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PLEASE NOTE:
If the curve of Spee is unfavourable, the bite fork may
tilt. In this case, it is better to hold the bite fork with
a hand rather than cotton rolls.
E FITTING THE FACEBOW (ARBITRARY)
The patient's mouth must always be open when the
facebow is adapted, i.e. after fitting the bite fork to
the upper teeth.
PLEASE NOTE:
The Leipzig nasion incorporates a telescope with a
spring that counterbalances the weight of the facebow
when the red mark is covered by the outer telescope.
Thanks to the standardized, controllable pressure, the
position of the ear adapters (6)/axis pin (10) in the
arbitrary hinge axis region is reproducible.
_ Patient in lying position. This counteracts the weight
of the facebow and lever effect of the front section.
_ Loosen the set screws (1) and insert the porus
buttons (6) into the patient's auditory canals, allo
wing the patient to assist.
_ Tighten set screws (1), loosen nasion set screw (15)
(1/4)turn, and gently press the nasion (16) onto the
glabella.
_ The middle and index fingers are used to grasp behind
the nasion support while the thumb exerts gentle,
continual pressure on it. The other thumb is used to
stretch the forehead skin to allow the nasion adapter
(17) to adapt to the bridge of the nose.
_ When the red mark is covered by the outer telescope,
tighten the set screw (15) with your free hand.
PLEASE NOTE:
Only loosen the set screws (1) - do not attempt to un-
screw them fully. This also applies to the clinched collar
screw (22) on the fork mounting, which might jam.
F REGISTERING THE POSITION OF THE
UPPER JAW WITH THE UNIVERSAL JOINT
_ Loosen toggle nut (23) to allow the universal joint
to move freely.
_ While the patient presses the bite fork firmly onto
the molar region with cotton rolls on his/her lower
jaw or with his/her hand, the dental-care provider
inserts the fork mounting (21) (with the collar screw
and groove pointing upwards) into the bikte fork hand-
le and firmly tightens the collar screw (22) fully.
_ The toggle nut should be positioned to the right
(or from the patien's view at left) to allow the un-
hindered transfer into the transfer stand (figures H).
_ Tighten toggle nut (23) fully by centralizing the
toggle and exerting uniform pressure on both
ends to prevent it from tipping.
_ Once the position has been registered, loosen nasion
set screw (15) immediately. Retract nasion (16) and
fix it in place with set screw (15), holding the face-
bow to prevent it tipping.
_ Loosen set screws (1) and open the facebow.
Remove the facebow and registration downwards.
8
G ADAPTATION OF THE FACEBOW TO A
TOOTHED JAW
Select one of the following procedures:
a) Use a custom tray with tray handle (25).
b) Proceed as described for the toothed jaw, but
adapt the fork to the customized tray furnished
with 2 - 3 notches (see Centrofix instructions).
H SECURING FOR TRANSPORT (TRANSFER)
PREFERRED METHOD:
Securing the situation of the upper jaw in plaster for
safe transportation.
PLEASE NOTE:
This method is also recommended if the models are to
be articulated in the dental practice. In any case, the
position of the upper jaw should be secured in plaster
directly at the dental practice. The plaster provides for
a solid base. Transfer stand and transfer table are both
stable and cannot be distorted. The plaster index can
be kept for control purposes and to position the upper
jaw at any time without the patient being present.
Few things can be carried out incorrectly and, generally
speaking, nothing can be manipulated falsely. Thus,
articulating has considerably been simplifed.
The method shown here with the magnetic Splitex
Plate Set is also applicable for articulator systems
with screw-mounted model plates where the transfer
table is screwed to the lower part of the articulator.
_ Loosen adapter screw (20) and remove the universal
joint from the facebow.
_ Insert the universal joint with upper registration into
the transfer stand. Tighten adapter screw (20). Raise
the table (c) to just beneath the bite fork and tighten
the Allen screw (b). Remove the joint and bite fork
from the transfer stand.
_ Mix a small amount of articulating plaster (Artifix
711211) to a creamy consistency and place it onto the
table.
_ Reinsert the universal joint with the registration, i.e.
place the bite fork above the soft plaster mush, and
tighten the adapter screw (20) so that the bite fork
rests on the soft plaster.
_ Once the plaster has set, loosen adapter screw
(20), toggle nut (23) and collar screw (22) to sepa-
rate the joint and bite fork.
(a) = socket for Allen wrench)
_ Remove the transfer table from the transfer stand
for articulation.
PREPARING THE FACEBOW COMPONENTS
Before use, the following facebow components should
be prepared as follows:
}
1.
Disinfection
2. Cleaning
for
3. Sterilization
Only use disinfectants and cleaning agents suitable
®
Metal bite fork
Porus buttons
Nasion
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