Tooth Morphology Flashcards by Kate Niznik

Morphology

The study of the form of an organ or body part

How well did you know this?

Not at all

Perfectly

Tooth morphology

Study of the size, shape, form and structure of the teeth

How well did you know this?

Not at all

Perfectly

How many dental arches do we have?

How well did you know this?

Not at all

Perfectly

What are the two dental arches

Maxillary and mandibular

How well did you know this?

Not at all

Perfectly

Occlusion is when?

The teeth in both arches are in contact

How well did you know this?

Not at all

Perfectly

Dentition refers to

The arrangement of the teeth as a set; the natural teeth in the dental arch

How well did you know this?

Not at all

Perfectly

Primary dentition

Baby teeth

How well did you know this?

Not at all

Perfectly

Permanent dentition

Adult teeth

How well did you know this?

Not at all

Perfectly

How many dentition periods?

How well did you know this?

Not at all

Perfectly

What are the 3 dentition periods?

Primary, mixed, permanent

How well did you know this?

Not at all

Perfectly

Primary (deciduous) dentition

Assists with speech, provides chewing surfaces to strengthen muscles of mastication
-important for guiding permanent teeth into proper position

How well did you know this?

Not at all

Perfectly

Premature loss of primary teeth can lead to problems in

Alignment, spacing and occlusion of permanent dentition

How well did you know this?

Not at all

Perfectly

In primary dentition there is a total of how many teeth and when does it occur ?

20 teeth. Occurs between 6 months and 6 years of age

How well did you know this?

Not at all

Perfectly

Mixed dentition

Occurs between 6 and 12 years when primary teeth are exfoliating and permanent teeth are erupting

How well did you know this?

Not at all

Perfectly

Succedaneous teeth

Permanent teeth that replace deciduous teeth

How well did you know this?

Not at all

Perfectly

How many teeth in the permanent dentition

How well did you know this?

Not at all

Perfectly

Anterior teeth

Incisors and canines (cuspids)

How well did you know this?

Not at all

Perfectly

Posterior teeth

Premolars (bicuspids) and molars

How well did you know this?

Not at all

Perfectly

Each arch can be divided into 2 what?

Sextants

How well did you know this?

Not at all

Perfectly

Sextants are

1/6th of the dentition

How well did you know this?

Not at all

Perfectly

Sextants divided

into maxillary right and left (posterior and anterior)

Mandibular right and left (posterior and anterior)

How well did you know this?

Not at all

Perfectly

Quadrants make up

1/4 of the dentition

How well did you know this?

Not at all

Perfectly

Mesial

Toward midline

How well did you know this?

Not at all

Perfectly

Distal

Away from midline

How well did you know this?

Not at all

Perfectly

Lingual

Inside, toward tongue

Labial

Outside toward lips

Incisal

Biting or cutting edge

Buccal

Outside, toward cheeks

Occlusal

Grinding or chewing surface

Major elevation on the masticatory surfaces of the canines and posterior teeth

Cusp

Fossa

Wide shallow depression on the lingual surfaces of anterior teeth and occlusal surfaces of posterior teeth

Raised, rounded area on the cervical third of the lingual surface.

Cingulum

Ridge

Thin elongated surface

Mamelon

Rounded enamel extensions on the incisal edge of newly erupted incisors

The 5th supplemental cusp found lingual to the mesiolingual cusp

Cusp of carabelli

Central groove

Most prominent groove on posterior teeth

Function of the incisor

Cut food without heavy force

Canines

Cutting and tearing of food with force

Premolars

Grasping, tearing, grinding

Molars

Chew and grind food

3 anatomical features of teeth are

Contours, contacts and embrasures

Contour is

Crown of the tooth which narrows towards the cervical line

The mesial or distal surface of a tooth that touches the adjacent tooth in the same arch

Contact area

Contact point

Exact spot at which the teeth actually touch each other

Contacts do what?

Prevent food impact ion, protects interproximal tissues and stabilizes the arches

An embrassure is what

Is a triangular space between the proximal surfaces of two adjoining teeth in contact

A line angle is a junction of how many walls

A point angle is formed by the junction of how many surfaces

Both primary and permanent anterior teeth have how many roots

All premolars/bicuspids have how many roots. The exception is the max. First pre molar and it has how many?

Premolars/bicuspids have 1 | Max first premolar has 2

All max molars have how many well formed & separated roots? ***except for the third molar***

All mand molars have how many well formed & separated roots?

What are the 3 tooth numbering systems

Universal, international/FDI and Palmer

What does MODBL stand for

Mesio-occluso-disto-bucco-lingual

OB stands for

Occlusobuccal

Date of eruption for a central incisor

6-10months

Date of eruption for lateral incisor

9-12 months

Date of eruption for first molar

12-18 months

Date of eruption for canine

16-22 months

Date of eruption for second molar

24-32 months

Habits such as thumb sucking or improper swallowing habit can affect

Occlusion

Centric occlusion

Jaws are closed in a position that produce maximal stable contact between the occluding surfaces of the max and mand teeth

Functional occlusion

Contact of the the teeth during biting and chewing movements

Malocclusion

Abnormal relationship of the teeth

Normal occlusion is when

Mesiobuccal cusp of permanent maxillary first molar occluded with mesiobuccal groove of the mandibular first molar

Maxillary canine occluded with distal half of mand canine and the mesial half of the mand premolar

Normal occlusion

Basis of angles classification system is that

The permanent maxillary first molar is the key to occlusion

There are three classifications of occlusion

``` Class 1 Class 2 which is split into division 1 and 2 And class 3 ```

Class 1 occlusion is knows as a

Neutroclusion

Neutroclusion is when

The mesiobuccal cusp of permanent maxillary first molar occluded with the mesiobuccal groove of the mandibular first molar Also known as crooked teeth caused by crowding or spacing

Class 2 is known as

Distoclusion

Distoclusion is when

Mesiobuccal cusp of permanent maxillary first molar occluded mesial to the mesiobuccal groove of the mandibular first molar Also known as an overbite

Class 3 is known as

Mesioclusion

Mesioclusion is when

Mesiobuccal cusp of permanent maxillary first molar occludes distal to the mesiobuccal groove of the mandibular first molar Also known as an underbite

Curve of spee

What is the name for the arc of the occlusal plane

Curve of Wilson

Defined by a line drawn across the occlusion surface of the left mandibular first molar across the arch and through the occlusal surface of the right mandibular first molar

Antagonist

Every tooth in the oral cavity has 2 antagonists EXCEPT THE MANDIBULAR central incisors and maxillary 3rd molars

Cavity class 1

Occlusal on posteriors and lingual out of anteriors

Cavity class 2

Proximal surfaces of posteriors | In between sides touching other teeth, hard to see

Cavity class 3

Proximal surfaces of incisors and canines ***same as 2 just on different teeth***

Cavity class 4

Proximal surfaces of incisors and canines, similar to class 3 except it includes the incisal edge

Cavity class 5

Gingival third of the facial or lingual surface of any tooth Near base of tooth above gums

Cavity class 6

Incisal edges of anterior teeth Cusp tips of posterior teeth Appears as lesions on biting surface of teeth

Tooth Morphology Flashcards

(83 cards)