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
Homogenous
does not extend beyond canal orfice
Funnel shaped
no voids
NOT IDEAL OBTURATION
Overextended by 1mm or more
POOR RC HEALING
Underextended
Underfilled/non homogenous-voids 20% canal
extrusion/foriegn body reaction,
.5mm short of radio apex
Microleakage
Coronal seal
Radicular seal
Just as important as eachother
poor coronal seal will cause entry of microorg
place a glass ionomer cement over gutta percha
seals entry
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
dont completely prevent leakage
Caoh2 good as sealer
click to edit
click to edit
Post treatment apical perio
Marginal perio
Non endodontic
PTED
Mesial flute/anatomic defect
persistent apical perio
root fracture
Diffuse apical perio
Diffuse AP remission
Apical scar
Methods
Evidence
Radiographic voids
cant fill where walls are not clean
only voids cause microleakage
click to edit
Armantarium
lateral vertical
hybrid
Warm vertical
Sealer
is required to allow GP to fill voids
more microleakage without
Types
GLASS IONOMER BASED
RESIN BASED
CAOH
ZOE based sealer
BIOCERAMIC BASED
Hydrophobic
exc sealing
good flow
Antimicrobial
long setting time
Gutta Percha
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
crimp
measure and compare to WL from EAL
Choose suitable finger spreader
must fit snuggly with tug back( resistance to withdrawal)
problems
if cone is short of working length
if cone is loose at working length
click to edit
select larger cone
should be .4 taper so does not penetraye beyond working length