Growth Predictions (FINAL) Flashcards
When there is a good ratio between the height & width of your face:
Normocephalic
When the length of the face in relation to the width of the face is much longer:
Dolychocephalic
Dolychocephalic patients tend to be harder to:
Predict growth
Brachiocephalic (patients that show with a class II division II malocclusion) meaning the:
Height to width ratio almost equal (B. Mlekus)
The easy predictability of growth is with ____ patients:
Normocephalic
Angle that is a good growth predictor as it tends to stay stable throughout life:
Mandibular plane angle
_____ axis is a good predictor of growth:
Y axis
Bjork studies states that:
“Patients tend to keep growth pattern ______”
Constant
(if you start as normocephalic you tend to stay normocephalic)
The mandible plane line creates an angle with:
The anterior aspect of the cranial base
The angle between the mandible plane line & the anterior aspect of the cranial base:
Mandibular plane angle
The more normal you mandibular plane angle is, the more:
Predictable the growth pattern will be
The from the cranial base, the face will grow:
Down & forward toward the maxilla
The center of the cranial vault:
Sella
in a class III malocclusion we try to minimize the growth of the _____ & maximize the growth of the _____
What about for class II?
Mandible; maxilla
Opposite
What can we assume if the MP angle & Y axis are not normal?
Altered growth pattern (NOT predictable)
With growth enhancement, we are typically looking at:
A class II or III malocclusion
For a class III malocclusion we try to increase _____ length
For a class II malocclusion we try to increase ____ length
Class III = Maxilla
Class II= Mandible
Can we modify growth?
Yes but not as much as we wish
Is chronological age a good predictor?
Yes- but take it with a grain of salt
When is the window of opportunity to modify growth?
9-13 years
Growth spurts for boys:
12-14 (until 17)
In order to modify growth, you must first:
Experience growth
What are two factors to take into consideration with growth spurts?
- timing of correction
- length of treatment
The functional matrix considers that growth is determined by:
Genetics & epigenetics
Stimulation of periostea growth by alteration of neuromuscular environment. This appliance will stimulate periosteal pull & bone apposition:
Frankl appliance
The Frankl appliance is considered a ____ appliance because it is not tied down to the dentition
NOT tooth borne
The Frankl appliance rationale is based on _____ because you are changing ____
The functional matrix; environment
What type of growth does the Frankl appliance harvest?
Intramembranous
A maxillary expander appliance modifies the growth at the:
Mid-palatal suture (above the teeth)
Up to how many mm does a maxillary expander expand the palate transversly?
How much can it expand the mid-palatal suture?
4-5mm
5-6mm on a good day
A maxillary expander is a _____ appliance
Orthopedic
How many mm per day does a maxillary palate expander allow?
0.25 mm per day (1/4 a turn)
28-30 activations (twists)
Functional cross bite must be correct at:
A young age
When correcting a functional cross bite, if the side that contains the cross-bite is corrected, what happens to the other side?
The other side will become edge-to-edge
As a GP one of the most valuable orthodontic procedures we can do is
Anteriorposteiror dimension is treated by:
Class II correction
In cases of true retrognathism (Class II) there is:
no growth
True retognathism is purely:
Skeletal & genetic
For anteroposterior dimention, treated by class II correction, what must be considered?
- The amount of denoalveolar compensations
- Growth potential (growth prediction)
Can true retrognathism be corrected?
No
Growth predictions should take into account:
-age
-gender
-family
Slows down growth at the tuberosity level:
Head gear
Head gear acts at the:
Growth site
Head gear allows the _____ to “catch up”:
Mandible
Head gear allows the mandible to catch up in the _____ plane
Anterior bite plane
What follows treatment with head gear?
Normal growth patterm
The tuberosity (where head gear acts) is a:
Growth site
Where does head gear slow the growth? What does this allow for?
Slows growth of maxilla at tuberosity level; allows mandible to catch up
Growth spurts for girls:
10-12
Growth spurts for girls:
10-12
Growth spurts for girls:
10-12
Growth spurts for girls:
10-12
Growth spurts for girls:
10-12
Growth spurts for girls:
10-12
Growth spurts for girls:
10-12
Growth spurts for girls:
10-12
Growth spurts for girls:
10-12
Growth spurts for girls:
10-12
Growth spurts for girls:
10-12
Growth spurts for girls:
10-12
Growth spurts for girls:
10-12
Growth spurts for girls:
10-12
Growth spurts for girls:
10-12
Growth spurts for girls:
10-12
Growth spurts for girls:
10-12
Growth spurts for girls:
10-12
