PFM In Dentistry No Any Poisonous Side Effect Pure Titanium Dental
Post and Core
Steps in tooth preparation
Removal of RC filling material
Enlargement of the canal
Preparation of coronal tooth structure
Prefabricated post and core system
Eliminate weaker residual walls, clean up the cavity, preserving
all healthy dentine
Prepare the root canal according to your usual procedure
(Gates,paesso reamers) the post is chosen according to the canal's
diameter, not to the root's.
Prepare the composite bonding cement, coat the post Insert it
immediately into the canal
Fit the core form boxing system Fill up with the core composite
while pressing and polymerize
Custom cast post system
Remove any weak, thin, and/or unsupported tooth structure.
Using progressively larger diameter Pesso reamers remove the gutta
percha to the predetermined initial depth
Repeat this process as necessary leaving 4-5 mm of gutta percha as
an apical seal.
Add a keyway to resist rotation of the post/core. Place the keyway
in the bulkiest part of the remaining tooth structure.
Try-in the preformed plastic post and be sure it goes all the way
down the prepared canal without binding (a totally passive fit).
Trim it as necessary. Measure the post relative to the depth of the
canal with a periodontal probe
Lubricate the canal with Duralay lubricant
Using the "bead brush" technique, fill the canal
completely with Duralay resin. Use the bristles of a brush (bent at
a 45 degree angle for easier access) to force acrylic down the
canal and express any trapped air
Immediately, dip the plastic post in acrylic liquid (to soften post
and enhance bond of acrylic) and seat it in the canal to its full
depth. Move the post up and down in the canal 1-2 mm (only after
the Duralay is nearly set) to avoid getting it "locked
Using hemostats, carefully remove the post pattern and inspect it
to be sure it is fully formed (with no voids).
Cut off the top of the plastic post so that your patient can close
Using a large diameter coarse diamond (high speed handpiece at
"near stall" speed with water spray), shape the
pattern to ideal preparation form (on the tooth).
Using hemostats (held mesiodistally), remove the pattern from the
tooth. The pattern should not be removed (except one time to check
that the post portion is fully formed) until it is completed. There
is the risk of breakage each additional time the pattern is
Indirect technique of making custom post and core