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25 Cards in this Set
- Front
- Back
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Describe the concept “Pattern of Growth”
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Changes in proportions over time
Pattern = Change in proportion/time |
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If a girl’s bone age is 12 years old, what is her chronological age most likely to be?
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12
The greatest probability is that the developmental age matches the chronologic age |
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Longitudinal growth data highlights individual variations
True False |
True
Longitudinal data is very efficient for growth studies Longitudinal data highlights individual variations as opposed to cross-sectional data that does not. |
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The cephalocaudal gradient of growth within the face predicts ….
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The structures farther away from the cranium grow faster than those closer to it
In postnatal life both jaws grow faster than the cranium The mandible grows faster than the maxilla |
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What is the difference between growth velocity curve and growth distance curve?
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Growth distance curve plots the total growth achieved
Growth velocity curve plots the growth increment since the last measurement |
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Which one is not an area of significant bone apposition during growth of the mandible
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Chin
Little or no bone is added in the chin area |
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What is the major area of bone growth in the maxilla?
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The free surface of the tuberosity
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Growth of the cranial base involves….
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Endochondral ossification at growth centers
Apposition of new bone along suture lines Apposition of new bone on external surfaces Removal of bone from internal surfaces |
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Which processes are involved in the growth of the cranial vault?
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Apposition of new bone at the sutures
Adding new bone to the outer surface Removal of bone on the internal surfaces No endochondral bone formation |
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Growth of the maxilla involves….
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Apposition of new bone along suture lines
Apposition of new bone on internal and external surfaces Removal of bone on external and internal surfaces |
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After it first comes into occlusal contact with the antagonist, how far does a typical first permanent molar erupt?
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After it comes into occlusion a typical first molar erupts 10 mm or more
The mandible grows away from the maxilla creating space There is a lot of vertical growth after age 6 |
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Which mechanisms move the roof of the mouth downward
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Displacement of the maxilla away from the cranial base
Apposition of bone on the inferior surface of the palatal bone Resorption of bone on the nasal surface of the palatal bone |
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The maxilla grows faster than the mandible during adolescent growth
True False |
False
The mandible grows faster than the maxilla during adolescence |
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On the growth charts (6 month data plots) what is the significance of a child crossing percentiles downward?
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Indicates growth disturbance, possibly chronic illness or other chronic problem
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Name a major disadvantage of cephalometric radiography on the study of growth
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Major disadvantage: Provides a two dimensional view of a three dimensional structure
Major advantage: Can provide longitudinal data |
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What happens when the cartilage of the nasal septum is surgically removed?
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The prominence of the midface is greatly diminished
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Name the theories of craniofacial growth
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Suture Theory
Cartilage Theory Functional Matrix Theory |
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What happens when the mandibular condyle is transplanted to a different location?
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Grows very poorly when transplanted
This is evidence that is different from the primary growth cartilages |
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Are the sutures between craniofacial bones sites or centers of growth
Explain the evidence supporting your answer |
Sites of Growth
Place where growth is ocurring Centers of Growth Can grow independently Carries information that controls growth (genetically controlled) Evidence Failure of suture growth in transplantation Increased growth when the sutures are mechanically pulled apart Impeded growth when the sutures are mechanically compressed |
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What is the chance in humans that normal growth will be observed after the mandibular condyle is lost?
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75%
After condylar fracture |
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Different systems grow at different rates. Which one grows the fastest in life?
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The nervous system grows very rapidly early in life. It’s growth is completed at age 6 or 7
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At what stage do the lymphoid tissues reach their maximun development?
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Prior to adolescence
They shrink during adolescence to their normal adult size |
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The most rapid growth of general body structures occurs at what period of life?
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The most rapid growth is in infancy
Accelerates in adolescence but is not as fast as in infancy |
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More space in the pharyngeal area is provided during adolescent growth by…
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Shrinkage of the tonsils and adenoids
Forward movement of the tongue as the mandible grows |
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If a child’s chronological age is 10 but the bone maturation age is 12 what is her dental age most likely to be
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12
Dental age is somewhat correlated to skeletal age |
