DEVELOPMENT OF MAXILLA PPT

May 25, 2012 | By | Reply More

DEVELOPMENT OF MAXILLA PPT

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DEVELOPMENT OF MAXILLA

INTRODUCTION:

Develops from a centre of ossification in the mesenchyme of the maxillary process
No primary cartilage exists
Centre of ossification is closely associated with the cartilage of the nasal capsule
Primary centre of ossification develops near the division of inferior orbital nerve into anterior superior alveolar nerve (future infra orbital region)

PRIMARY OSSIFICATION:

From the centre of ossification the bone formation extends posteriorly towards the developing zygoma and anteriorly towards the incisor region
Ossification spreads superiorly to form the frontal process of maxilla
A bony trough is formed for the infra orbital nerve
From this trough lateral alveolar plate forms for the developing tooth germs
Ossification spreads into the palatine processes to form the hard palate
Medial alveolar plate develops from the palatal process
Medial and lateral alveolar plates form the trough for the tooth germs

SECONDARY CARTILAGE:

Also known as the zygomatic or the malar cartilage, appears in developing zygomatic process of maxilla
At birth body of maxilla is relatively small as it lacks the maxillary sinus
 

MAXILLARY SINUS:

Forms during the 16th wk as shallow groove on the nasal aspect of the developing maxilla
Still rudimentary at birth and is that of a size of a pea

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Category: Dental

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