Presentation on theme: "Assessment: Today, no NiTi system on the market enables a dynamic upward removal of dentine debris. Bibliographical reference : « An instrument innovation."— Presentation transcript:
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.
Goals: Design a set of instruments that enable an upward elimination of the dentine debris and an optimal root canal cleaning
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 =>
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 Asymmetrical cross section clockwise
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.
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.
The instrument works in a cyclic way: 1. Cutting 2. Clearance 3. Cleaning
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
Basic sequence with only3 instruments! only 3 instruments! This technique is more simple to use and adapted for most root canal anatomies.
Basic sequence 2 root canal cleaning and shaping instruments Finishing instrument: recapitulates and cleans
The protocol WL
SC1 and SC2
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
The SU instrument
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.
Root canal cleaning and shaping + finishing SC2 Equilateral section SC1 Active length 21mm Active length asymmetrical section 12.5 mm SU, asymmetrical cross section, recapitulates the action of the first 2 instruments.
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).
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
The apical finishing
The protocol WL
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.
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.
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.
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).
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
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:
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: