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Fixed Pros II > Esthetics > Flashcards

Esthetics Flashcards

1
Q

esthetics refers to:

A
  • the philosophy study of beauty and taste
  • the perception of the beautiful in nature and art
  • relating to the study of the principles of beauty
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2
Q

what are the 3 main categories of esthetics

A
  • facial esthetics
  • dentofacial esthetics
  • dental esthetics
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3
Q

what is included in facial esthetics

A
  • occlusal vertical dimension
  • facial lower 1/3
  • lip support: rickett’s E plane and nasolabial angle
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4
Q

what is included in dental esthetics

A
  • width:height proportion
  • tooth:tooth proportion
  • gingiva: papilla height and zeinth positions
  • embrasures
  • tooth long axis
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5
Q

what is included in dentofacial esthetics

A
  • smile analysis
  • anterior tooth display
  • dental midline
  • occlusal plane
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6
Q

what does intercanine width correspond to

A

inner canthus and ala of nose

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7
Q

what is the E plane and what does it assess

A
  • a line drawn from the tip of the nose to the tip of the chin
  • assesses how the upper and lower lip related to that line
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8
Q

what is the ideal Ricketts face

A

the lower lip would be 2mm behind the line and the upper lip 4mm behind the line with variations being normal for different ethnic backgrounds but with some commonalities applying to all patients

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9
Q

the closer the lips are to the E plane:

A

the lips and teeth will dominate the smile with the nose and chin appearing weak

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10
Q

the farther behind the plane the lips are:

A

the more likely the nose and chin will dominate the smile

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11
Q

what constitutes concave and convex nasolabial angle

A
  • convex: greater than 90 degree
  • concave: less than 90 degrees
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12
Q

what is the ideal width to height ratio for central incisors

A
  • ideal width: 8.5-9.0mm
  • ideal height: 10.5 - 11mm
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13
Q

what is a “pleasing” relationship between width and height of central incisors

A

between 75-85%

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14
Q

for the proportion of central incisors:

A

the width is divided by the height

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15
Q

what other factors impact length decision for central incisors

A
  • wear
  • posterior occlusal support
  • protrusive
  • canine guidance
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16
Q

where is there inclincation

A

ideally the long axis of the teeth toward the midline

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17
Q

the incisal and occlusal segments of the facial surfaces have ____ inclincation

A

lingual

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18
Q

lingual inclination of posterior teeth can create ______ creating a noticeable and unesthetic space or lack of space when a person smiles

A

negative space

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19
Q

interproximal contacts are situated more ____ from anterior to posterior

A

cervically

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20
Q

embrasure become larger from_____

A

anterior to posterior

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21
Q

what is the 50:40:30 rule

A

contact dimension between: centrals, centrals and laterals, and laterals and canines

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22
Q

most gingival papilla proportions are around _____ of the tooth length

A

40%

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23
Q

what can impact embrasure and papilla height

A

shape of teeth

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24
Q

describe the gingival zenith of central incisors and canines

A

they are in a line parallel to the interpupillary line

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25
Q

describe zenith of centrals

A

distal to tooth vertical midline

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26
Q

describe zenith of laterals

A

distal to tooth vertical midline

27
Q

describe zenith of canines

A

in line with vertical midline

28
Q

what is the golden proportion

A

a comparative ratio used to determine sizes of maxillary anterior teeth

29
Q

what is the golden proportion for central, lateral and canine

A
  • central: 9mm
  • lateral: 9 x 0.618 = 5.56mm
  • canine: 5.56 x 0.618 = 3.44mm
30
Q

what is the alternative tooth proportion ratio for central, lateral and canine

A
  • central: 100%
  • lateral: 65%
  • canine: 85%
31
Q

central incisor is _____ width to length

A

79%

32
Q

what are the 3 common mistakes made when replacing maxillary anterior teeth

A
  • flat facial aspect of the central incisors
  • lateral incisor is too wide OR lateral incisor is too narrow
  • flat incisal plane
33
Q

if centrals are widened they will most likely need to be:

