Dental Anatomy Quiz 1 Flashcards
At how many weeks to primary teeth form?
16 weeks in utero
when are the primary teeth complete?
age 3 years
when do infants first receive teeth?
about 6 months of age
how many teeth exist in the primary dentition? What teeth are missing from the primary dentition that exist in the secondary dentition?
20
premolars and 3rd molars in all 4 quadrants of the mouth
When is the period of life where mixed dentition typically exists?
6-12 years old
What is the palmer numbering system?
a number 1-8 with a right angle showing which quadrant it exists in
What is the FDI numbering system?
it is a two number system. the first shows the quadrant starting with upper right and ending in lower right. the second number is 1-8 showing which tooth in that quadrant
What is the universal system for Primary Teeth? for secondary teeth?
for primary it is A-T starting with upper right second molar ending with lower right second molar. Secondary teeth are numbered 1-32 starting with the upper right third molar and ending with the lower right third molar
What is the Cementoenamel junction?
The line between the root and the crown or in other words the line between the cementum and enamel
What are the 4 tooth tissues?
Enamel
Dentin
Cementum
Pulp
What direction are do the words facial, labial, buccal, mesial, distal, and lingual refer to?
facial - toward cheeks or lips Lingual - toward tongue Buccal - toward cheek labial - toward lips mesial - toward midline along the arch distal - away from median along the arch
How many roots are on the incisors and some premolars?
1 single root
how many roots found in some premolars and molars?
2 roots
how many roots found in maxillary molars?
3 roots
Know the names of the line angles. They are just directional names. How many line angle names exist for anterior teeth? Posterior teeth?
there are 6 for anterior and 8 for posterior teeth
When the maxillary incisors are newly erupted the edge is not completely formed, when does it form?
after wear has occurred
what is the name of the ridge on the posterior side of the maxillary central tooth? and the pit on the posterior side of the same tooth?
mesiolingual ridge
lingual fossa
What are the dimensions of the crown of maxillary central teeth?
10.5 high by 8.5 wide
How long is the root in comparison with the crown of the maxillary central tooth?
about 2-3mm longer
The curvature of the cervical line is greater on the mesial or the distal side of the maxillary central teeth?
the curvature of the cervical line is greater on the mesial surface
What overall geometric shape are the maxillary central teeth when viewed from the incisal view?
triangular
The pulp chamber of maxillary central teeth follows the general shape of the tooth and is thickest where and in what direction is it thickest?
It is thickest at the cervical line labio-lingually
What tooth may vary more than any other with the exception of the third molar?
Maxillary lateral
What are the dimensions of the Maxillary Central incisor in millimeters?
Length of crown - 10.5 Root length - 13.5 MD diameter of crown - 8.5 MD of crown at cervix - 7.5 LL diameter of crown - 7.0 LL diameter of crown at cervix - 6.0 Mesial Curvature of cervical line - 3.5 Distal Curvature of cervical line - 2.5
