NiTi ?



Biological Objectives
Of the Root Canal Treatment
- Eliminate pulp and debris
- Eliminate bacteria and endotoxins
From the root canal system

The Keys to Success
IRRIGATION
Shaping (apical taper or enlargement)
3D OBTURATION
(Lateral and apical seal)

IRRIGATION  Protocole
- SODIUM HYPOCHLORITE (0,5% to 5.25%)
with
- LUBRICATING / CHELATING GEL (Glyde™)
And
- LIQUID EDTA (to eliminate smear layer)
Other solutions and irrigation devices are advocated to allow better desinfecting efficiency:
(Chlorhexidine, heat, ultrasonics, sonics…..)

Evaluation of Glyde File Prep in Combination with Sodium Hypochlorite as a Root Canal Irrigant
Grandini S. et al. J Endodon 2002 ; 28 : 300-303
« Combined use of 2.5% Sodium Hypochlorite and Glyde File Prep allowed to obtain cleaner canal
walls (less debris, less smear layer and a greater number of open dentinal tubules) than irrigation
with saline or hypochlorite alone»
_______________________________________________________

MebGlyde
GLYDE File Prep™
GlydeSeringue
- EDTA
-
- CARBAMIDE
  PEROXIDE
- HYDROSOLUBLE
  GEL (GLYDE)

Drawbacks of Conventional Hand Stainless Steel Preparation Techniques
TIME CONSUMING
LESS PREDICTABLE SHAPES IN CURVED
 CANALS
DEBRIS EXTRUSION WITH FILING MOTION
MISHAPS (ledges, canal blockade, zipping of foramen)

Advantages of
Rotary NiTi Techniques
FASTER THAN HAND PREPARATION
LESS CANAL TRANSPORTATION
MORE PREDICTABLE RESULTS
LESS DEBRIS EXTRUSION (LESS Post Op PAIN)

Constant Taper
(All instruments)
Variable Taper
(ProTaper)
Characteristics of Rotary Nickel Titanium Instruments
Cutting blades
Or
Non cutting blades
(Radial Land)
Cutting blades

     NON CUTTING BLADE
    (with Radial Land)
     ProFile, GT System, K3
CUTTING ACTIVE
 BLADE
(Hero 642, HeroShaper,
Mtwo, Alpha File, RaCe)

HeroVissé MEBHEROx100
Rotary Instrument with
a Constant taper
and Cutting Blades
have a tendency to screw-in

Requires more pressure to cut and are subjected to more stress
(surface contact is
increased)
Berutti et al.J Endodon
2003;29:15-19
Rotary Instruments with a Constant taper and a Radial Land

MEBHEROx100 HeroSectionMeb
Rotary Instrument with a large cross-section
(central mass)
and a constant taper
are too stiff in taper higher than 4% to shape curvatures without risks of mishaps