Maxillary bone anatomy. Maxilla Overview & Anatomy 2022-10-27

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The maxillary bone, also known as the maxilla, is a facial bone located in the upper jaw. It is a paired bone, with one located on the left and one on the right side of the face. The maxillary bone is an important structure in the human body as it helps to form the central portion of the face, as well as providing support for the teeth and the nasal cavity.

The maxillary bone is made up of several parts, including the body, the alveolar process, and the zygomatic process. The body of the maxillary bone forms the main part of the bone and is located between the alveolar process and the zygomatic process. The alveolar process is a ridge of bone that extends from the body of the maxillary bone and contains the sockets for the teeth. The zygomatic process is a projection of the maxillary bone that extends outward and articulates with the zygomatic bone, forming the cheekbone.

The maxillary bone also has several important landmarks and features. The infraorbital foramen is a hole located in the body of the maxillary bone that allows for the passage of the infraorbital nerve and artery. The infraorbital nerve is responsible for providing sensation to the lower eyelid, cheek, and upper lip, while the infraorbital artery supplies blood to these areas. The maxillary sinus is a large air-filled cavity located within the maxillary bone that helps to lighten the bone and allows for resonance in the voice. The maxillary sinus is also the site of a common infection known as sinusitis.

In addition to its structural and functional role in the face, the maxillary bone is also important for facial expression and aesthetics. The maxillary bone plays a key role in the shape and contour of the cheeks and upper lip, and variations in its shape and size can affect the appearance of the face.

Overall, the maxillary bone is a complex and important structure in the human body, playing a vital role in the structure and function of the face. Its various parts and landmarks serve a variety of functions, from supporting the teeth and nasal cavity to contributing to facial expression and aesthetics.

Maxilla

maxillary bone anatomy

The infraorbital foramen is located underneath the orbital ridge and serves as a pathway for the infraorbital nerve and vessels. Anteriorly on the palate, immediately posterior to the central incisors, is another opening called the incisive foramen or alternatively the nasopalatine foramen. This appendix will introduce the reader to the basics of anatomical terminology and will then describe the different regions and bones of the skeleton with an emphasis on those structures that have evolved dramatically in humans compared to our closest living relatives: chimpanzees. The maxilla bone is composed of a main body with four processes or projections. Internal anatomy The mandible has a large medullary core with a cortical rim 2-4 mm thick.

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Maxillary sinus: Anatomy and structure

maxillary bone anatomy

This could require assisted ventilation. Just below the infra-orbital foramen, there is another depressed area on the anterior surface of the body called the canine fossa. The maxilla articulates with the frontal, zygomatic, and palatine bones. The hard palate is the bony roof of the mouth, and is formed by the palatine processes of the maxillae and horizontal plates of the palatine bones. On the internal surface is a vertical groove for the external nasal artery. The lower portion of the maxilla is connected to the upper teeth through the alveolar process.

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Maxillary Sinus Anatomy, Function & Function

maxillary bone anatomy

The floor of the internal surface forms the floor of the anterior cranial fossa. Its anatomical position is just superior to the thyroid cartilage. The zygomaticofacial foramen is located just lateral to the lateral orbital rim at the junction of the frontal and maxillary processes. Extending anteriorly and inferiorly from the mandibular notch toward the inferior rim of the body is the mylohyoid groove, through which the mylohyoid nerve runs. It has no border with another facial bone.


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Maxilla bone, maxilla anatomy & maxilla function

maxillary bone anatomy

And while there is a degree to which nerves can heal on their own, there are limitations. So while all subdisciplines of anthropology study human behavior culture, language, etc. Body It is the largest part of the bone, having a roughly pyramidal shape and four surfaces: anterior, orbital, nasal, and infratemporal surfaces. They also contain the infraorbital foramen, an opening in the bone just below the eye sockets, and the maxillary sinus, which helps to protect important facial structures during an accidental trauma, like the crumple zone of a car. Last medically reviewed on February 21, 2018 Healthline has strict sourcing guidelines and relies on peer-reviewed studies, academic research institutions, and medical associations. Inferiorly, the alveolar process of the maxilla houses the teeth, including central incisors, lateral incisors, canines, 2 premolars, and 3 molars in adults.

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Maxilla: Bone Anatomy, Function, and Surgery Procedures

maxillary bone anatomy

Unfortunately, fractures in this area also often affect your ability to eat. In a Le Fort fracture, the hard palette separates from the upper maxilla via transverse fracture. The maxillary tuberosity or maxillary eminence has several small openings called alveolar foramina that lead into the alveolar canals. Suture between superior border of the frontal process and frontal bone To either side of the nasal cavity there are two much larger holes. Infraorbital rim and frontal process Superiorly, the maxillary bone is thickened in an inferior concavity that forms the infraorbital rim. Maxilla and the skull Figure 6.

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Maxillary Nerve: Anatomy, Location, and Function

maxillary bone anatomy

The superior ramus bifurcates into an anterior coronoid process and a posterior condylar process. Finally, the hard palate requires fusion at either side of the maxillary prominences with the fetal frontonasal prominence. Treatments for this condition include everything from pharmacological approaches to surgery. This process — not surprisingly — borders with the zygomatic bone at the zygomaticomaxillary suture. Bartelink, and Michael Finnegan, 301—312. Resetting the maxilla may require surgery. This concavity projects superiorly to form the frontal process that articulates with the frontal bone.

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Maxilla: Anatomy, function and clinical notes

maxillary bone anatomy

Laterally, the maxillae articulate with the zygomatic bones at the zygomatic processes. The two maxillary bones are fused at the intermaxillary suture, forming the anterior nasal spine. The alveolar process is an inferior extension of the maxilla with a rather porous structure. It houses the teeth, forms the roof of the oral cavity, forms the floor of and contributes to the lateral wall and roof of the nasal cavity, houses the maxillary sinus, and contributes to the inferior rim and floor of the orbit. Other facial and cranial bones that articulate with the same bones may also have similarly-named processes.

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Facial Bone Anatomy: Overview, Mandible, Maxilla (2023)

maxillary bone anatomy

The mandible houses the lower dentition, which in adults consists of 2 central and 2 lateral incisors, 2 canines, 2 first and 2 second premolars, and 3 sets of molars. Sinus congestion is common in this sinus as it drains into the middle meatus which is superior to the majority of the cavity. It also articulates with the upper teeth. Maxillary bone fractures with displacement can be life-threatening. The extent of injuries, type of surgery, and other medical complications determine how long you stay in the hospital after surgery. The hard palate separates the nasal cavity from the oral cavity.

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