Brown,
W.A.B., Molleson T.L., Chinn S. (1984). Enlargement
of the frontal sinus. Annals of Human Biology
11:221-226
Abstract
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The
enlargement of the frontal sinus has been analysed
in a longitudinal study of 49 males and 47 females
for whom a first lateral cephalogram was available
at from 2 to 5 years of age for 88 subjects and
from 6 to 11 years for 8 subjects. Thereafter
the cephalo-grams were taken at approximately
yearly intervals and in 28 subjects a last cephalogram
was taken at 24 years or older. In only six subjects
was enlargement of the sinus still proceeding
at the time of the last cephalogram.
The enlargement was assessed by a standardized
measurement of the maximum vertical height of
the sinus. The median age for the first appearance
of the frontal sinus was 3.25 years for the boys
and 4.58 years for the girls. It enlarged on average
to 32.60 mm (SD 9.10) in the males and 26.60 mm
(SD 7.50) in the females.
The median age at which the main increase in size
of the sinus ceased was 15.68 years for boys and
13.72 years for girls, thus suggesting that the
enlargement of the frontal sinus, a mainly osteoclastic
activity, follows very closely the trends for
growth in bone lengths.
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