ResMed Narval CC Professionell-Gebrauchsanweisung Seite 8

Adjusting lateral deviation
To prevent the splints from popping out due to
unbalanced forces, the length of the connecting
rods can be adjusted to obtain a natural
deviation of the mandible.
In this example, the patient has a 2 mm
deviation to the right. This means:
• The connecting rod on the right needs
to be 1 mm longer (30 mm in length).
• The connecting rod on the left needs
to be 1 mm shorter (28 mm in length).
30 mm
Lateral deviation of 2 mm to the right
Table showing length of connecting rods
relative to midline deviation:
Deviation Length of left rod
- 0.5 mm
1 mm
2 mm - 1 mm
- 1.5 mm
3 mm
4 mm - 2 mm
Adjusting the balance of the slip plane
1
1. The patient should bite down on coloured
articulating paper while wearing the
appliance.
2. Remove the coloured premature contacts
with a large, long and abrasive bur in order
to increase the stability of the planes.
Always remove layers step by step in small
increments. Removing significant amounts
of material could weaken the splint. Try the
device on the patient.
Hold the device to the light to estimate the
remaining thickness and, in case of doubt,
check with a caliper: the thickness must
remain greater than 1.2 mm.
8 ENGLISH
28 mm
Length of right rod
+ 0.5 mm
+ 1 mm
+ 1.5 mm
+ 2 mm
2
3. Use a polishing bur then unmodified pure
alcohol to remove any residual colour left by
the articulating paper.
4. Rinse the splints.
Adding elastic bands
Create elastic slots by making two incisions with
a drill or a cutting disk on the vestibular face of the
lower splint between two teeth. Try to ensure the
incisions are vertically aligned with the connecting
rod button.
Respect the following dimensions:
• Height of the slots: 2 to 3 mm. Do not touch
the margins.
• Distance between slots: 5 mm. Do not touch
the margins.
2 mm
5 mm
Requirements to follow when choosing elastic
bands:
• Use non-latex orthodontic elastic bands
intended for intra-oral use.
• Use similar elastic bands on each side of
the device (do not mix elastics with different
characteristics).
• Select elastic force and size considering
the comfort/efficacy compromise. Check
tolerance by asking the patient to try the
device during the appointment.
• Prefer a lower elastic force in the case of low
retention.
Recommendations for initial elastic setup:
• Diameter: 4.8 mm (3/16
• Force: 170 g (6 oz) when stretched at 3 times
its initial diameter
inch)
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