Exam 1 Flashcards
Deciduous Mandibular Central Incisor comes in when?
6 months
**First primary teeth appears in dentition about
6 months
Newly primary teeth form prenatally at 14 weeks called
tooth bud forming
Deciduous teeth are completed postnatally at what age?
3 years of age
Transition (mixed dentition)
in which there is a mixture of deciduous (baby) and succedaneous
(permanent) teeth present.
When does transition/mixed dentition end?
11-12 years old. Ends when all the deciduous teeth have been shed.
Succedaneous
used to describe a successor dentition
Are molars succedaneous teeth?
NO
What numbering system is used in dentistry?
Universal
Primary Maxillary teeth, beginning with the right second molar, number them
letters A through J
Primary mandibular teeth, beginning with the left mandibular second molar, number them
letters K through T
The crown is covered with
enamel
the root portion is covered with
cementum
The crown and root join at the
CEJ *cemento-enamel junction
CEJ *cemento-enamel junction is also called
cervical line
The main bulk of the tooth is composed of
dentin
Hard tissues are
enamel, dentin, cementum
pulp chamber is in
crown portion mainly
pulp canal
is in the root
Pulp is hard/soft tissue
soft
What does pulp do?
furnishes the blood and nerve supply
alveolar process
That portion of the jaw serving as support for the tooth
alveolus
The bone of the tooth socket
Surfaces in incisors and canine is what kind of ridge
4 surfaces in 1 ridge
Premolars and molars have how many surfaces?
5
**Labial
toward the lips are called labial surfaces in incisors and canine (anteriors ONLY)
buccal
In the premolars and molars only, those facing the cheek (posterior ONLY)
**Labial and buccal surfaces are what kind of surfaces?
Facial surfaces
occlusal surfaces
biting edge surfaces (posterior teeth)
incisal surfaces
Edge of anterior teeth.
Periodontal ligament
fibrous attachment of the tooth cementum to alveolar bone
Gingiva
“gums”, fibrous tissue covered by a mucous membrane, covers alveolar process and
surrounds the necks of the teeth.
cusp
an elevation on the (enamel) , making up the occlusal
surfaces. Only found on posterior teeth.
tubercle
a smaller elevation on some portion of the crown produced by an extra formation of
enamel
cingulum
the lingual lobe of an anterior tooth (incisor). It makes up the bulk of the cervical
third of the lingual surface.
ridge
linear elevation of enamel. Ridges are found on all teeth* and all teeth have 2 marginal
ridges**
Marginal ridges
rounded borders of the enamel that form the mesial
or distal margins of the occlusal surfaces of posterior teeth, as well as incisal surfaces of anterior
teeth (*remember, found on ALL teeth)
Triangular ridges
descend from the tips of the cusps of molars and premolars toward the
*central part of the *occlusal surfaces
transverse ridge
the union/ combination of *two triangular ridges (buccal and lingual side)
crossing transversely the surface of a posterior tooth
oblique ridge
a ridge crossing obliquely the occlusal surfaces of maxillary 1st molars as
elevation. Formed by the union of the triangular ridge of the DB cusp and ML cusp*
Cusp ridge:
every cusp have 4 ridges that extend from the cusp tip to 4 directions (mesial, distal,
buccal and lingual)
fossa
is an irregular depression or “concavity” or deep valley.
Central fossae
on the occlusal surface of molars.
Lingual fossa:
located on the lingual surface of incisor teeth, depression
Triangular fossae
found on molars and premolars on the occlusal mesial or distal ridges.