Fitting the appliance:
1.
Heat the
upper tray
(i.e. the part with the guide bar/ C-bar) in a boiling water bath for about 3 ½ minutes with the hard outer tray shell facing the bottom.
As the tray heats up the thermoplastic filling will become clear and the tray will rise to the surface.
Note:
Nitrile gloves are most suitable for the fitting.
2.
Use a spoon or small pliers to take the tray out of the water. Carefully shake off any excess water by only touching the outer tray shell. Allow it to cool
down in the air for about 15 seconds. Make sure that the material does not cause burns whilst still being mouldable.
Note:
Drink some warm water in
advance so that your teeth get used to the warmth.
3.
Place the tray
centrally
over the upper teeth so that the marker on the front edge is between the front teeth and the front teeth are as close to the front of
the tray as possible. Press the bottom of the tray from the front to the rear firmly against the teeth using your thumbs and forefingers. Keep the tray in
place for about 30 seconds before carefully removing it from the mouth by only touching the outer tray shell.
4.
Let the tray cool down for a few seconds in a cold water bath to harden the lining.
Fig. 2: Upper jaw tray
Fig. 3: Lower jaw tray
Fig. 4: Adjusting screw & locknut
5.
Heat the
lower tray
(i.e. the part with the adjusting screw) in a boiling water bath for about 3 ½ minutes and allow it to cool down for about 15 seconds
(see steps 1
–
2).
6.
Couple the lower tray with the upper tray by inserting the head of the adjusting screw of the lower tray with gentle pressure from the side into the insertion
groove at the bottom of the upper tray. Check the temperature of the material with your fingers. Place the upper tray on the upper teeth. Then place the
lower tray
centrally
over the lower teeth with the front marker of the lower tray in vertical alignment with the marker of the upper tray and the lower front
teeth as close to the front of the tray as possible. Bite down until the teeth touch the bottom of the whole tray to create deep teeth impressions.
Keep the
upper and lower jaw closed for about 10 seconds whilst using your fingers to firmly press excessive thermoplastic material at the outer sides of the tray
against the teeth and gums.
Caution:
Hold the tray steady.
7.
Remove the appliance from the mouth and decouple the trays carefully. Place the lower tray on the lower teeth again. Keep the tray stable and stick out
the tongue so that the tongue frenulum leaves its impression in the material. Then slightly open the mouth and use your fingers to firmly press excessive
thermoplastic material at the inner sides of the tray against the teeth and gums. Keep the tray in place for about 30 seconds before carefully removing it
from the mouth.
8.
In a still warm and mouldable condition, you can slightly cut off excessive thermoplastic material beyond the edge of the outer tray shell, preferably with a
pair of curved scissors (Fig. 2 [1]). Leave some excess material of about 2
–
4 mm beyond the edge at the inner sides of the tray (Fig. 2 [3]). Beyond the
last back tooth (molar) excess lining should be flat and smooth along the bottom surface of the outer tray shell (Fig. 2 [2]).
9.
Let the tray cool down for a few seconds in a cold water bath to harden the lining.
10.
Again, heat the
upper tray
in a boiling water bath for about 30 seconds and allow it to cool down for a few seconds.
11.
Couple the upper tray with the lower tray and check the temperature of the material with your fingers. Place the upper tray carefully on the upper teeth
without changing the teeth impressions of the first fitting. Place the lower tray on the lower teeth. Bite down until the upper teeth touch the bottom of the
whole tray to create final, deep teeth impressions. Keep the upper and lower jaw closed for about 10 seconds whilst using your fingers to firmly press
excessive thermoplastic material at the outer sides of the tray against the teeth and gums.
12.
Remove the appliance from the mouth and decouple the trays carefully. Place the upper tray on the upper teeth again. Slightly open the mouth and use
your fingers to firmly press excessive thermoplastic material at the inner sides of the tray against the teeth, gums and palate. Keep the tray in place for
about 30 seconds before carefully removing it from the mouth. The following procedure corresponds to steps 8
–
9.
13.
If one of the trays does not fit perfectly
, heat it in a boiling water bath for about 10
–
15 seconds, let it cool down for a few seconds and couple it with
the second tray. Place the appliance carefully in the mouth without changing the teeth impressions of the first fitting. Suck in and swallow the saliva.
Massage the cheeks from the outside to achieve an optimal fit. Remove the appliance after about 30 seconds from the mouth and let it cool down in a
cold water bath. Rough edges can easily be removed by dipping the appliance briefly into a hot water bath and then smoothing the edges with a wet
finger.
14.
By loosening the locknut and turning the screw you can now adjust the protrusion. Thereafter the locknut must be fixed against the housing (Fig. 4). The
tick marks on both trays allow the reading of the mandibular protrusion symmetrically in 1 mm increments. The adjusting screws are 12 and 16 mm long.
Important:
For safety reasons the screws should be always engaged a minimum of 7 mm into the 9 mm long housing, but never extend out of the front
(Fig. 4).
Use the longer screw if necessary.
Setting the lower jaw advancement:
At the onset of treatment, lower jaw advancement should not exceed about 50% of the maximum lower jaw protrusion. If
necessary, the advancement can slowly be increased as you adapt to wearing the device.
Doc. No.: UI.AP2.0221.GE.01
