Tooth Morphology Chapter 11, 12, 28 Flashcards by rebecca hannigan

Morphology is the

study of the form of a body part

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tooth morphology is the

study of shape, size, form, structure of teeth

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Which dental arch is stationary

maxillary

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Occlusion is the surface/action of

top surface of tooth, and contact between arches

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The two types of dentition are

primary and permanent

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What are the three dentition periods

Primary(deciduous), Mixed, Permanent(Succedaneous)

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When does the primary dentition period occur?

6 months to 6 years old

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Mixed dentition period occurs during years

6 and 12

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When the last primary tooth is shed what proceeds

Permanent dentition

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The premature loss of baby teeth can result in

misalignment, spacing and occlusal complications

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Primate spaces

the spaces between baby teeth

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Succedaneous teeth

Permanent teeth following a primary

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The nonsuccedaneous teeth are the

12 adult molars

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The anterior teeth include

incisors and canines

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the posterior teeth include

premolars and molars

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Mesial and distal surfaces are where

toward and away from the midline

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Lingual and buccal surfaces are located

towards the cheek (posterior) and toward the tongue (anterior)

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Where is the labial surface of a tooth

toward the lips (anterior)

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The top biting edge of an anterior tooth is the

incisal edge

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Occlusal surface of the tooth is where

the top biting surface of anterior teeth

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The palatal surface only refers to which arch

the maxillary arch

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Facial and vestibular surfaces are used where in the mouth

labial surface of anterior and buccal surface of posterior

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how many surfaces do teeth have on the crown

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Cervical surface of tooth is located

by the gingiva

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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

maxillary molars have how many roots

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

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

overbite is class

crooked teeth but proper occlusion is class

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