Mandible. This explodes, or pulls apart, all the bones of the skull.Hint:It is a single bone forming a temporomandibular joint with the temporal bone and responsible for the chin shape. ⒊ Click the “Explode” button on the left of your screen. ⒉ Select “HEAD” in the breadcrumb trail at the top of your screen. You can use the Explode Tool in Complete Anatomy to see how the bones of the skull fit together like puzzle pieces. For example, the mental foramen allows the mental branch of the inferior alveolar artery, the mental vein and the mental nerve to pass through the mandible. The foramina allow blood vessels, nerves and other structures to pass through the bones. Within the bones of the skull are small openings called foramina. Mandible has a temporal mandibular joint, it is a type of synovial type joint. The facial skeleton is composed of dermal bone and derived from the neural crest cells (also responsible for the development of the neurocranium, teeth and adrenal medulla) or from the sclerotome, which derives from the somite block of the mesoderm. The mandible, or lower jaw bone, is the only bone in the skull that is movable via the temporomandibular joint. Skull is formed of 22 bones out of which, the mandible is the only movable bone. These are the mandible and vomer as well as the paired inferior nasal conchae, maxilla, zygomatic, lacrimal, nasal and palatine bones. The viscerocranium forms the facial skeleton and consists of 14 bones. These bones include the frontal, occipital, sphenoid and ethmoid bones as well as the paired temporal and parietal bones. The neurocranium consists of 8 bones and forms the cranial roof and base. The bones of the skull are divided into two groups: the neurocranium and the viscerocranium. The mandible is connected to the temporal bone by the temporomandibular joint. It is the only movable bone in the skull. This forms the lower jaw and holds the lower teeth in the right place. In humans, there are 22 bones that make up the skull. The mandible (lower jaw or jawbone) is the largest, strongest and lowest bone in the human facial skeleton. The skull acts as a protective case for the brain and supports the structure of the face.
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