ProTaper Next : Tip Evaluation (1st 3mm)

ProTaperNextX2Full

DETAILS:

FILE NAME: ProTaper Next X2
COMPANY: Dentsply Tulsa Dental
MANUFACTURER: Dentsply Tulsa Dental
MADE IN: USA
WEBSITE: tulsadentalspecialties.com

 

CHARACTERISTICS:

SIZE: X2 (.25 tip/0,04-1.2 taper)
FLUTES: 4 (rectangular)
SPIRALS PER 16MM: 3
HELIX ANGLE: 18.5º [fig. 2]
CUTTING ANGLE: (-)45º [fig. 1]
DEBRIS REMOVING AREA: 46.4% [fig. 1]
ROTATION TO FAILURE: 640º (bound 5.7mm from tip)
PEAK TORQUE AT FAILURE: 10.42 gf/cm
60 ̊ DEFLECTION: 3.97 g
PLASTIC DEFORMATION: 0º
FILE CORE AREA RELATIVE TO CIRCUMFERENCE AREA: 42.9%
FILE CORE AREA RELATIVE TO FILE X-SECTION AREA: 78%

 

DISCUSSION:

  • Since the x-section is rectangular, the cutting angle meets the surface to be cut at a 45 degree angle and one might expect very little canal enlargement to occur. However, cam action resulting from the center of rotation being different from the center of mass enhances its cutting ability. Near the tip end, the file’s relatively small core area as compared to its x-sectional area and circumference, makes it more susceptible to separation (especially when sufficient torque is applied for enlargement at its midsection and handle end).

    Tip SEM

    Fig. 1

    Fig. 2

    Fig. 2

     

     

     

     

     

     

     

    SEMs are provided by Dr. Franklin Garcia-Godoy, Professor and Senior Executive Associate Dean for Research Director, Bioscience Research Center University of Tennessee Health Science Center

     

ProTaper Gold S1 : Tip Evaluation (1st 3mm)

ProTaperGoldS1Full

DETAILS:

FILE NAME: ProTaper Gold S1
COMPANY: Dentsply Tulsa Dental
MANUFACTURER: Dentsply Tulsa Dental
MADE IN: USA
WEBSITE: tulsadentalspecialties.com

 

CHARACTERISTICS:

SIZE: S1 (0.17 tip with a progressive taper)
FLUTES: 3 (convex triangle)
SPIRALS PER 16MM: 3
HELIX ANGLE: 19.1º [fig. 2]
CUTTING ANGLE: (-)31º [fig. 1]
DEBRIS REMOVING AREA: 35.8% [fig. 1]
ROTATION TO FAILURE: 310º
PEAK TORQUE AT FAILURE: 22.35 gf/cm
60 ̊ DEFLECTION: 5.39 g
PLASTIC DEFORMATION: 0º
FILE CORE AREA RELATIVE TO CIRCUMFERENCE AREA: 54%
FILE CORE AREA RELATIVE TO FILE X-SECTION AREA: 83%

 

DISCUSSION:

  • The ProTaper series of files have tapers that are not constant along the working length making comparative testing difficult. It is worth noting that the core area relative to the file’s circumference and the file’s x-section is comparatively high when measured against all other files. That is consistent with the relative high peak torque during rotation to failure. On a negative note this feature also accounts for the small debris removal area and negative cutting angle both contributing to high torsional stress during canal enlargement.

    Tip SEM

    Tip SEM

    Fig. 1

    Fig. 2

    Fig. 2

     

     

     

     

     

     

     

     

    SEMs are provided by Dr. Franklin Garcia-Godoy, Professor and Senior Executive Associate Dean for Research Director, Bioscience Research Center University of Tennessee Health Science Center