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The 'Maturational Patient Report' supplied by GrowthTek clearly
assists and guides the clinician in formulating a well-timed treatment
plan. It is very important not to rely on chronologic age in
determining whether maxillary expansion will benefit the patient.
This is particularly true when both skeletal and dental expansion
are the goals.
The mid-palatal suture is not completely fused until late adolescence.
As a result, maturational age can be used as a means of judging the
effectiveness of the procedure on an individualized patient basis.
The following charts illustrate the amount of mid-palatal suture
ossification relative to the varying adolescent periods of development.
When the mid-palatal suture is anatomically divided into anterior
and posterior portions, the following is seen:
~ the posterior portion of the suture fuses first
~ the most ideal time for skeletal expansion of the palate is prior
to the maturational stage SMI 4 which is during a period
of very high growth velocity
~ it is best to complete expansion prior to maturational stage 9
which is during a period of decelerating growth velocity
~ when judged on a maturational age basis, no sex differences exist
~ relative to maturational level, advanced, average and delayed
maturers do not demonstrate any differences in ossification
selected reference: Revelo B, Fishman LS Maturational evaluation of ossification
of the midpalatal suture AJODO, 1992
Note: Please refer to the other questions in this 'Clinical Applications'
section of this web site for specific clinical information regarding
maturational timing of treatment. Also refer to the 'Background
Information' section of this web site for additional information.
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