General
Information: Artex® Type NK
Although the NK is commonly chosen for 'average-value' mounting
purposes, it does allow for Bennett Angle adjustment from 0°
to 20°. The condyle radius is fixed at 19mm and the condylar
inclination at 35°. Closing the centric locks ensures that the
condyles are in their centers of rotation.
INSTRUCTIONS FOR ASSEMBLY, CENTRIC ADJUSTMENT,
AND USE
The "NK" articulator (#47520) is a semi-adjustable, non-arcon
articulator with a 0º to 25º adjustment setting for Bennett
Angle, and a fixed condylar inclination of 35º with a 19mm
curvature radius.
ASSEMBLY AND CENTRIC ADJUSTMENT
- Remove the two screws from end of the lower arm of the articulator,
and set them aside. Insert the prongs of the lower arm into the
predrilled holes found on the bar between the upright arms of
the articulator (with the lower arm facing you, make sure the
numbers designating Bennett angle are also facing you). Insert
the screws from the back, and tighten them with the larger of
the supplied allen wrenches. Alternate between the two screws
when tightening them. The lower arm of the articulator must be
flush with the center bar, and tightening the screws will help
achieve this.
- Slide the incisal guidance pin into the slot on the upper arm
of the articulator, with the number designations towards the front,
and tighten the large white screw to hold it in place. Make sure
the pin is set at zero.
- Remove the two plugs from the top arm of the articulator, to
uncover the underlying axle set-screws.
- Using the smaller of the two supplied allen wrenches, loosen
both axle set- screws.
- Lift up the plastic clips on either side of the articulator.
- Attach the upper arm of the articulator by making sure the condyle
balls rest in the center of each condyle housing. You may have
to pull on the ends of the axle to have the condyles match the
housing locations.
- Slide the small inclined incisal table onto the flat table at
the front of the lower arm. Make sure the incisal pin is in its
centric position (represented by a small u-shaped cut-out on the
incisal table). You may have to loosen the large white screw holding
the pin, to move the pin backward or forward slightly.
- Maintain the upper arm in this centric position, and pull the
right side of the condyle axle completely to the right as far
as it will go, making sure that the condyle ball rests properly
in the housing. Tighten the right axle set-screw. Repeat this
procedure for the left side. Close the plastic clips to ensure
each condyle is in its center of rotation.
- Place your hand on the upper arm of the articulator, and hold
the bottom of the articulator with your other hand. Try to move
the upper arm back and forth to ensure that there is no "play"
or movement. If the arm is not tight, loosen the axle set-screws
again, and repeat step 6. 10. If an average value setting is desired,
set the Bennett angle at 15º.
INSTRUCTIONS FOR USE
You will need to mount magnetic SPLITEX ® plates (46100) onto
the articulator prior to using the unit for
the first time (see separate instructions). Axis-related models
can then be mounted to the articulator by
using a "buffer" plate in-between the magnetic plate and
the quick-setting plaster that will hold each
model.
Accomplishing settings and movements:
Lateral movement for replication of excursions can be achieved
by using your thumb to lift up
the plastic clip (found on the left or the right of the upper arm
of the articulator) which holds the
condyle ball in its center of rotation. Open up the left clip to
allow for lateral movement of the left
condyle along its condylar pathway, or the right clip to allow lateral
movement to the right. Both
clips can be opened to allow for protrusive movement.
Pressing the clips down allows the plastic tongue to center the
condyle ball(s) in the lowest
position of the condyle path. Only opening and closing movement
is now possible.
Bennett angle setting adjustments can be made by loosening the screw-head
on either arm. Then
line up the vertical mark for the appropriate angle-setting (determined
by lateral check-bites
provided by the dentist, or by using average values) with the vertical
reference line, and relock
the screw-head.
DCF#3701 rev0
