ortho final Flashcards
(33 cards)
what does the orthodontics do ?
1- deals with facial growth form and their undesirable effects on oral function and facial esthetics
2- control or modification of some aspects of growth
3- movement of jaws to mask undesirable facial features
t/f
Malocclusions are not life threatening, only a few are physically disabling.
true
Some malocclusions interfere with:
Oral function
Hygiene
Impair mastication
Impair speech
Father of Orthodontics
Norman Kingsley
Father of Modern Orthodontics
Edward H. Angle
class 1
Angle’s Classification
Additionally, Angle described arch form based on the _________
Line of Occlusion
“Line of Occlusion”
maxilla
The curve should pass through the central fossa of the posterior teeth and lie along the cingulum of the anterior teeth
“Line of Occlusion”
mandible
The same line runs along the buccal cusps and incisal edges of the lower anterior teeth
-Angle Class I malocclusion
-Normal relationship of the first molars
-The Line of Occlusion is incorrect because of malposed teeth, rotations, or other causes.
-Angle Class II malocclusion
-Lower molar distally positioned relative to upper molar
-The upper canines are mesial to the lower canines
-Line of occlusion not specified
-Angle Class II malocclusion
-Division 1:
Protruding
maxillary incisors. Maybe associated
with the following: Underdeveloped
lower jaw
Protrusive upper jaw Narrow arch form Flared lower incisors
Division 2:
Retruding or bunched maxillary incisors
Maybe associated with
the following: Underdeveloped lower jaw Deep bite
Laterals or Canines tend to
be in labioversion while the centrals are upright with minimal overjet
Angle Class III Malocclusion
The mesialized relationship of the lower first molar to the upper by one-half cusp width or more
The upper canines are distal to the lower canines
Line of Occlusion not specified
Angle Class III Malocclusion
associated with what?
Overdeveloped lower jaw Underdeveloped and
constricted upper jaw Dental compensations
include:
Upright lower incisors Flared upper incisors
Criticism of Angle
The Pro’s
* Simple
▫ Widely accepted
Has stood the test of time ▫
Criticism of Angle
The Con’s
-Focuses only on the dentoalveolar relationships
-Fails to recognize skeletal differences
- Ignores Facial esthetics
- Does not include the vertical
and transverse dimensions
- Does not recognize tooth size
differences
Ackermann and Proffit
Modern orthodontic classification is comprised of five main characteristics:
1-Intra-arch alignment
2-Soft tissue profile
3-Transverse plane of space
4-Saggital or A-P plane of space
5-Vertical plane of space
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Evaluating the facial profile helps with what?
Evaluation of the profile will help anticipate the skeletal and occlusal relations.
what is the goal of the orthodontic clinical exam & purpose ??
-to recognize ortho problems that should ideally be addressed
-to develop a diagnostic database
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