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Obturation (Aim (IDEAL OBTURATION (Filled to apical constriction (.5mm…
Obturation
Aim
Fluid tight seal
Prevent growth or regrowth
Prevent microleakage into root canal system
prevent bacterial toxins from reaching apex of tooth
Entomb bacteria to the root canal wall
IDEAL OBTURATION
Filled to apical constriction
.5mm short of radio apex
Homogenous
does not extend beyond canal orfice
Funnel shaped
no voids
NOT IDEAL OBTURATION
Overextended by 1mm or more
extrusion/foriegn body reaction,
POOR RC HEALING
Underextended
Underfilled/non homogenous-voids 20% canal
Evidence
Radiographic voids
cant fill where walls are not clean
only voids cause microleakage
Post treatment apical perio
Marginal perio
Non endodontic
PTED
persistent apical perio
root fracture
Diffuse apical perio
Mesial flute/anatomic defect
Diffuse AP remission
Apical scar
Microleakage
Coronal seal
Just as important as eachother
poor coronal seal will cause entry of microorg
dont completely prevent leakage
Caoh2 good as sealer
place a glass ionomer cement over gutta percha
seals entry
Radicular seal
What is it?
Diffusion of ions, into tooth filling
undectedable passage
Detection methods
Instrumentation
Tapered funnel shape
Pushes smear layer into dentin tubules
creates apical stop
Removing smear layer increases apical seal
Methods
lateral vertical
hybrid
Middle third
coronal thurd
apical third
Procedure
Assess size of apical penetreation #35 with .4 taper
Get a master GP same size as master apical file
introduce into canal WL
must fit snuggly with tug back( resistance to withdrawal)
should be .4 taper so does not penetraye beyond working length
crimp
measure and compare to WL from EAL
problems
if cone is short of working length
if cone is loose at working length
select larger cone
Choose suitable finger spreader
Warm vertical
Armantarium
Sealer
is required to allow GP to fill voids
more microleakage without
Types
GLASS IONOMER BASED
RESIN BASED
Hydrophobic
exc sealing
good flow
Antimicrobial
long setting time
CAOH
ZOE based sealer
BIOCERAMIC BASED
Gutta Percha