Bio-Art A7 Plus - Mounting the Casts on the Articulator; Preparing the Articulator; Articulator Model 4000-S

3 - MOUNTING THE CASTS ON THE ARTICULATOR
3.1 PREPARING THE ARTICULATOR
The adjustments of the articulators mentioned below are
only used to mount the casts on the articulator. However,
the professional may choose to use other angulation
techniques to personalize the settings.
The marks 1, 2 and 3 of the Face Bows are used to adjust
the intercondylar distance (small, medium, large), when
the mounting is carried out with the Articulator Model
4000-S. For the other articulators models, it must be
ignored.
3.1.1 Articulator Model 4000-S
a) Fix the condylar elements into the lower frame holes
according to the patient's registration (1, 2 and 3) made
with the face-bow. With the help of the condylar element
shaft, tighten the condylar elements slightly (fig. 21).
b) Adjust the same intercondylar distance in the upper
frame, expanding or closing the condylar guide with the
micrometric expanding spindle (fig. 22).
Note: To facilitate adjustment of the intercondylar
distance of the upper frame using the micrometric spindle,
leave the wing screw of the condylar guide inclination
slightly loose.
The relationship between the intercondylar distance and
the positioning of the condylar guide is given as follows:
*Small = without expansion (condylar guide totally closed)
*Medium = first marking on the condylar guide axle
*Large = second marking on the condylar guide axle
Important: A fine adjustment should be made to prevent
lateral movements of the upper frame in relation to the
lower frame observing that the position of the condylar
elements should be touching the posterior and superior
walls of the condylar guide and the lateral of the bennet
angle adjusting device simultaneously (fig. 23) i.e., the
reference mark for the adjustment of the intercondylar
distance in the condylar guide axle does not always
coincide with the correct position of adjustment of the
upper frame. A fine adjustment is therefore necessary,
using the expanding spindle.
c) Adjust the condylar guide at a 30° angle and a negative
“Benett” angle (fig. 24 and 25), assuring the stability of the
articulator at a central position.
FIG. 21
FIG. 22
FIG. 23
FIG. 24
FIG. 25
5