Denar Mark II - The Dénar Mark II Facebow;Earbow System; System Purpose, Setup, and Reference Points

19
The Dénar
®
Mark II Facebow/Earbow is
used to register the correct position for
the patient’s maxillary cast to be mount-
ed in the articulator. In other words, the
facebow/earbow records the relation of
the patient’s maxillary dental structures
to the horizontal reference plane and
transfers this relationship to the articula-
tor.
The use of the Denar
®
Facebow/ Earbow
involves three overall procedures:
A. Locating three reference points
on the patient’s face
B. Assembling the face-
bow/earbow on the patient
C. Transferring the face-
bow/earbow to the articulator
The detailed steps of each of these
three procedures is as follows.
LOCATING THREE REFERENCE
POINTS ON THE PATIENT’S FACE
The components of the facebow kit
needed are: the reference plane locator
and reference plane marker. These two
items are used to locate three anatomi-
cal reference points on the patient’s
face. Of these three points, two are pos-
terior and one is anterior.
There are two means of locating the
posterior points. The first is by precise
location of the terminal hinge axis with a
hinge axis locator.
1
The second means is
by locating the points by average
anatomical measurement, which is sim-
pler and faster, and is the procedure
described in this section of this manual.
V. THE DÉNAR
®
MARK II
FACEBOW/EARBOW (Model D31AB)
1. Other reference material must be consulted for detailed instructions on how to precisely locate
the terminal hinge axis position (i.e., the “Denar
®
Procedures Manual
__
Procedures for Occlusal
Treatment” or the “Denar
®
Office Tutor” ).
´
´
fig. 31
fig. 32
´
REFERENCE ROD INDEX
MILLIMETER SCALE
43mm
NOTCH
POSTERIOR REFERENCE POINT HOLE