1. How to construct the
Goal Anterior Limit Line
(GALL)

2. forehead shapes
straight angular round
trichion/superion
glabella
FA point
trichion
superion
FA point
glabella
glabella
FA point
superion
trichion

3. 1 judged -2 mm to
FA point of the
forehead
1. Place patient in an upright head position.
2. Select the FA point of the forehead
(midway between trichion/superion and
glabella).
3. Judge how far the FA point of the upper
central incisor is: even with (0), anterior
to (+), or posterior to (-) the FA point of
the forehead.

4. 19 -7 = 12 x .6 = 7.2mm
1 is -2 mm to FA point of the
forehead
FALL GALL
1. On a cephalometric tracing, mark a point
(inferion) near the upper central incisor
to indicate whether the FA point of the
incisor is: even with (0), anterior to (+),
or posterior (-) the FA point of the
forehead.
2. Draw a line (FALL) from the FA point of
the forehead to inferion. Draw a line
from superion to glabella.
3. Measure the forehead inclination.
4. Subtract 7 from the forehead
inclination.
5. Multiply this number by .6 mm.
6. For every degree greater than 7 , the
GALL is .6 mm more anterior than the
FALL. For a forehead inclination of 0 or
less, the GALL is the same as the FALL.
7. Draw the GALL parallel to the FALL, but
not beyond glabella.