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Dental Anatomy > Orofacial Complex: Form and Function > Flashcards

Orofacial Complex: Form and Function Flashcards

1
Q

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

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

form has to do with the biomechanical contributions in maintaining _____

A

function

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3
Q

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

A
  1. physical forces and periodontal ligament
  2. TMJ function
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4
Q

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

A

proper articulation of teeth

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5
Q

what is the definition of contact areas?

A

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

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6
Q

T or F:

proximal contact areas are points, not areas

A

false:

they are areas, not points

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7
Q

can excess occlusal forces result in loss of supporting tissues?

A

yes

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8
Q

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

A

pathologic

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9
Q

proper proximal contact areas provide _____ for arch

A

stabilization

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10
Q

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

A

facial and occlusal

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11
Q

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

A

distal of 3rd molars

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12
Q

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

A

2nd and 3rd molars

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13
Q

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

A
  • gingivitis
  • bone loss with attachment loss (periodontitis)
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14
Q

what is the point contact?

A
  • 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
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15
Q

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

A

stability and integrity

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16
Q

proper contact prevents food impaction _____

A

interdentally

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17
Q

proper contact protects the soft tissue from ______

A

periodontal disease

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18
Q

proper contact conserves the teeth from ____

A

proximal caries

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19
Q

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

A

stable proximal contact

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20
Q

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

A
  • triangular
  • gingival papillae
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21
Q

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

A
  • alveolar process
  • contact area
22
Q

T or F:

size and shape of interproximal spaces vary with individual teeth

A

true

23
Q

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

A

1.0-1.5mm

24
Q

T or F:

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

A

true

25
Q

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

A
  • narrowing
  • tapering
26
Q

what are embrasures?

A

curvatures adjacent to the contact areas

27
Q

what are the 5 types of embrasures?

A
  1. labial interproximal
  2. buccal interproximal
  3. lingual interproximal
  4. incisal
  5. occlusal
28
Q

identify the following 3 structures

A
29
Q

what is the definition of contours?

A

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
Q

buccal and lingual contours _____ food away from _____ during mastication

A
  • deflect
  • gingival margins
31
Q

the height of contour of the facial surface is where?

A

cervical 1/3 of all teeth

32
Q

the height of contour of the lingual surface is where?

A
  • cervical 1/3 of incisors and canines
  • middle 1/3 of premolars and molars
33
Q

under-contouring can lead to ____

A

food impaction

34
Q

what are 3 main types of contours?

A
  • faciolingual contour
  • proximal contour
  • occlusal contour
35
Q

what is the result of over-contouring restorations?

A

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

36
Q

what is the height of epithelial attachment?

A

curves of the cervical lines

37
Q

epithelial attachment seals the ____ of the tooth

A

soft tissue

38
Q

T or F:

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

A

true

39
Q

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

A

injury

40
Q

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

A

more breakdown

41
Q

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

A

mesially and distally

42
Q

normal height of epithelial attachment follows the _____, assuming ____

A

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

43
Q

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

A

height of contact area

44
Q

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

A

size and diameter

45
Q

posterior teeth have ____ accentuated cervical line curves

A

less

46
Q

what is the location of contact in anterior teeth?

A

incisal 1/3

47
Q

what is the location of contact in posterior teeth?

A

junction of incisal and middle 1/3

48
Q

teeth show convexities on the ___ and ___ surfaces

A

distal and mesial

49
Q

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

A

proximal height of contour

50
Q

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

A
  • proximal contact
  • embrasure space
51
Q

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

A
  • food impaction
  • trauma to gingival tissues
52
Q

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

A
  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

Dental Anatomy (11 decks)

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