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RD1 Lecture > Intro > Flashcards

Intro Flashcards

1
Q

How many teeth in primary vs secondary dentition

A

Primary have 20 teeth

Secondary has 32 teeth

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2
Q

Mamelons vs perikymata on newly erupted teeth

A

M- three small scallops on incisal edge of anterior teeth, wear down over time

P- numerous horizontal ridges on enamel, closer together in cervical third, wear away over time

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3
Q

Root axis line aka

A

Mid-root axis line

Imaginary line through center of root
Splits tooth into facial and lingual halves
Finds the access

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4
Q

What occupies the interproximal space

A

(Aka the cervical embrasure)

The interdental papilla!!

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5
Q

Which two tissues are seen on a normal, in tact tooth

A

Enamel and cementum only

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6
Q

Contact areas move _____ and ______ as you move distally

A

They move facially and cervically

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7
Q

Embrasure space functions

A

Allow food to escape when chewing, so it does not get stuck between teeth

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8
Q

FDI numbering system

A

Rest of world uses

Secondary 
UR: 1-
UL: 2-
LL: 3-
LR: 4-
Primary
5-
6-
7-
8-
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9
Q

The CEJ becomes ________ _________ as you move distally

A

CEJ becomes less pronounced

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10
Q

Palmer notation

A

Uses half square line to notate white quadrant

In the square is a number to tell which tooth from the midline

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11
Q

HOC in posterior teeth

A

Facial- cervical

Lingual- middle third

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12
Q

What do you call the area of a root before it bifurcates

A

Root trunk

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13
Q

Dentin develops from what and what cell makes it

A

Develops form the embryonic dental papilla in the mesoderm

Made by odontoblasts

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14
Q

Only organic part of a tooth

A

Pulp

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15
Q

Cervix=

A

Cervical line

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16
Q

What do you call the space between two roots of the same tooth

A

Furcal region

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17
Q

Which of the tooth tissues are considered calcified

A

Enamel, dentin, and cementum only

Pulp is living

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18
Q

Polyphyodont

A

Animals that have an endless succession of teeth throughout their life

Ex. Sharks, alligators

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19
Q

Homodonts

A

All teeth are the same

Ex. Whales

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20
Q

Are molars considered succedaneous teeth?

A

NOOOO

Bc they come in BEHIND primary dentition, they do not replace

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21
Q

Class of teeth vs type of teeth

A

Class- incisor, canine, molar etc

Type- lateral or central, first or second

22
Q

Contact areas aka

Where are they located and exception

A

Aka proximal HOC

As you move distally, the HOC moves more cervically

EXCEPT mand 1 premolar!

23
Q

CEJ curvature from the mesial/distal view?

From the facial/lingual view?

A

M/D: convex- the CEJ dips down towards the incisal third, less enamel on sides

F/L: concave- the CEJ runs up toward the cervical line, more enamel on front and back

24
Q

What tooth tissue does HAP make up 95% of

A

Enamel

5% enamel matrix

25
Q

Heterodonts

A

Different types of teeth in the mouth

Ex. People

26
Q

Root to crown ratio

A

Length of the root relative to the crown, tellls the longevity of the tooth

A larger number = better bc there is more anchor into the bone! Longer roots, smaller crown

27
Q

Where does cementum develop from and what cell makes it

A

Develops from the dental sac of the mesoderm

Made by cementoblasts

28
Q

Anatomic vs clinical crown/root

A

Anatomic: DO NOT CHANGE!!!
Anatomic crown- ACTUAL crown area that is covered by enamel, may not be seen entirely during an exam
Anatomic root- ACTUAL root area that is covered by cementum

Clinical: CHANGES over patients life, relative to gum/bone levels
Clinical crown- VISIBLE crown size during exam, the entire structure of tooth that sticks out of the gums is known as the clinical crown
Clinical root- the part of the tooth that lies UNDER the gums during an exam

29
Q

Diphyodont

A

Two sets of teeth (dentition) over their lifetime

Ex. People

30
Q

Primary teeth present in children from what ages?

All primary teeth are shed by about what age?

A

2-6

Usually all shed by age 12/13

31
Q

Universal numbering system

A

USA!!!

1-32

32
Q

HOC of all anterior teeth for facial and lingual is in what third

A

Cervical third

33
Q

Line angle vs point angle

A

The area where 2 surfaces meet

The area where 2+ line angles meet, corner

34
Q

Monophyodont

A

Animals that only have one set of teeth their entire life, when teeth are lost they are not replaced

Ex. Whales

35
Q

What is composed of 70% HAP

A

Dentin

18% collagen

36
Q

What is pulp made of

A

Soft CT

Has a rich supply of BV and nerves

37
Q

Cementum is ______ bone, but _____ than enamel

A

Cementum is about as hard as bone, but softer than enamel

38
Q

Is the facial or lingual embrasure larger?

A

Lingual embrasure bc teeth usually narrow towards the lingual

39
Q

Height of contour

What it is and function

A

Thicket part of the tooth from buccal or lingual aspect

Functions to push food away from the soft tissue when biting/chewing

40
Q

Dentin is _____ than cementum, and _______/______ than enamel

A

Harder than cementum, and softer/less brittle than enamel

41
Q

What part of the tooth is made of 65% HAP

A

Cementum

35% organic matttter, collagen fibers

42
Q

Primary teeth have how many classes of teeth

A

3 classes
Incisors, canines, molars

No premolars

43
Q

What is the hardest substance in the body

A

Enamel

44
Q

Order of labeling line and point angles

A

MODBL

45
Q

Where does pulp develop from

A

Dental papilla in the mesoderm

46
Q

Where does enamel develop from and what cell makes it

A

Ectoderm

Ameloblasts

47
Q

Each contact has how many embrasure spaces

A

4 embrasure spaces

Incisal/occlusal embrasure
Cervical/interproximal embrasure
Facial embrasure
Lingual embrasure

48
Q

Each cusp has how many cusp ridges

A

4 cusp ridges= one cusp

49
Q

Fissure vs pits

A

Fissure is at the depth of a groove

Pits are at the depth of a fossa

50
Q

Apical foremen

A

At root tip of teeth where the dentin stops covering, there is a hole where nerves and BV enter

RD1 Lecture (10 decks)

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