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dental anatomy test

chapter 1

TermDefinition
maxilla (maxillary) upper jaw
mandible (mandibular) lower jaw
each tooth has a crown and a root
the crown is covered with enamel
the root is covered with cementum
where are the crown and root joined? the cementoenamel junction/cervical line/CEJ
the neck or side of the tooth is known as? the cervix
anatomical crown the entire crown and is covered by enamel
clinical crown the portion of the tooth that is visible in the mouth
anatomical root the entire root and is covered by cementum
clinical root the portion of the tooth that cannottermi be seen in the mouth
terminal end of the root root apex
if there is more than 1 root what is the name for this? apices
small opening at the end of the root apical foramen
if there is more than 1 root, what are the small openings at the end of the root called? apical foramina
root trunk area between bifurcation and CEJ
bifurcation any area on the tooth between 2 roots
how many roots do your anterior teeth have? 1
how many roots do your mandibular molars have? 2
how many roots do your maxillary molars have? 3
furcation area the area at which the root branches on multirooted teeth
teeth with 2 roots are bifurcated
teeth with 3 roots are trifurcated
portion of the jaw that supports the teeth the alveolar process or alveolar bone
what is the bony socket in which the tooth fits? the alveolus
how many hard tissues are there and what are they? 3 – enamel, dentin, cementum
how many soft tissues are there and what are they? 1 – pulp
chemical composition of enamel 96% inorganic and 4% organic
dentin mineralized tissue that is harder than bone and cementum but softer than enamel
texture of dentin elastic in nature
junction of the dentin and enamel DEJ or dentinoenamel junction
chemical composition of dentin 70% inorganic and 30% organic
when does primary dentin begin to form before eruption and continues until the tooth fully erupts
which dentin forms the bulk of the permanent tooth? the primary dentin
when does secondary dentin begin to form? after eruption and continues at a very slow rate throughout the life of the tooth
what direction does the secondary dentin grow in? grows in towards pulp as there is always trauma on the tooth (birthing, movement, chewing) that stimulated it to grow
another name for tertiary dentin reparative dentin
when does tertiary dentin form forms in response to irritation and appears as a localized deposit
where does tertiary dentin form? on the wall of the pulp chamber
what is cementum? a bone-like structure that covers the root
chemical composition of cementum 45-50% inorganic and 50-55% organic
where is cementum thick and where is it thin? thin at the CEJ and thicker at the root apex
function of cementum to provide a method for the attachment of the tooth to the alveolar bone
what is the DCJ? dentinocemental junction it is the union of the dentin and the cementum
another name for acellular cementum primary cementum
what does acellular cementum cover? the entire anatomical root
another name for cellular cementum secondary cementum
where does the cellular cementum form? on the apical 1/3 of the root
pulp is also known as nerve of the tooth
composition fo pulp blood vessels, lymph vessels, connective tissue and odontoblasts
nutritive functions of the pulp provides nourishment via blood vessels at the root apex (apical foramen)
sensory functions of the pulp nerve supply of the pulp receives and transmits pain stimuli
reparative functions of the pulp odontoblasts help in the formation of secondary dentin with the tooth is subjected to trauma
coronal pulp (pulp chamber) occupies the crown of the teeth
pulp horns extensions of pulp within the pulp chamber that project toward the cusp tips
pulp canal (radicular pulp) located within the roots of the tooth
Created by: presleydlc
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