ON FINAL: Esthetic Principles for Fixed Prosthodontics Flashcards
What does esthetics refer to?
-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
What do you consider for facial esthetics?
- Occlusal Vertical Dimension
- Facial lower 1/3
- Lip Support
— Rickett’s “E” plane
— Nasolabial Angle
What do you consider for Dentofacial esthetics?
- Smile Analysis
- Anterior Tooth Display
- Dental Midline
- Occlusal Plan
What do you consider for Dentofacial esthetics?
- Width:Height proportion
- Tooth:Tooth Proportion
- Gingiva
— Papilla height
— Zeinth positions - Embrasures
- Tooth Long axis
What is the width corresponding to the canines?
canine width
What “should” line up down the front of the face?
inner canthus, ala of nose, canine position
What is the rickett’s E plane?
Fundamentally the “E” plane is simply a line drawn from the tip of the nose to the tip of the chin. The key assessment was to look at how the upper and lower lip related to that line.
Dr. Ricketts felt that to have a pleasing facial profile, in the average Caucasian face, the lower lip would be ____ mm behind the line, and the upper lip ____ mm behind the line
2 mm
4mm
An example of how the “E” plane would be used is a patient with significant ________ of both upper and lower arches.
crowding
If the lower lip is 6 mm behind the “E” plane, the decision would be to…
align the teeth and expand the arch, moving the anterior teeth and lips.
If the lips in profile were on or in front of the “E” plane, the decision would be…
extraction and anterior retraction
What is the nasolabial angle?
- Greater than 90 degrees = Convex
- Less than 90 degrees = Concav
What are the width/height ratios of the central incisors?
-Ideal width 8.5 - 9.0mm
-Ideal height 10.5 – 11mm
A “pleasing” relationship between width and height (length) is between ________%
Width divided by height (length)
75% - 85%
So, when length has been lost, how might you determine what an esthetic length needs to be if you are crowning these anterior teeth?
Knowing the width, you can determine the most esthetic length.
Ideally, there is a slight ____________ of the long axis of the teeth toward the midline
inclination
Lingual inclination of posterior teeth can create “negative space” creating a noticeable and unesthetic space or lack of space when a person smiles. This is called the…
buccal corridor
Interproximal contacts are situated more ___________ from anterior to posterior
cervically
Embrasures become _______ from anterior to posterior
larger
Contact dimension between:
Central’s
Centrals and Laterals
Laterals and Canines
50:40:30 Rule