Ivoclar Vivadent FRC Postec Plus - Manual (Page 2)

Clinical instructions
For more detailed information, please refer to the separate
Instructions for Use of the mentioned products.
1. Preparing the tooth
–
Successfully completed endodontic treatment
– Select the FRC Postec Plus suitable for the tooth to be restored
– Prepare the coronal residual tooth structure to accommodate the crown (mini-
mum dentin wall thickness
≥ 1.5 mm) and determine the reconstruction
method (direct or indirect technique by means of a post and core build-up)
depending on the residual dentin structure.
– Determine the required preparation depth and mark the distance on the corre-
sponding instruments by using silicone stoppers.
– The remaining root canal filling should demonstrate an apical length no
shorter than 4 mm.
– The length of the post within the root canal must at least correspond to
the coronal length of the prosthetic restoration.
– Remove the root canal filling (e.g. Gates-Glidden or Peeso reamer)
– 1,000 - 5,000 rpm (instrument speed, green-angled handpiece)
– For posts of Size 0, use instruments with a maximum diameter of 0.5 mm.
– For posts of Size 1, use instruments with a maximum diameter of 0.7 mm.
– For posts of Size 3, use instruments with a maximum diameter of 0.9 mm.
– Prepare the canal down to the required depth using the reamer.
– 1,000 - 5,000 rpm (instrument speed, green-angled handpiece)
– Rinse and clean the reamer during preparation.
– Final preparation of the tooth to accommodate the post and core build-up. If
necessary, apply antirotation protection (e.g. retention box, canal inlay)
– Rinse the root canal (e.g. H2O2, 3 %)
2. Further procedure for the direct method
2.1 Try-in and conditioning of FRC Postec Plus
–
Check proper fit of the post.
– Determine the coronal length and shorten the post using rotary diamond
grinders (extraorally), if necessary. Do not use scissors or cutting pliers!
– After try-in, clean the post with phosphoric acid etching gel (e.g. Total Etch).
Allow the etching gel to react for 60 seconds, then thoroughly rinse with water
and dry.
– Silanate the post (e.g. Monobond-S). Allow a reaction time of 60 seconds, then
carefully dry with an air syringe. Do not touch the surface with your fingers
after that.
2.2 Adhesive cementation with a dual- or self-curing luting
composite
–
Use for example Multilink Automix, MultiCore Flow or Variolink II
– For conditioning the dentin and cementing the post, please refer to the respec-
tive Instructions for Use of the cementation system in use.
(If a dual-curing luting composite is used, polymerize from the occlusal surface
for at least 60 seconds holding the curing light close to the post).
– Important: When luting composite is used in combination with an
adhesive system, the luting composite should not be applied to the
root canal which has previously been coated with adhesive. The luting
composite and adhesive excess may intermix, which can lead to prema-
ture curing. As a result, it may not be possible to move the post into
the desired position.
2.3 Core build-up
–
Directly sculpt the build-up using a highly filled composite such as MultiCore
Flow, MultiCore HB or Tetric Ceram.
– For conditioning the dentin and applying the composite, please refer to the
Instructions for Use of the corresponding composite.
2.4 Preparing the tooth core according to the planned crown
–
Observe circular embrasure of the core.
– The preparation margin must be located approx. 2-3 mm in the natural tooth
structure.
3. Impression taking and provisional restoration
–
Only use eugenol-free cements to place the temporary, since eugenol may
inhibit the polymerization of the luting composite.
– If resin-based temporary cements are used, isolate the preparation with Vase-
line to prevent the cement from chemically bonding with the composite core
build-up.
– During long temporization periods, the provisional should be re-cemented
several times to ensure an effective seal at all times.
4. Next appointment
–
Incorporate the permanent restoration (e.g. IPS Empress System) according to
the corresponding Instructions for Use.
5. Removing the post in case of a revision
–
If the removal of the FRC Postec Plus root canal post is indicated, this can be
done using rotary instruments.
– Due to the similar moving behaviour of the rotary cutting instruments within
the glass-fibre-reinforced root canal post and the root dentin, this procedure
has to be carried out with caution to control the risk of root perforation. Check
the individual steps by means of X-rays.
– Working steps:
– Make an X-ray in the right angle technique to determine the length and size
of the post.
– Remove the build-up component and determine the position of the root
canal post
– Drill a preliminary hole in the centre of the post using an extra-long round
bur with a diameter of 0.6 mm.
– After that, remove the root canal post using the FRC Postec Plus reamer.
Important Note
– If the stipulated clinical indications cannot be observed, the FRC Postec Plus
should not be used. Any use for indications other than those stipulated may
jeopardize the success of the subsequent prosthetic restoration.
– Do not grind FRC Postec Plus and do not apply mechanical retentions
➔
predetermined breaking points
– Cementation should be exclusively carried out according to the principles of
adhesive luting. We recommend Multilink Automix, MultiCore Flow or
Variolink II from Ivoclar Vivadent.
– Adhesive cementation requires keeping the bonding surfaces dry. If possible,
place a rubber dam. In all other cases, provide relative isolation (cotton rolls,
saliva ejector).
Warnings
Grinding FRC Postec Plus generates glass-fibre dust, which may cause itching of the
skin. Therefore, the use of gloves is recommended. Avoid the inhalation of grinding
dust.
Care instructions
–
Reamer:
The product is supplied in non-sterile form. Please disinfect or sterilize the
instruments before each use.
– FRC Postec Plus:
The root canal post can be disinfected with medical alcohol.
– The root canal post can be sterilized in the autoclave for
5 minutes at 134 °C/273.2 °F and 2.1 bar.