Ortho III - Crossbites Flashcards
App for pre adolescent for post crossbites (3)
W arch
Expansion Lingual arch or Modified W arch
Quadhelix
App for adolescent in post crossbites (2)
Jackscrew
Surgery
Quadhelix indication (2)
Expand palate
For thumbsucking
Most common cause of single tooth ant crossbite
Over retained deciduous
Tx for single tooth ant crossbite
Inclined planes
Anchorage in 4 perm md I
tx for 2 teeth ant crossbite
Inclined planes
Indication for multiple teeth ant crossbite (2)
Developing class III (mixed dent) Established skel class III
Tx for skel ant crossbite
Reverse pull headgear or chincup or refer
Tx for established skeletal class 3
Bilat sagittal osteotomy
Open bite aka
Nega overbite or vertical overlap
Most common cause of openbite
Thumbsucking
Buccinator mechanism
Buccinator
Orbicularis oris
Sup pharyngeal constrictor
Triad of thumbsucking
Duration
Frequency
Intensity
Most common cause of tongue thrusting
Thumbsucking
Types of swallowing
Infantile swallowing
Adult swallowing
Infantile swallowing used what CN
CN VII
Appliance of choice for tongue thrusting
Tongue crib
Appliance of choice to correct swallowing
Blue grass
Adult swallowing what CN
CN V
Recommended appliance thumb or finger sucking
Palatal crib
App for bruxism
Night guard or bite plate
App for hyperactive mentalis
Lip bumper
Plumber
Mayne
Denholtz
App for cheek or lip biting
Oral screen
App for tongue thrusting
Tongue crib
App for mouthbreathing
Oral vestibular screen or shield
Primate spaces of maxillary
Mandibular???
Mesial of canine
Distal of canine or mesial of primary molars
Normal age of px to have diastema
6 yrs old
When should you do diastema closure
When max canine erupts (11-12 yrs old)
Diastema >2 mm usually caused by _____
Supernumerary (mesiodens)
Pro
Primary determinant of diastema
Canines
Tx for an 8 yrs old px with 3 mm diastema
Take radiograph
Indirect bone formation
Endochondral bone formation
Direct bone formation
Intramembranous bone formation
Facing direction of growth where tension is
Deposition (+)
Facing away or for pressure
Resorption (-)
In piezoelectric theory
Deposition is ____
Resorption is _____
Negative
Positive
Principle wherein most facial bones are v shaped
Enlow’s V principle of growth
RODI
resorption- outer
Deposition - inner
Theory growth is controlled by genetic influence
Genetic theory
Theory where sutural growth is the proliferation of the CT bet two bones
Sicher’s theory
Theory wherein growth depends on cartilage and periosteum
Scott’s theory
In scott’s, ____ is the major contributor in maxillary growth
_____ for mandible
Nasal septum
Condylar cartilage
Examples of V shape bones (4)
Mandible
Maxilla
Palate
Orbit
Most accepted theory that form follows function
Moss theory aka functional matrices theory
He supports all theories
Van limborg’s theory
Servosystem theory
Petrovic’s theory
Growth center of nasomaxillary complex
Nasal septum
Growth direction of maxilla and md
Superior - posterior
Up pward backward
Growth displacement of mandible and maxilla
Downward and forward (inferior - anterior)
Area of cellular hyperplasia
Synchondroses
Intraoccipital synchondroses closes at
3-5 yrs old
Spheno occipital synchondroses closes at
Until 20 yrs old
Spheno ethmoidal closes at
6-7 yrs old
Intersphenoidal closes at
During birth
Growth center of mandible
Condylar cartilage
Site of bony deposition (4)
Condyle
Post border of ramus
Coronoid process
Tip of chin
Exception to anterior resorption in mandible
Tip of China
Resorption sites of mandible (2)
Ant border of ramus
Ant of md
Maxillary arch MD width
Mandibular arch ____
128 mm
126 mm
Establishment of order space
Width “breadth”
Length “depth”
Height
