Dnh 111- Chapter 3 (Fundamental And Preventative Curvatures)

Front 1

What part of the tooth aids in preventing disease, damage, bacterial invasion, and calculus buildup?

Back 1

Tooth curvatures

Front 2

What disperses excessive occlusal trauma and protects gingiva?

Back 2

Tooth curvatures

Front 3

What could cause the vascularity, internal papillary tissue, gingiva, and bone between and around surrounding teeth to be jeopardized, and decrease tooth life expectancy?

Back 3

Damage to the periodontium

Front 4

What helps prevent food from packing in between two teeth, gives protection to underlying gingiva, and offers support and resistance to adjacent teeth?

Back 4

Contact Areas

Front 5

Contact areas are located where?

Back 5

On the distal and mesial surfaces of each tooth, at the widest portion, and greatest curvature.

Front 6

A flattened area of the tooth where it touches the adjacent tooth is called what?

Back 6

A contact area

Front 7

What is a contact point?

Back 7

Where the occlusal cusp of one tooth touches the occlusal portion of another tooth in the opposite arch.

Front 8

What do we call the gingiva between the teeth?

Back 8

Interdental papilla OR papillary gingiva

Front 9

What is the purpose of normal internal space?

Back 9

It provides a place for a bulk of bone, which offers better anchorage and support.

Front 10

Is interdental space wider cervically or occlusally? Why?

Back 10

Cervically

It provides more access for vascular support to nourish the interdental bone and papillary tissue. It also affords a stronger bony base.

Front 11

What is a cervical embrasure?

Back 11

A void cervical to the contact area

Front 12

When papillary tissue recedes, what goes away along with it?

Back 12

Gingiva, supporting bone, periodontal ligaments, connective tissue, and vascular tissue.

Front 13

What is another name for a cervical embrasure?

Back 13

Gingival embrasure

Front 14

Open contacts can lead to what?

Back 14

Periodontal disease and dental caries

Front 15

What is it called when an open contact is especially wide?

Back 15

A diastema

Front 16

Is it preferable to have a large or small open contact?

Back 16

Large, because food can easily be lodged between small open contacts.

Front 17

What do we call the spaces between teeth that are occlusal to contact areas?

Back 17

Embrasures

Front 18

What acts as a sluiceway or spillway that allows foods to escape between teeth?

Back 18

Embrasures

Front 19

The contact areas of anterior teeth are located _______ the incisal surfaces of the teeth.

Back 19

Closer to

Front 20

The more posterior the tooth, the more ________ the contact area. The distal of the maxillary _______ are the exception, as their contact area is in the middle third of the tooth.

Back 20

cervical; canines

Front 21

The contact areas are slightly ______ to the center of the tooth.

Back 21

Buccal

Front 22

Do anterior or posterior teeth have wider embrasures when compared with the occlusocervical dimensions of the tooth?

Back 22

Posterior

Front 23

Are the buccal or lingual embrasures wider in posterior teeth?

Back 23

Buccal

Front 24

Are the buccal or lingual embrasures wider in posterior teeth?

Back 24

Buccal

Front 25

What is the function of facial and lingual contours?

Back 25

They afford the correct amount of frictional massage to the gingiva but didn't food off of teeth and against gingiva at a proper angle.

Front 26

Generally speaking, the location of the buccal height of contour of anterior and posterior teeth is always the same. Where is it located?

Back 26

The cervical 1/3 of the tooth

Front 27

The lingual crest of curvature of posterior teeth is located at the _______.

Back 27

Middle third

Front 28

What does crest of curvature refer to?

Back 28

It is the same as height of curvature, but is used when referring to the widest part of the crown of the tooth.

Front 29

In the normal adult with permanent dentition, the gingival crest is ______ to the buccal and labial contours of all maxillary teeth, and the _______ contours of anterior teeth.

Back 29

cervical; lingual

Front 30

What does the free gingiva of the carnival crest cover?

Back 30

The cervical enamel of the tooth.

Front 31

The normal amount of curvature found on most facial contours is approximately ______.

Back 31

0.5mm

Front 32

The normal amount of curvature found on most facial contours is less ______ on anterior teeth.

Back 32

lingual

Front 33

Is the amount of curvature on the lingual side great on the maxillary or mandibular posterior teeth?

Back 33

The curvature is greater on the mandibular teeth.

(Approximately 0.5mm for maxillary, and 1mm for mandibular.)

Front 34

The height of contour refers to what?

Back 34

The buccal or lingual width of a tooth.

Front 35

The mesial or distal crests of curvature of the tooth, where it contacts adjacent teeth is a ___________.

Back 35

Contact area

Front 36

What is the cementoenamel junction (CEJ) ?

Back 36

The curvature of the tooth where it contacts adjacent teeth.

Front 37

Do the crowns of the anterior or posterior teeth show greater curvature at the cervical line?

