Root canal preparation techniques

Objectives of Root canal preparation

• Remove remaining pulp tissue
• Eliminate microorganism
• Remove debris
• Shape the root canal
• So that root canal system can be cleaned and filled

Requirements of Root canal preparation

•  Prepared canal should include the original canal
• Apical constriction should be maintained
• Canal should end in an apical narrowing
• Canal should be tapered from crown to apex
• Preparation should be undertaken with copious irrigation
• The final length of the preparation should not be reduce by treatment

Root canal preparation techniques
Apical to coronal	Coronal to  apical
1.Standardized technique 2. Step back technique 3. Balanced forces technique Apical to coronal	1 Step down technique 2.Double flared technique 3. Crown down pressure less technique Coronal to  apical

Standardized technique

Standardized technique

• Can be use for straight tiny canal
• Unsuitable for curve canals
• Common problems

                    Ledging

                    Zipping

                    Elbow formation

                    Perforation

                    Loss of working length

Step back technique

Step back technique

• Overcomes procedural errors of ST
• Suitable for Slight to moderate curve canals
• Not suitable for severely curve canals
• Can be improve by

                    Specific filing technique

                    Non-cutting tip

                    Flexible files
PPT Note on Root Canal Preparation Techniques

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