CHAPTER 1 Flashcards
(42 cards)
the primary dentition includes how many teeth and what types?
8 incisors, 4 canines, and 8 molars total of 20 teeth
A-J & K-T
the permanent dentition includes how many teeth and what types?
8 incisors, 4 canines, 8 pre-molars, and 12 molars total of 32 teeth 1-16 & 17-32
what is the only dentition with pre-molars? and what do they replace?
the permanent dentition only has pre-molars and they replace the molars in the primary dentition
when does the primary dentition begin? what are the first teeth to erupt?
begins with the eruption of the primary mandibular central incisors (P&O) occurs between 6 months.
when do most children have all of their primary teeth by?
age 3
when do children start loosing first tooth?
age 6
what is the first permanent tooth to erupt?
the permanent mandibular first molar (19&30)
what is the mixed dentition and when does it occur?
it follow the primary dentition period, occurs between 6-12 year old includes both primary and permanent teeth color change between teeth comes noticeable and jaw also grows this stage is known as the ugly duckling stage
when does the permanent dentition begin?
begins with the shedding of the last primary tooth usually after 12 years old includes the eruption of all permanent teeth, expect for those teeth congenitally missing or impacted and can not erupt
what the D-A-Q-T system and what does it describe?
it is used when describing individual teeth D-DENTITION (permanent, mixed, primary) A-ARCH (maxillary arch, mandibular arch) Q-QUADRANT (UR, UL, LR, LL) T-TOOTH (A or 1 system)
what is the alveolar process?
bone that holds teeth in place
what is the alveolus?
the socket of each tooth
which teeth have a single cusp?
maxillary and mandibular canines
which teeth have two cusps?
maxillary pre-molars and the mandibular first premolar
how many cusps does the mandibular second pre-molar have?
3
what are the two places in the dentin where two mesial surfaces touch?
8&9 and 24&25
on any tooth is the CEJ curvature greater on the mesial or the distal?
mesial
what are embrasures and how are they formed?
what are the different types?
triangles formed by slopping away of mesial and distal surfaces. Facial embrasures, lingual embrasures, incisal/occlusal embrasures, and apical embrasures with loss of tissue
what is the height of contour for anterior teeth?
cervical third
where are developmental pits located?
in the deepest part of each fossa
what are the four developmental lobes for anteriors?
mesiolabial, middle labial, distolabial, and lingual
what are the characteristics of the maxially central incisors?
widest crown mesiodistally greatest CEJ curvature distal offset cingulum shallow lingual fossa marginal ridges overall conical root shape no proximal root concavities rounded root apex triangular root in cross section
what are the characteristics of the maxially lateral incisors?
greatest crown variations smaller than maxially central prominent lingual surface centered cingulum pronounced marginal ridges root curves distally with sharp apex oval root in cross section same or longer root than central but thinner
what are the characteristics of the mandibular central incisors?
smallest and simplest tooth bilaterally symmetrical small centered cingulum subtle lingual fossa bow-shaped root on cross section root is longer than crown proximal root concavities give double rooted appearance
