Assessment: Today, no NiTi system on the market enables a dynamic upward removal of dentine debris.

2. Assessment: Today, no NiTi system on the market enables a dynamic upward removal of dentine debris. Bibliographical reference : « An instrument innovation for initial endodontic treatment: The Revo-S» Dr Franck DIEMER et Dr Jean-Philippe MALLET – Clinic, November 2008, vol. 29.

3. Goals: Design a set of instruments that enable an upward elimination of the dentine debris and an optimal root canal cleaning

4. How? • The quality of the upward removal of dentine debris depends on the main cutting edges characteristics • - Pitch length • - Flutes depth • Orientation of the edges (helix and cutting angles) • + in addition, an innovation point = the asymmetrical cross section =>

5. Asymmetrical cross section clockwise The canal axis has 3 cutting edges, located on 3 different radiuses: R1, R2 and R3. “Snake-like” movement of the instrument inside the root canal

6. What are the advantages of the asymmetrical cross section? • Enables a better root canal penetration owing to a “snake-like” movement = better guidance of the instrument up to the apical region of the root canal. • Facilitates the upward elimination of dentine shavings up to the coronal region owing to a bigger available volume. • - Avoids flutes obstruction and therefore the zipping of the dentine debris beyond the instrument tip.

7. What are the advantages of the asymmetrical cross section? • Less stress on the instrument owing to the movement of the file along the root canal walls: • No screwing effect • More flexibility • Better ability to negotiate curves.

8. Cycle Video

9. The instrument works in a cyclic way: 1. Cutting 2. Clearance 3. Cleaning

10. Why talking about a « cutting, clearance and cleaning » cycle? SC1 and SU work individually inside the root canal in a cyclic way: Cutting, clearance, cleaning thanks to the advantages of the asymmetrical cross section. However, each instrument has a specific action in that cycle: SC1 = Cutting SC2 = Clearance owing to its equilateral section (debris elimination) SU = Cleaning

11. Basic sequence with only3 instruments! This technique is more simple to use and adapted for most root canal anatomies.

12. Basic sequence 2 root canal cleaning and shaping instruments Finishing instrument: recapitulates and cleans

13. The protocol WL WL WL

14. SC1 and SC2

15. Advantages of SC1 & SC2 • Inactive tip • Extended helical machining up to the coronal region increases the instrument flexibility. • Less stress on the instrument • Better debris elimination and more efficient cleaning owing to the asymmetrical cross section of the SC1. • No zipping

16. The SU instrument

17. The root canal finishing • SU smoothes the root canal walls. • Owing to its asymmetrical cross section, it recapitulates the action of the first two instruments SC1 and SC2, thus respecting the tapered shape of the canal. • It performs excellent upward elimination of the dentine debris and an improved cleaning. • An adequate canal preparation with an apical finishing of.06.

18. Root canal cleaning and shaping + finishing SC1 Active length 21mm Active length asymmetrical section 12.5 mm SU, asymmetrical cross section, recapitulates the action of the first 2 instruments. SC2 Equilateral section

19. Why does not SC2 have an asymmetrical cross section? • The equilateral section: • - brings strength. • ensures a perfect guidance of the instrument owing to the balance of the forces • enables the patency of the root canal (after MMC15) until the apical constriction (or preparation apical limit).

20. The MICRO-MEGA® + • For a successful canal preparation, apical finishing is essential: MICRO-MEGA® offers an additionnal adapted solution with specific instruments: AS30 AS35 AS40

21. The apical finishing

22. The protocol WL WL WL

23. The apical finishing • Shaping down to the working length. • Essential for an accurate finishing of the apical third. • The irrigating solution penetrates to the apical third. • Efficient disinfection. • Optimal cleaning.

24. AS30 AS35 AS40 Advantages • Instruments dedicated to the apical zone are tapered at .06. • Asymmetrical cross section • Extended helical machining up to the coronal region Increased flexibility and performance of the instrument for a successful apical finishing.

25. Why using .06 taper instruments at the end of the treatment ? Tapering at .06 enables a debridement and a disinfection corresponding to biological constraints of the initial root canal treatment.  Improved flow of the irrigating solution in the canal.  Facilitated obturation.

26. Clinical case Clinical case of Dr JP Mallet: UL6 shows secondary pulpitis with a carious lesion on the distal aspect observed on preoperative radiographs (eccentric and centric incidence). Root canal shaping using the Revo-S® sequence with an apical shaping adapted for each canal (mesolabial ML1 & 2 canals: AS 30 ; distolabial DL canal: AS 35 and palatal canal: AS 40).

27. Classics and InGeT® packaging • Pack of 6 assorted instruments SC1, SC2, SU, AS30, AS35 and AS40 • Pack of 3 assorted instruments SC1, SC2 and SU • Pack of 3 assorted instruments AS30, AS35 and AS40 • Pack of 6 SC1instruments • Pack of 6 SC2 instruments • Pack of 6 SU instruments • Pack of 6 AS30 instruments • Pack of 6 AS35 instruments • Pack of 6 AS40 instruments

28. The Classics kits • 1 pack of 6 SC1 instruments • 1 pack of 6 SC2 instruments • 1 pack of 6 SU instruments • 2 packs of 3 assorted AS30-AS35-AS40 instruments • 1 pack of 4 ENDOFLARE® instruments • 1 Revo-S® stainless steal tray • - 1 AX’S Endo contra-angle • Ref: 51400066

29. The InGeT Kits • 1 pack of SC1 6 instruments • 1 pack of 6 SC2 instruments • 1 pack of 6 SU instruments • 2 packs of 3 assorted AS30-AS35-AS40 instruments • 1 pack of 4 ENDOFLARE® instruments • 1 Revo-S® stainless steal tray • - 1 InGeT contra-angle • Ref: 51400067

30. Thank you for your attention