Depending on the respective school of thought
the template is attached with the radius sector
in relation to the anatomic/morphologic dental
cusps. (according to Slavicek: canine cusp and
distobuccal cusp of the first molar)
The radius is corresponding to a circle with the
radius indicated on the template. (The adjoining
picture shows a template R = 60 mm.)
The curve of the axis bearing area differs con-
siderably from the curve of the radius sector.
By rotating the template without losing contact
with the axis bearing pin, you can move the po-
sition of the circle in relation to the axis of the
articulator.
Scaling: If the template touches the axis bear-
ing pin (grey) in position 0, the imaginary circle
of Spee runs exactly through the hinge axis of
the articulator. With the contact point in the neg-
ative area the scale displays the distance in mm
of the circle moving behind the hinge axis, con-
tact in the positive area of the scale shows the
distance of the circle in mm of the circle moving
in front of the hinge axis.
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