Questions and Answers
What are nasal bones?
Small bones making up superior nasal surface, point of attachment for nasal cartilages.
Nasal bone articulates with which bones?
Frontal bones superiorly, maxillae laterally, and perpendicular plate of the ethmoid bone.
Which 9 bones do the maxillae articulate with?
Frontal and ethmoid bones of cranium, nasal, lacrimal, zygomatic, palatine, vomer, inferior nasal concha, and the maxilla of the opposite side.
What is the composition of the maxillae?
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What does the zygomatic process of the maxillae form?
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What is housed by the alveolar process of the maxillae?
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What do the palatine processes of the maxillae form?
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What does the frontal process of the maxillae connect with?
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What does the superior surface of the maxillae form?
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What is contained in the body of the maxillae?
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What forms the nasal crest with nasal spine?
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Where is the palatine bone located?
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What structures does the palatine bone form?
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What does the horizontal plate of the palatine bone form?
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Which bones form the roof of the mouth?
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Where does the soft palate continue off?
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With which bones does the palatine bone connect?
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How does the palatine bone turn?
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Which bones form the floor of the nasal cavity?
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What is the inferior nasal concha?
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How are nasal concha connected?
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What forms the superior and middle concha?
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What is the vomer?
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What is the nasal septum formed by?
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What is the lacrimal bone?
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What does the zygomatic bone form?
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What are the zygomatic processes?
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With which bones does the zygomatic bone articulate?
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Study Notes
Nasal Bone
- Comprises small bones forming the superior nasal surface.
- Serves as an attachment point for nasal cartilages.
- Articulates with frontal bones superiorly, maxillae laterally, and the perpendicular plate of the ethmoid bone.
Maxillae
- Articulates with nine bones: frontal and ethmoid (cranium), nasal, lacrimal, zygomatic, palatine, vomer, inferior nasal concha, and the opposite maxilla.
- Made up of a body and four processes: zygomatic, frontal, alveolar, and palatine.
- Superior surface forms a major portion of the orbital floor.
- Contains an infraorbital margin extending from the frontal to zygomatic process.
- Alveolar process houses the teeth.
- Palatine process forms three-quarters of the roof of the anterior oral cavity and the floor of the nasal cavity.
- Frontal process connects with the frontal bone to form the lateral wall of the nasal cavity.
- Nasal crest with nasal spine is a medial ridge from both palatine processes.
Palatine Bone
- Located behind the maxilla.
- Forms the posterior nasal cavity, posterior roof of the oral cavity, and floor of the orbit.
- Horizontal plate creates the posterior hard palate, continuous with the palatine process of the maxilla.
- Connects with sphenoid, ethmoid, inferior nasal concha, and vomer.
- Turns upward laterally to form a perpendicular plate, contributing to the posterolateral wall of the nasal cavity.
Nasal Cavity and Concha
- Maxilla and palatine form the floor of the nasal cavity.
- Inferior nasal concha comprises tiny, scroll-like bones making up the inferior lateral walls of the nasal cavity.
- Nasal concha connects anteriorly to the maxilla, posteriorly to the palatine, and superiorly to the ethmoid.
- Superior and middle conchae are formed by the ethmoid bone.
- Vomer is an unpaired midline bone forming the inferior and posterior nasal septum.
Septum
- The nasal septum, which separates the right and left nasal cavities, consists of nasal cartilage, ethmoid bone, and vomer.
Lacrimal Bone
- The smallest facial bone, part of the medial wall of the orbit.
Zygomatic Bone
- Forms the zygomatic arch (cheekbone) and features a roughly four-sided body with four processes.
- Zygomatic processes include:
- Temporal process connecting to the temporal bone.
- Maxillary process connecting to the maxilla.
- Frontal sphenoid connecting with the frontal and sphenoid bones.
- Orbital process/surface.
- Articulates with frontal, sphenoid, maxilla, and temporal bones, serving as sites for important muscle attachments.
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