Hanau Spring-Bow Manual De Instrucciones página 5

Maxillary
Input
Insert Bitefork
and Close Firmly
Instruct the patient to gently close and firmly
support the Bitefork in this accurate and immobile
maxillary occlusal registration.
The imprint or the registration of the maxillary
shall be used for orienting the upper cast to the
Articulator. No concern is to be given to the man-
dible as its function in this instance is ONLy to
hold the Bitefork securely against the maxillary
arch.
6. Figure 9 depicts the stem of the Bitefork enter-
ing the loose Bitefork Clamp. Slide this Clamp
① onto the stem perhaps 4 centimeters and then
"Spring open" the Bow ② and swing it downward
as ③ to allow the Earpieces to enter the the exter-
nal auditory meatus.
Earpieces
in External
Auditory
Meatus
Bitefork Stem
Figure 8
Earpieces
Bow
Bitefork Clamp
Stem of
Bitefork
1
Figure 9
7. Slightly loosen the spring loaded Thumbscrew
that secures the Anterior Patient Reference,
Figure 10. Carefully rotate this Reference Orbitale
Pointer) to a proximity with the patient's infra-
orbitale notch.
Elevate the Bow at the Transfer Rod to align the
top of this Reference with the patient's orbitale.
This patient landmark is the lowest point on the
infra-orbitale rim and is the anterior reference of
the Frankfort Horizontal Plane.
The top of the Earpiece relates against the pori-
on which is said to be the posterior reference of
the Frankfort. The superior surface of the temple
portion of the Bow now visually represents the
true Frankfort Horizontal Plane.
8. Tighten the Clamp Thumbscrews in the suggested
order, grasping the Bow to offset torquing and
patient discomfort. A trial run of these Clamps is
suggested before the patient application to recog-
nize the amount of tightening necessary.
Thumbscrew
A. Thumbscrew No. 1 - hold the right side of Bow
while securing the Transverse Clamp to the
Transfer Rod.
B. Carefully rotate the Anterior Patient Reference
away from the patient. Store this Reference by
swinging it forward to the right temple of the
Bow and lightly engage the Thumbscrew.
C. Thumbscrew No. 2 - hold the right side of
Bow while tightening the Bitefork Clamp to
the Transverse Rod.
Anterior Patient
Reference
(Orbitale Pointer)
Patient's
Infra-Orbitale
Notch
Bow
No. 2
No. 3
No. 1
Transfer Rod
Figure 10
3