45
The Dénar
®
Field Inspection Gage is an
optical inspection gage used to cali-
brate Dénar
®
Articulators and laboratory
Relators to tolerances which allow the
transfer of mounted casts between cali-
brated articulators and Lab Relators.
NOTE: This manual details the use of
the Dénar
®
Field Inspection Gage to cal-
ibrate the Dénar
®
Mark II Semi-
adjustable Articulator. It does not detail
the calibration procedure for the Dénar
®
D5A Fully Adjustable Articulator and D6
Centric Lab Relator; nor does it describe
the recommended applications of the
Dénar
®
Two-Instrument System. For
complete information on these subjects
the reader is referred to the Dénar
®
Office Tutor (Cat. #D1269) and the
Dénar
®
Field Inspection Gage
Instruction Manual (Cat. #D166).
The gage consists of an upper member
called the “scope” and a lower member
called the “stage.” The gage is supplied
with two inter-bow gage pins. Inter-Bow
Gage Pin #1 and Inter-Bow Gage Pin #2
(fig. 83).
CARE OF DÉNAR
®
FIELD
INSPECTION GAGE
The Dénar
®
Field Inspection Gage is a
precision instrument capable of making
measurements in three directions to an
accuracy of one ten thousandths of an
inch (.0001”). To insure its continued
accuracy, the components should be
handled carefully and not be allowed to
come to rest on a hard surface with a
force which would cause a nick or
deformation of the bearing surface.
When a component is not in use, it
should be kept in its protective case. It
is advisable to have a piece of cork, rub-
ber, cardboard or other soft, lint-free
surface to rest the gage components on
when they are not mounted in their case
or on a Dénar
®
instrument.
IMPORTANT There are several socket
set screws on the scope member of the
Field Inspection Gage. Do not attempt
to turn these screws with a wrench.
These screws are for use of factory
authorized personnel only. Manipulation
of these screws can affect the accuracy
of the instrument.
For accuracy, it is important that the
bearing surfaces of the Field Inspection
Gage components, Articulator, Lab
Relator, as well as the mounting plates,
be wiped clean of foreign material prior
to their use.
VERTICAL ALIGNMENT
Prior to using the Field Inspection Gage
to align a Dénar
®
Articulator or Lab
Relator the distance between the maxil-
lary and mandibular bows (inter-bow
distance) of the articulator or Lab
Relator must be precisely established
by means of the inter-bow gage pin #1,
as illustrated in fig. 84.
APPENDIX C
CALIBRATION PROCEDURE
fig. 83
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