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The time between each maturational stage ( SMI ) differs
relative to each combination of SMI ( total of 23 ) and each
maturational level subgroup ( total of 14 ). The duration of
adolescence relative to the maturation level is slightly longer
with girls. Identifying only the stage ( SMI ) is inadequate
for growth estimation. The level of maturational development
( advanced vs. average vs. delayed ) is also required.
As seen in the following conceptual chart, advanced maturers take
significantly less time to develop during the rapidly accelerating
( SMI 1-3 ) and very high velocity ( SMI 4-7 ) periods of
development as compared to average maturers and particularly
when compared to delayed maturers.
During the later period of
adolescence ( SMI 8-11 ) when
facial growth velocity is decreasing, the reverse is demonstrated.
Delayed maturers take less time to pass through this developmental
period when compared to average maturers and particularly when
compared to advanced maturers. Advanced maturers are rapidly
becoming 'burnt out' and exhibit little incremental growth. This is
especially true in the maxilla, since the maxilla demonstrates a
greater percentage of total completed growth than the mandible
during late adolescence.
All of the above factors vary relative to the 23 stages and
14 levels of maturation. The GrowthTek Patient Report
evaluates the specific developmental factors regarding your
patient's unique maturational profile.
refer to the 'Clinical Applications' section of this web site
for pertinent information regarding rational timing of treatment
relative to growth velocity.
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