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

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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

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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