Lecture 8Lecture 8

Obturation of the RCSObturation of the RCS

DYD SamarawickramaDYD Samarawickrama

20072007

Note : Copyright material has been removed.Note : Copyright material has been removed.

Coronal seal

Root Canal Filling

Success of ObturationSuccess of Obturation

Quality of access cavity designQuality of access cavity design

Thorough Thorough cleaningcleaning and and shaping shaping of the RCSof the RCS

Well filled Root Canal SystemWell filled Root Canal System

Prevents percolation of periapical Prevents percolation of periapical exudate into the root canal space exudate into the root canal space Prevents rePrevents re--infectioninfectionCreates a favourable biologic Creates a favourable biologic environment for the process of environment for the process of tissue healingtissue healing

When to ObturateWhen to Obturate

Tooth is asymptomaticTooth is asymptomaticCanal is dryCanal is dryNo sinus tractNo sinus tractNo foul odourNo foul odourIntact temporary fillingIntact temporary filling

Root Canal Filling MaterialsRoot Canal Filling Materials

PastesPastesSemisolidSemisolid

PastesPastes

Zinc Oxide Zinc Oxide –– Eugenol sealersEugenol sealersCalcium hydroxide sealersCalcium hydroxide sealersSynthetic resinsSynthetic resinsEpoxy resinsEpoxy resinsAcrylic, polyethylene and Acrylic, polyethylene and polyvinyl resins polyvinyl resins

GrossmanGrossman’’s Sealers Sealer

PowderPowder Zinc oxideZinc oxideStabelyte resinStabelyte resinBismuth subcarbonateBismuth subcarbonateBarium sulphateBarium sulphateSodium borateSodium borate

LiquidLiquid EugenolEugenol

Zinc Oxide Sealer

Zinc Oxide Eugenol Sealers

Calcium Hydroxide SealersCalcium Hydroxide Sealers

Resin Based Sealers

Semi Semi -- solidsolid

Gutta PerchaGutta Percha

ResilonResilon

Gutta Percha Gutta Percha -- AdvantagesAdvantages

Adaptable and Adaptable and compactablecompactableSoftened by heat Softened by heat or solventsor solventsInert and tissue Inert and tissue toleranttolerantDimensionally Dimensionally stablestable

RadioRadio--opaqueopaqueWill not stain Will not stain tooth structuretooth structureEasily removed Easily removed from canalfrom canalNon allergenicNon allergenic

Gutta Percha Gutta Percha -- DisadvantagesDisadvantages

Lacks rigidity Lacks rigidity --> freeze > freeze --> rigid> rigidLacks adhesive qualityLacks adhesive qualityCan be displaced by pressureCan be displaced by pressure

Bonded ObturationBonded Obturation

ResilonResilon

EpiphanyEpiphanyRealSealRealSeal

Obturation TechniquesObturation Techniques

Lateral and Vertical CondensationLateral and Vertical CondensationThermafilThermafilMicrosealMicrosealObtura IIObtura IISystem BSystem BMiscellaneousMiscellaneous

Obturate in 3DObturate in 3D

Conventional radiographic viewConventional radiographic view

ObturationObturation

Radiographs do not show poor Radiographs do not show poor obturation in 3Dobturation in 3DTramlines might give a clueTramlines might give a clue

ObturationObturation

Examples of poor obturationExamples of poor obturation

HoweverHowever……..

The apical extent of root filling has The apical extent of root filling has significant influence on outcome:significant influence on outcome:–– Flush root fillings have higher success Flush root fillings have higher success

rates than short or long root fillingsrates than short or long root fillings–– Meta analyses 28 studiesMeta analyses 28 studies

Short> 2 mm short of the radiographic apex

Flush0 – 2 mm within the radiographic apex

LongExtruded beyond radiographic apex

Obturation TechniquesObturation Techniques

Lateral and Vertical CondensationLateral and Vertical CondensationThermafilThermafilMicrosealMicrosealObtura IIObtura IISystem BSystem BMiscellaneousMiscellaneous

Obturation TechniquesObturation Techniques

Lateral and Vertical CondensationLateral and Vertical CondensationThermafilThermafilMicrosealMicrosealObtura IIObtura IISystem BSystem BMiscellaneousMiscellaneous

Obturation TechniquesObturation Techniques

Lateral and Vertical Lateral and Vertical condensationcondensationThermafilThermafilMicrosealMicrosealObtura IIObtura IISystem BSystem BMiscellaneousMiscellaneous

Bonded ObturationBonded Obturation

ResilonResilon

EpiphanyEpiphanyRealSealRealSeal

ResilonResilon

Thermoplastic synthetic polymer Thermoplastic synthetic polymer root canal filling materialroot canal filling material

PrimerPrimerSealerSealerCore materialCore material