VM craniofacial development Flashcards
what process is this?
mandibular process
what process is this?
maxillary process
developing tooth -> dental lamina and tooth germ
meckel’s cartilage
tongue
palatal shelves
maxillary nerve trunk
what is this and its function?
nasal capsule
primitive support
dental lamina
what is this structure?
nerve trunk
no nuclei in axons as they are in cell bodies that are miles away in the trigeminal ganglion, nuclei we do see are supporting cells
what structures are derived from meckel’s cartilage?
Malleus, mandible, sphenomandibular ligament and sphenomalleolar ligament
what structures are derived from the nasal capsule?
Midline nasal septum and ethmoid bones
predict what age the embryo is, why?
Week 7 as palatal shelves down lateral tongue and tongue takes up most of the space
Week 6 is when see the first evidence of tooth development
compare the histology of the different structures
palatal shelves
tongue
meckel’s cartilage
early tooth development
maxillary nerve trunk
nasal capsule
what is the line pointing at?
bone formation
what age is this specimen? why?
Week 8, palatal shelves elevated but not fused yet
which forms first maxilla or mandible?
mandible
mandibular process
meckel’s cartilage
mandibular process
developing mandible
what is this structure at the base of the nasal capsule?
developing vomer
dark cells are osteoblasts making bone
note this
what is this?
Nasal capsule is made up of cartilage -> nasal septum is part of it
what is this in the maxillary process?
maxillary nerve trunk
tooth germ
maxillary nerve trunk
palatal shelves
tooth germ
meckel’s cartilage
developing mandible
inferior alveolar nerve
this will be the sulcus
look at this inferior alveolar nerve next to the developing mandible
what are these?
Remnants of nasal capsule
Condensed ectomesenchymal cells that will make dentine and pulp
Epithelial cells that will form ameloblasts and make enamel