A

elongated for proportion

34
Q

what characteristics do we examine in analyzing a persons smile-

A
  • smile line: can be high, average, low
  • parallelism of maxillary incisal curve with lower lip
  • position of the incisal curve relative to touching the lower lip
  • the number of teeth displayed in the smile
35
Q

what is included in a smile analysis

A
  • overall length of maxillary teeth are displayed
  • interproximal gingiva shows
  • incisal curvature parallels the lip curvature
  • incisal curvature totally or slightly touches lower lip- within 2mm
  • 6 maxillary anterior and 2nd premolars are displayed
  • maxillary midline coincides with a harmonious balance of smile
36
Q

describe the incisal curve

A
  • incisal edges of the maxillary anterior teeth
  • parallels the inner curvature of the lower lip and interpupillary line
  • perpendicular to the facial/dental midline
37
Q

describe the incisal edge position in the incisal curve

A
  • central incisors and canines lie on the same curved line
  • incisal edges of laterals are 1mm short of this line
  • follows curve of lower lip
  • incisal curve touches the lower lip or within 2mm
38
Q

describe a full smile

A

lip moves to incisor tooth-gingiva interface
- 80% of young people show entire length of central incisors

39
Q

describe the low lip line

A

less than 75% incisors showing with no gingival display

40
Q

women have high smile line ____ as often as men

A

twice

41
Q

what is another name for maxillary excessive gingival display

A

gummy smile

42
Q

what are the reasons for maxillary excessive gingival display

A
  • hyperactive lip
  • vertical maxillary excess
  • altered passive eruption
  • dentoalveolar extrusion
43
Q

what is the normal movement of the upper lip

A

6-8mm

44
Q

what is the hyperactive lip movement

A

up to 2 times the normal lip movementw

45
Q

what is vertical maxillary excess

A

maxilla height is higher than normal
- skeletal issue

46
Q

what is dentoalveolar extrusion

A

over eruption of gingiva and bone due to conditions like tooth wear

47
Q

what is altered passive eruption

A

a condition in which the free gingival margin fails to recede during tooth eruption to a level apical to the cervical convexity of the clinical crown

48
Q

what is the average length of maxillary incisor exposed at rest for females and males

A
  • females: 3.5mm
  • males: 2.0mm
49
Q

what is the average length of maxillary incisor exposed at rest for younger persons and older persons

A
  • younger: 3.4mm
  • older: 1.25mm
50
Q

where do “F” and “V” sounds touch and what is this used to determine

A

inner edge of vermillion border on the wet-dry line
- area used to determine position of incisal 1/3 of anterior maxillary incisors

51
Q

where does “S” sound touch and what is it used to determine

A
  • mandibular incisal edge is 1mm behind and below maxillary incisal edge
  • used to determine vertical dimension of speech
52
Q

describe the dental midline

A

the maxillary midline coincides with the facial midline and is perpendicular to the interpupillary line

53
Q

matching the maxillary midline to _____ is preferred but not always possible

A

mandibular midline

54
Q

a maxillary midline deviation of ____ was necessary before ortho rated it significantly less esthetic than the others

A

4mm

55
Q

orthodontists, general dentists and lay people can identify a ___ discrepancy in crown angulation

A

2mm

56
Q

what is campers plane

A

a plane extending from the inferior border of the ala of the nose to the inferior point on the border of the tragus

57
Q

the _______ typically coincides with campers plane

A

dental occlusal plane

58
Q

what is the interpupillary line a reference for

A

incisal plane

59
Q

the more distal in the arch, the ________ variations become

A

less noticeable

60
Q

leaving a diastema is a:

A

personal preference

61
Q

to treat a diastema, consider:

A

orthodontic movement as a conservative treatment first

62
Q

where can left over space be hidden after doing crowns

A

behind canines

63
Q
A

Fixed Pros II (13 decks)

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