Lecture 7

Question 1

Cosmetics Vs Aesthetics

Answer 1

Aesthetics is something that fits into the environment

Cosmetics is more of changing the environment

Question 2

refers to any dental work that improves the appearance of teeth, gums and/or bite

Answer 2

cosmetic dentistry

Question 3

formal study of the principles of art and beauty

Answer 3

aesthetics

Question 4

3 classes of lip line:
High
Medium
Low

Answer 4

High: A 2mm or above display of gingival tissues
Medium: Gingival margin and the lip line is congruent
Low: A 2mm or more below the cervical line of upper central incisors

Question 5

Relationship between the height and width of teeth in dentistry

Answer 5

The Golden Proportion

Question 6

Width/Height Ratio

Central incisor

Answer 6

75-80%
>80% too short
<75% too long

Question 7

Smile Design

Ideal central width
Ideal central length
Ratio:

Answer 7

width 8.5mm
length 11mm
ratio: 77%

Width remains constant with wear

Question 8

Male vs female teeth

Answer 8

male usually flatter with square edges

female usually rounded and smaller

Question 9

Incisal embrasures?

Answer 9

should follow a natural and progressive INCREASE in size from the central to the cuspid

Question 10

Location of the contact point to the alveolar bone was less than or equal to 5mm

Answer 10

papilla was present in 98% of the times

While at 6mm it dropped to 56% and at 7mm only present 27%

Question 11

Contact points?

Answer 11

contacts between teeth should go more APICAL the further back in the arch you go

Question 12

axial inclination

Answer 12

all teeth should have a mesial inclination - point toward the belly button

more exaggerated as we go toward posterior

subtle on centrals and less so on canines

Question 13

Apex of gingiva?

Answer 13

apex of gingiva should be towards distal on canines and centrals

apex of gingiva should be towards mesial on the laterals

Question 14

Central incisor features

Answer 14

total symmtery
midline V with line angles
defined grind zone
mesial inclination
longer than laterals

Question 15

Lateral incisor features

Answer 15

set lingaul to central incisor plane
line angles more toward center of tooth
larger grind zone
mesical inclination
slightly shorter than centrals

Question 16

Tooth symmetry

Answer 16

central incisors are the most important teeth for smile design. Need to be symmetric and mid-line needs to be correct

most beautiful smiles have some asymmetry in the position of lateral incisors

most smiles become more asymmetric in tooth position as the patient gets older

Question 17

gingival symmetry

Answer 17

gingival border follows the upper lip
canines and centrals should be SAME HEIGHT
laterals should be slightly more incisal

Question 18

Reduction on crowns

Answer 18

1.5 mm axial reduction
2mm incisal reduction

3 planes of reduction gingival-incisal. be sure incisal edge of prep is LINGUAL to adjacent unprepped teeth

3 planes of reduction mesio-distally

Question 19

Fully Prepped Veneers

Answer 19

reduction will be related to tooth position
preserve enamel!!
prep must break interpoximal contact
facial reduction ~0.7mm
incisal is 1.5 to 2 mm reduction with BUTT JOINT MARGIN

if closing a diastema the prep cannot end supra-gingivally. The wider the diastema the more sub gingival your prep has to be in order to avoid black triangles