Questions and Answers
What is the process that aids in the enlargement of the nasal cavity and increases the height of the maxilla?
What is the purpose of Meckel's cartilages in the development of the mandible?
Where does the mandibular nerve divide into the lingual and inferior alveolar nerve?
What is the function of the alveolar process?
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What is the result of bone resorption at the floor of the nasal cavity?
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What is the purpose of bone deposition on the oral surface of the palate?
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At which week of intrauterine life does the prevomerine center begin to form?
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What is the function of the prevomerine center?
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What type of growth continues till 10 years of age?
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What is the direction of the sutures that the maxilla articulates with other bones of the skull?
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What is the role of the accessory cartilaginous center?
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What adds to the height of the maxilla?
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What is the main factor for the growth of the maxilla?
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How does the maxillary sinus expand?
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What type of ossification occurs in the maxilla proper?
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Which of the following is NOT a direction of ossification in the maxilla proper?
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How many centers of ossification are present in the premaxilla?
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What is the name of the bony trough that carries the infraorbital nerve?
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What is the name of the process that forms the outer alveolar plate for the maxillary tooth germs?
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What is the location of the first center of ossification in the maxilla proper?
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What is the name of the part of the premaxilla that forms the inner wall of the alveoli?
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At what week of intrauterine development does the palato-facial center of the premaxilla appear?
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Study Notes
Development of the Maxilla
- Begins at around 8-9 weeks of intrauterine life along the outer alveolar wall
- Situated beneath the anterior part of the vomer bone, forming the part that lies mesial to the nasal paraseptal cartilage
- Union between the maxilla and premaxilla occurs at 8 weeks of intrauterine life
Accessory Cartilages
- Appears in the region of the future zygomatic process and undergoes rapid ossification
- Small areas of secondary cartilaginous centers appear along the growing margin of the alveolar plate
- Appears in the midline of the developing hard palate between the two palatine processes
Growth of the Maxilla
- Sutural growth: continues till 10 years of age, then becomes less significant
- Maxilla articulates with other bones of the skull by 4 main sutures: fronto-maxillary, zygomatico-maxillary, zygomaticotemporal, and pterygopalatine sutures
- All these sutures are parallel to each other, directed from upward anteriorly to downward posteriorly
- Growth at these sutures will shift the maxilla forward and downward
Alveolar Process Development
- Adds to the height of the maxilla
- Eruption of teeth, especially the permanent set, serves to add to the length of the arch
- Eruption of the upper permanent molars adds to the length of the arch
Subperiosteal Bone Formation
- Occurs throughout life
- Serves as a main factor for the growth of the maxilla
Enlargement of the Maxillary Sinus
- Plays an important role in the growth of the body of the maxilla
- Expands by bone resorption on the sinus side and bone deposition on the facial surface of the maxillary process (pneumatization)
Bone Resorption and Bone Deposition
- Occurs also in other sites than the sinus
- Bone resorption at the floor of the nasal cavity
- Bone deposition on the oral surface of the palate
- Aids in the enlargement of the nasal cavity and increase the height of the maxilla
Development of the Mandible
- Is the largest and strongest bone of the face
- Serves for the reception of the lower teeth
- Consists of a curved, horizontal portion (body), and two perpendicular portions (rami), unite with the ends of the body nearly at right angles
Body of the Mandible
- Ossified in the fibrous membrane covering the outer surfaces of Meckel's cartilages
- Two in number, a right and a left
- Meckel's cartilage has a close relationship to the mandibular nerve at the junction between proximal and middle third
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Description
Learn about the formation of the vomer bone in the human body, including the prevomerine center and its development during intrauterine life.
