ROOT CANAL PREPARATION TECHNIQUES

PRESENTED BY

DR FASAHAT AHMED BUTT

CONTENTS

• OVERVIEW OF ROOT CANAL TREATMENT

• OBJECTIVES OF ROOT CANAL PREPARATIONS

• TYPES OF PREPARATIONS

• FILING TECHNIQUES

Access cavity preparation

Working length

Initial filing

Cleaning & shaping

Obturation

Core buildup

OBJECTIVES

BIOLOGICAL

COMPLETE REMOVAL OF

• PULPAL TISSUE

• BACTERIA

MECHANICAL

• CONTINUOUSLY TAPERING

PREPARATION

• MAINTAINING ORIGINAL

ANATOMY

• MAINTAINING POSITION OF

APICAL FORAMEN

• NARROW APEX

RECAPITULATION

TYPES OF ROOT CANAL PREPARATIONS

• CROWN DOWN

• STEP BACK

• HYBRID

CROWN DOWN

Caries removal & access cavity

GG drills

WL#15 k file

Smaller file inserted & repeated until

working length is reached

Watch windingLarger file inserted

ADVANTAGES

• ELIMINATES CORONAL INTERFERENCES

• EASY ACCESS

• IMPROVED DISTRIBUTION OF IRRIGANT

• FACILITATES REMOVAL OF DEBRIS

• REDUCES CHANGE IN WL DURING APICAL PREPARATION

DISADVANTAGES

• INCREASED REMOVAL OF TOOTH STRUCTURE

STEP BACK

ADVANTAGES

• APICAL PREPARATION KEPT SMALL

• REDUCES PROCEDURAL ERRORS

• IMPROVES DEBRIDEMENT

• SMALLER FLEXIBLE INSTRUMENTS ARE USED IN THE APICAL REGION

WHILE LARGER USED SHORT OF THE APEX

DISADVANTAGES

• BLOCKAGE OF THE CANAL MAY OCCUR

• IRRIGATION CAN BE DIFICULT

• RISK OF DEBRIS EXTRUSION

• ALTERATION IN WORKING LENGTH

ADVANTAGES

• IT PERMITS CANAL MORPHOLOGY TO DICTATE PREPARATION SHAPE

• DOES NOT REQUIRE FORCING OF FILES INTO CANAL THAT CANNOT

ACCOMMODATE THEM

• MINOR CANAL OBTURATION

• SLIGHT ENLARGEMENT OF THE CANAL IN APICAL TO CORONAL DIRECTION

HYBRID TECHNIQUECanal

negotiation

Apical clearing

WL determination

MAF determination

Straight line access

Rotary preparation of the middle one thirds

of the root

Apical step back

ADVANTAGES

• LESS CHANCES OF LEDGE FORMATION

FILING TECHNIQUES

• WATCH WINDING

• REAMING

• FILING

• CIRCUMFERENTIAL FILING

• ANTICURVATURE

• BALANCED FORCE TECHNIQUE

WATCH WINDING

REAMING

FILING

CIRCUMFERENTIAL FILING

ANTICURVATURE FILING

BALANCED FORCE TECHNIQUE

REFERENCES

• TORABINEJAD

• COHEN’S PATHWAY OF PULP

• GOOGLE

THANK YOU