Tooth Morphology Chapter 11, 12, 28 Flashcards
Morphology is the
study of the form of a body part
tooth morphology is the
study of shape, size, form, structure of teeth
Which dental arch is stationary
maxillary
Occlusion is the surface/action of
top surface of tooth, and contact between arches
The two types of dentition are
primary and permanent
What are the three dentition periods
Primary(deciduous), Mixed, Permanent(Succedaneous)
When does the primary dentition period occur?
6 months to 6 years old
Mixed dentition period occurs during years
6 and 12
When the last primary tooth is shed what proceeds
Permanent dentition
The premature loss of baby teeth can result in
misalignment, spacing and occlusal complications
Primate spaces
the spaces between baby teeth
Succedaneous teeth
Permanent teeth following a primary
The nonsuccedaneous teeth are the
12 adult molars
The anterior teeth include
incisors and canines
the posterior teeth include
premolars and molars
Mesial and distal surfaces are where
toward and away from the midline
Lingual and buccal surfaces are located
towards the cheek (posterior) and toward the tongue (anterior)
Where is the labial surface of a tooth
toward the lips (anterior)
The top biting edge of an anterior tooth is the
incisal edge
Occlusal surface of the tooth is where
the top biting surface of anterior teeth
The palatal surface only refers to which arch
the maxillary arch
Facial and vestibular surfaces are used where in the mouth
labial surface of anterior and buccal surface of posterior
how many surfaces do teeth have on the crown
5
Cervical surface of tooth is located
by the gingiva
a cusp is a
major elevation on biting surface
What is a fossa
wide shallow depression on lingual anterior teeth and occlusal surface of posterior(receiving cusp)
Ridge
thin elongated surface on medial/distal
What are mamelons
rounded enamel extensions on incised edge of newly erupted teeth
The cusp of carabelli (5th cusp) is found on which teeth
the perm. max. first molar and prim. max. second molar
A central groove is the
most prominent groove on posterior occlusal surface
Where can you find height of contour
At the point of greatest circumference
Marginal grooves are where
medial/distal edges on lingual side of anterior teeth and occlusal surface of posterior teeth
which premolar has two roots
maxillary first premolar
mandibular molars have how many roots
2
maxillary molars have how many roots
3
third molar is also known as the
wisdom tooth
Contact areas are on the
mesial or distal surface of tooth in contact with adjacent tooth
Contact points are
the direct point where teeth contact
Embrasures are the spaces
above and below contacts
Line angles are the junction of
two walls
Point angles are the junction of
3 surfaces
Occlusal/ incised divisions are located on the
nearest to biting surfaces of teeth
The apical division is the
nearest to root
Cervical division is nearest to the
neck of the tooth
The universal system numbers permanent teeth as
1-32, starting max right and ending man right
Universal primary teeth are assigned as
A-T, clockwise
FDI system uses what kind of counting system
A two digit system
FDI quadrants are numbered 1-4 and 5-8 in what direction
clockwise staring maxillary right
If a tooth is missing does it affect the numbering
no
Palmer notation primary teeth are lettered
A-E per quadrant
the cornerstones of the dental arch is the
canine teeth
Which teeth are commonly missing at birth
the lateral incisors and third molars
which primary tooth erupts first and when?
the central incisor at 6-10 months
What age do the first permanent molars come in?
6-7 years
The maxillary 2nd molar erupts at age
11-13 years
Which two teeth erupt together at age 12-13?
Maxillary 2nd molar and mandibular 2nd premolar
what tooth eruption ends the mixed dentition stage
the mandibular second premolar
Centric occlusion
stable contact of jaws
functional occlusion
contact during biting or chewing
malocclusion
abnormal/malpositioned relationship of teeth
Normal occlusion is the occlusion of
cusps with no misalignment
Malocclusion Class 1
Neutrocclusion - the molars align but teeth are crooked
Malocclusion Class 2
Distocclusion - The maxillary molars are to far forward (overbite)
Malocclusion Class 3
Mesiocclusion - The 3rd molars are behind lower molars (underbite)
An underbite is class
3
overbite is class
2
crooked teeth but proper occlusion is class
1
Class I of cavity’s is the
top of molars, fossa of anterior
Class II of cavities is the
proximal surfaces of molars and premolars
Class III of cavity’s is the
proximal surfaces of incisors and canines(not the edges)
Class IV of cavity’s is the
Proximal surfaces of incisors and canines including edges
Class V of the cavity’s is
Cervical third of all teeth
Class VI of cavity’s is the
edge of anterior and tip of cusps
Closure is defined as
the jaws closing starting from posterior teeth for stability
Curve of Spee
occlusion of Maxillary Mandibular making a curve
Curve of Wilson
line across occlusal surface from molar to molar
