Orofacial Complex: Form and Function Flashcards Preview

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Flashcards in Orofacial Complex: Form and Function Deck (52):
1

shape plays an important part of function with the teeth. what are 4 components of shape and function?

  1. speech, jaw function
  2. arch form
  3. temporomandibular joint function
  4. integration of form, function, and esthetics

2

form has to do with the biomechanical contributions in maintaining _____

function

3

"form follows function" is a relationship between esthetics and optimal occlusion. what are 2 components of esthetics and optimal occlusion?

  1. physical forces and periodontal ligament
  2. TMJ function

4

what is the significance of the curve of spee in relation to "form follows function"?

proper articulation of teeth

5

what is the definition of contact areas?

proximal heights of contour of the mesial or distal surface of the tooth that touches its adjacent tooth in the same arch

6

T or F:

proximal contact areas are points, not areas

false:

they are areas, not points

7

can excess occlusal forces result in loss of supporting tissues?

yes

8

proper proximal contact areas prevent food from packing between the teeth, which may become ______

pathologic

9

proper proximal contact areas provide _____ for arch

stabilization

10

proper proximal contact areas must be observed from which 2 views?

facial and occlusal

11

proper proximal contact areas provide support for all teeth with the exception of which?

distal of 3rd molars

12

____ and ____ do not drift distally due to angulation of occlusal surfaces and roots

2nd and 3rd molars

13

pathologic conditions resulting from lack of proper proximal contact areas include what?

  • gingivitis
  • bone loss with attachment loss (periodontitis)

14

what is the point contact?

  • initially, as teeth erupt, the teeth contact each other at a specific point (the point contact)
  • with the passage of time, physiologic tooth movement causes frictional wear enlarging the contact point to the contact area

15

proper contact preserves the ____ and ____ of the arch by maintaining normal mesiodistal relationship of teeth

stability and integrity

16

proper contact prevents food impaction _____

interdentally

17

proper contact protects the soft tissue from ______

periodontal disease

18

proper contact conserves the teeth from ____

proximal caries

19

premature restorative failure does not occur if ____ ____ ____ is present

stable proximal contact

20

interproximal spaces are ____ in shape to allow for ____ _____. 

  • triangular
  • gingival papillae

21

in interproximal spaces, the base of the triangle is the ____ and the apex is the _____

  • alveolar process
  • contact area

22

T or F:

size and shape of interproximal spaces vary with individual teeth

true

23

normally, there will be ____ between CEJ and crest of alveolar bone

1.0-1.5mm

24

T or F:

surface keratinization and dense elastic fibers maintain ginngival tissues form more trauma from mastication and bacterial invasion

true

25

____ of the teeth at the cervix and ____ of roots allow for the proper anchoring of the teeth and tissues

  • narrowing
  • tapering

26

what are embrasures?

curvatures adjacent to the contact areas

27

what are the 5 types of embrasures?

  1. labial interproximal
  2. buccal interproximal
  3. lingual interproximal
  4. incisal
  5. occlusal

28

identify the following 3 structures

Q image thumb

A image thumb
29

what is the definition of contours?

denotes some degree of convexities and concavities on the facial/buccal and lingual surfaces of all the teeth that affords protection to the supporting tissues during mastication

30

buccal and lingual contours _____ food away from _____ during mastication

  • deflect
  • gingival margins

31

the height of contour of the facial surface is where?

cervical 1/3 of all teeth

32

the height of contour of the lingual surface is where?

  • cervical 1/3 of incisors and canines
  • middle 1/3 of premolars and molars

33

under-contouring can lead to ____

food impaction

34

what are 3 main types of contours?

  • faciolingual contour
  • proximal contour
  • occlusal contour

35

what is the result of over-contouring restorations?

deflection of food away from the gingiva, causing poor gingival stimulation

36

what is the height of epithelial attachment?

curves of the cervical lines

37

epithelial attachment seals the ____ of the tooth

soft tissue

38

T or F:

height of epithelial attachment can be adjusted to different conditions and changes

true

39

height of epithelial attachment is vulnerable to ____ caused mostly by careless treatment

injury

40

injury to height of epithelial attachment can create an ongoing pathologic condition of what?

more breakdown

41

height of the gingival tissue _____ and ____ is directly related to the height of attachment

mesially and distally

42

normal height of epithelial attachment follows the _____, assuming ____

curvature of the cervical line, assuming normal tooth alignment and contact with other teeth

43

extent of curvature of cervical line depends on _____ above the crown cervix

height of contact area

44

extent of curvature of cervical line depends on the ___ and ___ of the crown labiolingually and buccolingually

size and diameter

45

posterior teeth have ____ accentuated cervical line curves

less

46

what is the location of contact in anterior teeth?

incisal 1/3

47

what is the location of contact in posterior teeth?

junction of incisal and middle 1/3

48

teeth show convexities on the ___ and ___ surfaces

distal and mesial

49

the area with maximal convexity on the proximal surface is called the _____

proximal height of contour

50

the proximal height of contour is responsible for the creation of what?

  • proximal contact
  • embrasure space

51

what 2 ways does tooth form relates to the form of supporting structures?

  • food impaction
  • trauma to gingival tissues

52

what are the 5 considerations of fundamental curvatures related to restorations?

  1. proximal contacts
  2. interproximal spaces
  3. embrasures
  4. labial and buccal contours at cervical 1/3 and lingual contours
  5. curvatures of cervical lines on mesial and distal surfaces