Day 1- Dev. of Dentofacial Complex Flashcards
What grows faster mx or mn
Mx should be ahead of the mn. (Should be longer and in front of the mn–so if you see a pt with an underbite–need to stop and observe).
Proportion of head to body is reduced from
50% to 12%
Mn has 2 periods of rapid growth that mirrors somatic (general) growth
Early period Late period (coincides with onset of puberty)
Growth of length of mn correlates with?
growth in height and onset of puberty
Menarche occurs ____ years after peak growth
1.5-2
Similar pattern of growth in early and late maturers if height is plotted as a function of
biologic age (onset of menarche) instead of chronological age.
What is not a good indicator/marker
dental age
On average girls reach pubertal growth spurt ___ years before boys.
2
Sesamoid bone correlates with
peak mandibular growth
Timing needs to be referred
CS3 and CS4
For surgery want to make sure mandible has?
stopped growing
When cranium grows will push what forward?
maxilla
Mid-face deficiency aka small maxilla-want to start treatment when nature is still growing so when?
Sutures are still growing about 6-8 years old
Growth of the nasomaxillary complex is primarily through
bone apposition at the sutures that connect the maxilla to the cranial base.
“Push from Behind” due to growth of cranial base (before age 6)
Surface remodeling
Growth of the Mandible due to (2)
Endochondral ossification (mn condyle) Appositional growth and remodeling (mandibular body)
Mx width is possible so long as..
midpalatal suture is patent.
Successful orthodontic treatment occurs?
during optimal skeletal growth
Bone apposition in posterior ramus is the major mechanism of
mandibular growth.
Width–this direction of growth is typically completed when?
prior to adolescent growth spurt (onset of puberty)
Width becomes affected by
adolescent growth
Midpalatal suture (mx) is patent and becomes increasing interdigitated with age
Mn “suture” is fused by 1 month post-partum
Intercanine width decreases with increasing age.
Research shows that teeth are passively erupting to compensate for ____.
growth
_____ increases during time of tooth eruption
facial height
Changes in facial height continues into ____. This is compensated by___
adulthood; passive tooth eruption.
Internal Rotation
subtract or remove from any mandibular growth that you have.
1. Rotation around mn condyle or 2. rotation centered within mb. body.
Thrumb thrusting impacts
occlusion
Breathing effects
occlusion and posturing
Changes in _____ greater than changes in facial skeleton with aging.
facial soft tissue profile
As you age how does smile change
show less of your upper teeth, and more of your lower teeth.