Back 37

Anterior

Front 38

The greater curvature at the cervical line on anterior teeth provides what?

Back 38

More anchorage and support

Front 39

The periodontal ligament attaches _____ to ______.

Back 39

cementum; bone

Front 40

As a general rule, the curvature of the CEJ is usually about ______ on the distal surface than on the mesial.

Back 40

0.5 mm less

Front 41

Which teeth show the greatest amount of curvature?

Back 41

The maxillary anterior teeth.

Front 42

The more anterior the tooth the ______ the curvature on the cervical line.

Back 42

Greater

Front 43

The more anterior the tooth the ______ the curvature on the cervical line.

Back 43

Greater

Front 44

Is the mesial or distal curvature of the tooth greater?

Back 44

The mesial is greater.

Front 45

The mesial curvature of posterior teeth averages ______, and the distal curvature is generally less than _______.

Back 45

1mm; 0.5mm

Front 46

What characteristics of teeth and surrounding tissues contribute to their self-cleaning abilities?

Back 46

Enamel and shape of the crown

Front 47

Deflection of food at an extreme angle could cause what?

Back 47

Recession

Front 48

What is an overhanging restoration?

Back 48

When the margin of the filling or restoration extends far beyond the tooth.

Front 49

An overhanging restoration can cause what problems? Why?

Back 49

It can cause damage to gingival tissue, alveolar bone lose, and dental caries.

It allows buildup of plaque, bacteria, and food.

Front 50

What does alignment refer to?

Back 50

The position of teeth in the jaw

Front 51

What are the benefits of proximal contacts?

Back 51

1) They prevent food from packing between teeth.

2) Offer support and anchorage to teeth.

Front 52

Proximal contact areas are located at the _______ portion and the _______ curvature.

Back 52

widest; greatest

Front 53

A contact point refers to ________, whereas a contact area refers to _______.

Back 53

proximal contact; occlusal contact

Front 54

____________ are spaces between the teeth formed bythe bone on one side and the proximal surfaces and their contact area on theother side.

Back 54

Interproximal spaces

Front 55

Interproximal spaces are wider cervically or occlusally?

Back 55

cervically

Front 56

The more _______ the tooth, the more cervical the location of its contact area.

Back 56

posterior

Front 57

Contactareas of posterior teeth are nearer the _______ of the teeth.

Back 57

middle third

Front 58

Contact areas of posterior teeth are ______ to the center of the teeth.

Back 58

buccal

Front 59

Lingual embrasures are _____ than facial embrasures.

Back 59

wider

Front 60

Teeth are narrower on the lingual side or facial side?

Back 60

lingual side

Front 61

The purpose of contours is to _________.

Back 61

direct food off the teeth

Front 62

The contour on the lingual surface allows what?

Back 62

The tongue to restagainst the tooth to promote the most efficient self-cleaning.

Lingual Contour= efficient self-cleaning

Front 63

What is the purpose of the facial height of contour?

Back 63

It allows for maximum cleaning of lips and cheeks.

Facial Height of Contour= cleaning of lips & cheeks

Front 64

Buccal height of contour (anterior AND posterior)= cervical third

Lingual height of contour (anterior) = cervical third

Lingual crest of curvature (posterior)= middle third

Back 64

.

Front 65

All buccal and lingual contours are at the cervical third, except for _______.

Back 65

the lingual crest of curvature of posterior teeth.

(middle third)

Front 66

The normal curvature of all facial contours is approximately ______.

Back 66

0.5 mm

Facial Contours= 0.5 mm

Front 67

The curvature of lingual contours for posterior teeth are 0.5mm for ________ teeth, and 1mm for _____ teeth.

Back 67

maxillary; mandibular

Posterior

Maxillary= 0.5mm

Mandibular= 1mm

Front 68

All facial and lingual contours are 0.5mm, except for ___________.

Back 68

The lingual contour on mandibular posterior teeth

Front 69

The periodontal attachment follows the cervical line, and connects the gingiva and the _______.

Back 69

cementum

Front 70

The periodontal ligament attaches the cementum to the _____.

Back 70

bone

Front 71

Do anterior or posterior teeth have greater curvature of the CEJ?

Back 71

Anterior, especially maxillary anterior.

Front 72

The curvature of the CEJ is 1mm less on the _____ surface than on the _____ surface.

Back 72

distal; mesial

Front 73

How can pits and fissures be reduced?

Back 73

It can be

1) polished out (odonectomy or odontoplasty)

2) filled in

3) covered with sealant

Front 74

The periodontium is composed of what?

Back 74

- gingiva

- alveolar mucosa

- cementum

- periodontal ligament

- bone

Front 75

What do contact areas protect and prevent?

Back 75

They protect gingiva and prevent food impaction.

Front 76

What causes an embrasure?

Back 76

gingival recession