Root canal preparation techniques

Root Canal Preparation Techniques

1. ROOT CANAL PREPARATION TECHNIQUES PRESENTED BY Dr FASAHAT AHMED BUTT

2. contents Overview of root canal treatment Objectives of root canal preparations TYPES OF PREPARATIONS Filing techniques

3. Access cavity preparation Working length Initial filing Cleaning & shaping Obturation Core buildup

4. OBJECTIVES biological Complete removal of pulpal tissue bacteria mechanical Continuously tapering preparation Maintaining original anatomy Maintaining position of apical foramen Narrow apex

5. RECAPITULATION

6. TYPES OF ROOT CANAL PREPARATIONS Crown down Step back hybrid

7. Crown down Caries removal & access cavity GG drills WL # 15 k file Smaller file inserted & repeated until working length is reached Watch winding Larger file inserted

8. advantages Eliminates coronal interferences Easy access Improved distribution of irrigant Facilitates removal of debris REDUCES CHANGE IN WL DURING APICAL PREPARATION

9. Disadvantages Increased removal of tooth structure

10. Step back

11. 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

12. disadvantages Blockage of the canal may occur Irrigation can be dificult Risk of debris extrusion Alteration in working length

13. 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

14. HYBRID TECHNIQUE Canal negotiation Apical clearing WL determination MAF determination Straight line access Rotary preparation of the middle one thirds of the root Apical step back

15. advantages Less chances of ledge formation

16. Filing techniques Watch winding Reaming Filing Circumferential filing Anticurvature Balanced force technique

17. Watch winding

18. Reaming

19. Filing

20. Circumferential filing

21. Anticurvature filing

22. Balanced force technique

23. REFERENCES TORABINEJAD COHEN’S PATHWAY OF PULP GOOGLE

24. T H A N K Y O U