Principles of Growth and Development
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when does the stomodeum form in the embryo?
when is the height of cartilagenous skeletal development?
3rd month intrauterine
explain the development of the mandible
intramembranous bone formation. condylar cartilage develops separately and fuses with the mandibular ramus
list 3 birth defects associated with Pierre Robin
- 1. micrognathia
- 2. glossoptosis
- 3. cleft palate
describe Treacher Collins Syndrome
- 1. autosomal dominant
- 2. neural crest migration/proliferation in 1st and 2nd branchial arches does not occur normally
- 3. microtia, deafness
describe Pheiffer Syndrome
- 1. fusion of cervical vertebrae
- 2. fusion of coronal sutures occurs pre-natally
condylar/mandibular growth is closest to which growth curve?
general growth curve
maxillary growth follows what type of growth curve
neural growth curve
which grows first/faster, maxilla or mandible?
maxilla: follows neural growth; neural growth is faster than general growth (mandible)
what type of growth does the cranial vault exhibit?
intramembranous bone formation
what type of growth do epiphyseal plates undergo?
the cranial base undergoes what type of formation?
what makes the initial form of the cranial base?
what type of growth does the maxilla undergo?
Postnatal intramembranous ossificiation
describe the growth of the mandible
the body of the mandible grows longer by appositional growth on its posterior surface while the ramus grows higher by endochondral replacement
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