Elements of Smile Design

Question 1

what is involved in the esthetic analysis

Answer 1

• facial symmetry
• smile symmetry
• occlusion
• tooth shape and color

Question 1

what type of data should be collected

Answer 1

• preclinical interview
• intra-oral photography
• diagnostic casts with facebow transfer
• comprehensive dental exam
• esthetic analysis

Question 2

what is observed in facial symmetry

Answer 2

• inter pupillary line
• midline axis
• commissural line
• occlusal plane line

Question 3

what are used for the anatomic midline

Answer 3

cupids bow and philtrum

Question 4

the dental midline refers to:

Answer 4

the vertical contact interface between two maxillary centrals

Question 5

the dental midline should be coincident with:

Answer 5

the facial midline axis

Question 6

the dental midline is not noticeable by most people up to ____ as long as it is parallel to the midline axis

Answer 6

4mm

Question 7

max and mand dental midlines do not coincide in about _____ of cases

Answer 7

75%

Question 8

canted dental midline is _____ esthetically unpleasant and more noticeable than shifted midline

Answer 8

more

Question 9

what is observed in smile symmetry

Answer 9

• buccal corridor
• smile line
• tooth reveal
• gingival height and position

Question 10

smile line influences the final configuration of:

Answer 10

• the incisal edge position
• crown form
• length of the maxillary anterior teeth

Question 11

acceptable results in smile symmetry occur when:

Answer 11

• the maxillary incisal edges are parallel to the line of the lower lip
• the lateral incisors are 0.5mm to 1.5mm above the lower lip line
• the centrals and cuspids will approximate the lower lip near or at the vermillion border

Question 12

what is the buccal corridor

Answer 12

the area distal to the canines between the buccal surfaces of the posterior teeth and the buccal mucosa. it enhances or detracts from symmetry

Question 13

what factors are assessed in the buccal corridor

Answer 13

• negative space
• canine prominence
• value/color of premolars
• position of premolars
• tone of facial muscles

Question 14

what is evaluated in tooth reveal

Answer 14

evaluation of upper lip line, lip movement (hyper vs hypo) and position (high vs low) and its effect on tooth exposure
- line connecting papillae will ideally follow upper lip contour
- exposed tooth at rest can impact perceived age

Question 15

youthful smile shows ____ of centrals

Answer 15

2-4mm

Question 16

adults show ____ of tooth

Answer 16

2mm

Question 17

which gender shows more tooth at rest

Answer 17

females

Question 18

what is the lip line

Answer 18

the amount of vertical tooth exposure in smiling
- the height of the upper lip relative to the maxillary central incisors

Question 19

what is a normal lip line

Answer 19

more than 75% of central incisors - 2mm of gingival display

Question 20

what is a low lip line

Answer 20

less than 75% of central incisor display during smiling

Question 21

what is a high lip line

Answer 21

more than or equal to 3mm gingival display during smiling

Question 22

what does upper lip form refer to

Answer 22

the curvature of the upper lip during smiling

Question 23

what is the upper lip form assessed by

Answer 23

the position of the philtrum in relation to the commissural ine

Question 24

describe the ideal gingival height and position

Answer 24

• the gingival zenith of the centrals should be symmetrical to one another and relatively equal in height to the canines
• the gingival zenith of the laterals should be equal to or slightly incisal to the central incisor gingival level
• zenith points are usually slightly lateral to midline axis of the tooth

Question 25

what are the types of guidance in occlusion

Answer 25

• anterior or group function; shallow vs deep

Question 26

what should be considered for parafunctional habits in occlusion

Answer 26

consider hard or soft appliances

Question 27

what are the location of occlusal contacts

Answer 27

• class III
• deep bite
• open bite
• cross bite

Question 28

what are the size and proportion considerations for tooth shape

Answer 28

• large vs small
• tall vs short teeth
• width to length proportions within the same tooth or among adjacent teeth

Question 29

what are the types of tooth form

Answer 29

square, ovoid, tapered or combinations

Question 30

what are the texture and surface considerations for teeth

Answer 30

smooth vs textured eg prominent MR and perikaymata

Question 31

what are the width to length proportion of max CI

Answer 31

77-86%
- CI is 2-3mm wider than LI
- CI is 1-1.5mm wider than canines
- CI and canine touch OP while LI is 0.5-1mm shorter giving the characteristic “Gull” shape of the incisal edges of anterior teeth

Question 32

what are the color considerations

Answer 32

• value: grey scale or brightness
• chroma- saturation or intensity
• hue- gradation or variety of a color

Question 33

what are the examples of value

Answer 33

• Vita Classic: light to dark B1-C4
• Vitapan 3D: light to dark: 0M1 to 4M4

Question 34

mature patients have a _____ saturation

Answer 34

high

Question 35

young patients have a _____ satuaration

Answer 35

low

Question 36

hue can be affected by colors from:

Answer 36

lipstick

Question 37

what are the 3 hues

Answer 37

A, B, D in USA with more C category in europe

Question 38

_____ have the highest value

Answer 38

centrals

Question 39

_____ have the lower value and greater chroma

Answer 39

cuspids