Ortho - Lecture 1: History of Ortho Flashcards
Orthodontists deal with facial _________ and _______ and their undesirable effects on oral function and esthetics
growth; form
Orthodontists control/modify some aspects of _________
growth
Orthodontists adjust movement of _____ to mask undesirable facial features
jaws
T/F: Malocclusions are not life threatening, only a few are physically disabling
True
What do some malocclusions interfere with?
Oral hygiene
Oral function
Mastication
Speech
Considered the “father of orthodontics”
Norman Kingsley
What type of appliances did Norman Kingsley invent?
Cleft palate correction
Who is associated with a technique known as “jumping the bite with the use of a bite plate”?
Norman Kingsley
Considered the “father of modern orthodontics”
Edward Angle
What type of appliances did Edward Angle invent?
Malocclusion correction
Edward Angle’s final appliance was the ___________ system, which most modern systems are derived from
Edgewise
Edward Angle believed if you place teeth in alignment, the _______ will follow (ext of teeth was taboo)
jaws
Who established the first orthodontics school in 1900?
Edward Angle
What was the first recognized specialty in dentistry?
Ortho!
Angle’s postulate was that which teeth were the key to occlusion?
Maxillary 1st molars
Describe Angle’s postulate
MB cusp of max 1st molar occludes in B groove of mand 1st molar
The line of occlusion should follow a __________ curve
catenary
Which line of occlusion?
Curve should pass through the central fossa of posterior teeth and lie along cingulum of anterior teeth
Maxilla
Which line of occlusion?
Same line runs along buccal cusps and incisal edges of anterior teeth
Mandible
What type of malocclusion?
Normal relationship of 1st molars; line of occlusion incorrect due to malposed teeth, rotations, etc
Class I malocclusion
What type of malocclusion?
Mandibular 1st molar is distal to maxillary 1st molar; maxillary canines are mesial to mandibular canines; line of occlusion not specified
Class II malocclusion
What type of malocclusion?
Protruding maxillary incisors; associated with underdeveloped lower jaw, protrusive upper jaw, narrow arch, flared lower incisors
Class II Division 1 malocclusion
What type of malocclusion?
Retruding or bunched maxillary incisors; associated with underdeveloped lower jaw, deep bite, laterals/canines in labioversion while centrals are upright with minimal overjet
Class II Divison 2 malocclusion
What type of malocclusion?
Mandibular 1st molar is mesial to maxillary 1st molar by 1/2 cusp width or more; maxillary canines are distal to mandibular canines; line of occlusion not specified
Class III malocclusion
What type of malocclusion?
Overdeveloped lower jaw; underdeveloped/constricted upper jaw; upright lower incisors; flared upper incisors
Class III malocclusion
Pros of Angle’s classification (3)
Simple, widely accepted, has stood test of time
Cons of Angle’s classification (5)
Focuses only on dentoalveolar relationships
Does not recognize skeletal differences
Ignores esthetics
Does not include vertical/transverse dimensions
Does not recognize tooth size differences
Angle’s classification has been extended to include _________ patterns now
skeletal
What modern classification?
Comprised of 5 main characteristics, which leads to development of a diagnosis:
Intra-arch alignment
Soft tissue profile
Transverse plane of space
Sagittal (A-P) plane of space
Vertical plane of space
Ackermann and Proffit classification
Evaluation of the facial profile helps anticipate the __________ and __________ relationships
skeletal; occlusal
