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The maturational level ( advanced vs. average vs. delayed ) is
especially important to consider in order to understand the
the variations in the timing and amounts of future growth that
different children exhibit. The timing and nature of clinical
treatment depends on these factors.
Growing individuals who demonstrate the same stage ( SMI ) of
maturation can exhibit significantly different amounts of facial
growth. The following conceptual charts illustrate this.
During the rapidly accelerating ( SMI 1-3 ) and very high velocity
( SMI 4-7 ) periods of adolescent growth, advanced maturers
exhibit significantly more maxillary and mandibular growth than
average and particularly delayed maturers.
During the later period of adolescence when maxillary growth
velocity and the amounts of maxillary growth are significantly
decreasing, delayed maturers exhibit more incremental growth
than average and particularly advanced maturers. The maxilla
completes a greater percentage of full growth at an earlier
stage of development than the mandible.
During the later portion of
adolescence when mandibular growth
velocity is rapidly decelerating, delayed maturers exhibit a very
significant amount of additional incremental growth as compared
to average and particularly advanced maturers. Delayed maturers
demonstrate 'catch-up' growth and take a longer time to accomplish
it. This has very significant implications relative to treatment
timing. The termination of growth is at a later chronologic age.
The mandible grows a lot more incrementally during late
adolescence compared to the maxilla.
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.
Silveira AM, Fishman LS, Subtelny JD, Kassebauum DK.
Facial growth during adolescence in early, average,
and late maturers. Angle Orthod 1992:62:185-189.
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