Lecture 1 Dental Anatomy Flashcards
what is the foundation of good dentistry?
dental anatomy and occlusion
primary (deciduous) dentition in utero
16 weeks
primary (deciduous) dentition first appearance
6 months
primary (deciduous) dentition last appearance
24 months
primary (deciduous) dentition complete
3 years
lower central incisor: what age erupt? shed?
6-10 mo<br></br>6-7 yrs
lower lateral incisor: what age erupt? shed?
10-16 mo<br></br>7-8 yrs
lower canine (cuspid): what age erupt? shed?
17-23 mo<br></br>9-12 yrs
lower first molar: what age erupt? shed?
14-18 mo<br></br>9-11 yrs
lower second molar: what age erupt? shed?
23-31 mo<br></br>10-12 yrs
upper central incisor: what age erupt? shed?
8-12 mo<br></br>6-7 yrs
upper lateral incisor: what age erupt? shed?
9-13 mo<br></br>7-8 yrs
upper canine (cuspid): what age erupt? shed?
16-22 mo<br></br>10-12 yrs
upper first molar: what age erupt? shed?
13-19 mo<br></br>9-11 yrs
upper second molar: what age erupt? shed?
25-33 mo<br></br>10-12 yrs
how long does mixed dentition last?
6 years (ages 6-12)
which teeth are normally the indicators of mixed dentition?
mandibular molars or centrals
what teeth replace exfoliated deciduous teeth?
succedaneous
what primary teeth are replaced by permanent molars?
none
are all permanent teeth succedaneous?
no, perm molars do not succeed any primary teeth
what is the formula for mammalian teeth?
primary: 2[I
2/2 C 1/1 M 2/2 ]=20<br></br>permanent: 2[I 2/2 C 1/1 P 2/2 M 3/3] = 32
what are the 4 types of tooth numbering systems?
palmer<br></br>viktor harderup<br></br>FDI (Federation Dentaire
Internationale)<br></br>universal system
palmer numbering
<img></img><br></br><img></img><br></br>
FDI numbering
<img></img><br></br><img></img><br></br>reads as 1 of 1; 2 of 1; etc.
universal notation (deciduous)
<img></img><br></br>A-J for maxillary<br></br>K-T for mandibular
universal notation (permanent)
<img></img><br></br><span>1-16</span> for
maxillary<br></br><span>17-32</span> for
Mandibular
crown and root anatomy
<img></img>
Anatomical crown
<div>CEJ to incisal edge</div>
Clinical crown
from the gum to incisal
what are the four tooth tissues? and type of tissue?
enamel- hard tissue<br></br>dentin- hard tissue<br></br>cementum- hard tissue<br></br>pulp- soft tissue
what is the top arch called?
maxillary
what is the bottom arch called?
mandibular
what are the surfaces of the teeth? (image)
<img></img>
cusp
elevation or mound on the crown
tubercle
small elevation on some portion of the crown (deviation from typical form)
cingulum
a lingual lobe of an anterior tooth
ridge
a linear elevation on the surface of the tooth
marginal ridge
rounded borders of the enamel that form the MD margins on the occlusal surfaces of the premolars and molars // MD margins of the lingual surfaces of the incisors and canines
triangular ridges
descend from the tips of the cusps of molars and premolars toward the central part of the occlusal surfaces
transverse ridge
when the buccal and lingual triangualr ridge join
oblique ridge
a ridge crossing obliquely the occlusal surface of max molars (union of DB cusp and ML cusp)
fossa
an irregualr depression or concavity
lingual fossa
on lingual surfaces of incisors
central fossa
on occlusal surfaces of molars
triangular fossa
found on premolars and molar surfaces mesial and distal to marginal ridges
sulcus
long depression or valley in surface of a tooth btw ridges and cusps (developmental groove at the junction of inclines)
developmental groove
shallow groove or line between the primary parts of the crown or root
supplemental groove
less distinct, shallow linear depression on the surface of a tooth and does not mark the junction of primary parts
buccal and lingual grooves
developmental grooves found on the buccal and lingual surfaces of posterior teeth
pits
small pinpoint depressions located at the junction of developmental grooves or at terminals of the grooves
lobe
one of the primary secrions of function in the development of the crown. cusps and mamelons are examples
mamelons
any one of the three rounded protuberances found on the incisal ridges of newly eruptes incisor teeth
identify ridges on the occlusal
<img></img>
what are cusps on canines, premolarsm and molars used for?
cutting and holding
what do incisors have to be able to cut?
ridge or edge
example of ridges on the occlusal
<img></img>
how many roots do incisors, canines, and some premolars have?
single
how many roots/type of root do premolars and molars have?
two roots with a bifurcation