TMJ Flashcards
(41 cards)
_______: Initial appearance/s of bone tissue in the area where each of the 206 bone organs of the body form ____________________.
ossification centers
1 mandible & 2. maxillae of the 22 adult skull bone organs
Where do ossification centers appear
Within mesenchyme called intramembranous bone organ development
or on or within cartilage model (called endochondral bone organ development)
How many ossification centers are found in intramembranous bones?
1 mandible has 2 ossification centers
2 maxillary bones have 2 ossification centers
How many ossification centers are found in endochondral bones?
in the ulna you will find 3 ossification centers.
Femur: 5 centers
What bone for example has a mixed ossification center? what does that mean?
Temporal bones.
It means they have both intramembraneous and endochondrial ossification centers.
A highly vascular connective tissue is referred to by some as ______
intramembranous bone tissue (don’t confuse with intramem. ossficiation centers)
one of what is found in each mandibular process of branchial arch 1?
paired meckels cartilages
_____ temporary skeleton of mandibular process of branchial arch 1
meckels cartilage
Meckles cartilage serve as a temporary attached for ______ that eventually attach to the ______
muscles
mandible
Each Meckles cartilage serves as models for 2 ear ossicles: ____ & ____
malleus and incus
Each Meckles cartilage serve as site for the appearnace of 2 ligaments:
Anterior mallelar and sphenomandibular
_______ serve as temporary ant. lingual plate of forming mandible halves
meckles cartilage
Meckles cartilages serve as enclosed _____ at the chin end of the mandible halves
growth sites
meckles cartilages serve as both _______ of ear ossicles and as a _____ of each mandible halve
ossification centers
growth sites
the mandible develops as:
2 bilateral halves that exist throughout the INTERUTERINE period.
The mandible develops 2 bilteral halves that exist throughout the _________ period
interuterine period
When does the mandible become one of the 22 skull bones?
when the osseous union occurs between the halves at the end of the first postnatal year.
What week does the mandible develop?
6th embryonic week
What/where does the mandible arise from?
The mandible arises from 2 bilateral ossification centers that are lateral to meckles cartilages
Within what tissue does the mandible arise from?
mesenchymal tissue
in the mandible: which side of the bone incorporates the distal parts of meckles cartilages.
What does this become?
Anterior
It becomes the temporary lingual plate and a growth site of each mandible have.
Developing mandible:
_____ side of the bone is in the form of a U featuring what to plates?
What’s unique about one of the plates ^
posterior.
featuring facial and lingual plates.
The post end of the facial plate incorporates an INDEPDENT piece of HYALINE cartilage that becomes “condylar cartilage” another growth side of each mandible half.
T/F Condylar cartilage arises from meckles cartilage
FALSE. It does NOT arise from meckles cartilage. It’s independent.
Location of the ossification center of a mnadible half
Lateral to meckles cartilage at the site of branching of the mental and incisive nerves from the inferior alveolar nerve: site of future mental foreamen.
