Endodontic Files

ONE-ENDO-FILES
$67.50 / ea

 

Obtura Spartan ONE ENDO™ File System

Introducing the ONE ENDO™ File, the first of a new type of file design; one based wholly upon evidence with no constraints of conventional design. The ONE ENDO File represents the first next-step in Dr. John T. McSpadden’s decades-long pursuit of the ideal endodontic file. Every millimeter of its design was carefully considered from its tip to its handle. The result is the best all-around performing file we’ve ever tested.

The ONE ENDO File’s two unequally tapered flutes feature fewer spirals at the tip to resist screwing-in forces while its self-piloting cut-flip-tip reduces binding in the canal. Further up the working length, the ONE ENDO File’s smaller tapered flute enhances flexibility while its larger counterpart provides superior strength and cutting efficiency. A progressive heat treatment to is applied to ONE ENDO File sizes 30-.06 and larger to ensure even the largest sizes retain excellent flexibility. Combined, these progressive flexibility modifications make the ONE ENDO File the best over-all performing file.*



TESTIMONIALS

Dr. Andrew Powell-Cullingford:
“I have very much enjoyed the One Endo files, they work well in all clinical cases, whether treating calcified, curved, irregular cross section or in retreatment. “
Dr. Andrew Powell-Cullingford is a member of the American Association of Endodontists, and a member and past President of the British Endodontic Society. Dr. Powell-Cullingford established his own private Endodontic Training Centre at Fairoak, the first of its kind in the UK, and continues to lecture throughout Europe..


Derek Thomas Peek DDS, MS:
“The One Endo file's design gives me the ability to shape walls with uninhibited debris removal because of the two unique unequal tapers. Having made a study of different files during my residency, One Endo files insure a cleanliness unmatched by any other file on the market.”
Derek Peek DDS, MS graduated from the University of Oklahoma College of Dentistry before completing his endodontic residency at the Louisiana State University School of Dentistry where he received his Endodontic Certificate and Masters of Science degree. Dr. Peek now practices at Cedar Rapids Endodontics, P.C. and is an active member of the American Association of Endodontics, American Dental Association, Iowa dental Association and the Linn County Dental Society. 



*Internal data on file. Express opinion of NanoEndo based on testing data.

TAPER
  • Description
  • Features
  • Instructions
  • Zone Technique
  • FAQ's
  • Videos

Introducing the ONE ENDO™ File, the first of a new type of file design; one based wholly upon evidence with no constraints of conventional design. The ONE ENDO File represents the first next-step in Dr. John T. McSpadden’s decades-long pursuit of the ideal endodontic file. Every millimeter of its design was carefully considered from its tip to its handle. The result is the best all-around performing file we’ve ever tested.

The ONE ENDO File’s two unequally tapered flutes feature fewer spirals at the tip to resist screwing-in forces while its self-piloting cut-flip-tip reduces binding in the canal. Further up the working length, the ONE ENDO File’s smaller tapered flute enhances flexibility while its larger counterpart provides superior strength and cutting efficiency. A progressive heat treatment to is applied to ONE ENDO File sizes 30-.06 and larger to ensure even the largest sizes retain excellent flexibility. Combined, these progressive flexibility modifications make the ONE ENDO File the best over-all performing file.*

TESTIMONIALS

Dr. Andrew Powell-Cullingford:
“I have very much enjoyed the One Endo files, they work well in all clinical cases, whether treating calcified, curved, irregular cross section or in retreatment. “
Dr. Andrew Powell-Cullingford is a member of the American Association of Endodontists, and a member and past President of the British Endodontic Society. Dr. Powell-Cullingford established his own private Endodontic Training Centre at Fairoak, the first of its kind in the UK, and continues to lecture throughout Europe..

Derek Thomas Peek DDS, MS:
“The One Endo file's design gives me the ability to shape walls with uninhibited debris removal because of the two unique unequal tapers. Having made a study of different files during my residency, One Endo files insure a cleanliness unmatched by any other file on the market.”
Derek Peek DDS, MS graduated from the University of Oklahoma College of Dentistry before completing his endodontic residency at the Louisiana State University School of Dentistry where he received his Endodontic Certificate and Masters of Science degree. Dr. Peek now practices at Cedar Rapids Endodontics, P.C. and is an active member of the American Association of Endodontics, American Dental Association, Iowa dental Association and the Linn County Dental Society. 

 

  • The One Endo File incorporates two unequal tapers, side by side, within the same instrument. This patented design affords the One Endo File superior flexibility, reduced torque loading, and an improved ability to remove debris. While its larger tapered cutting edge engages the canal wall, its opposing smaller tapered edge provides additional space for breaking down and removing debris. This eliminates excess friction caused by debris build up and equalizes pressure on the file’s cutting edge as it engages the canal wall.
 

  • The One Endo File’s larger taper extends through the end of the file’s tip creating a “cut-flip” tip. Resembling a thick spoon with a sharpened edge, the tip’s blade effectively forms dentinal chips while its opposite side’s curved surface acts as a self-guided pilot. The result is a flexible tip that manages torsion, reduces canal transportation, quickly pulls debris away, and nearly eliminates the tendency to bind in the canal.
 

  • The ONE ENDO File line employs a progressive heat treatment protocol. Heat treatment is only used on larger-diameter file sizes as needed, balancing flexibility with torsional resistance.

 
 
Create Straight-Line Access
• Use Spartan Ultrasonic tips to refine canal openings to achieve straight line access for safe and efficient use of the ONE ENDO Files.
• Establish working length and create a glide path for ONE ENDO Files with hand instruments.
 
Shaping Guidelines
• Although the ONE ENDO Files are effective using any technique, extensive testing has consistently indicated that the following will maximize efficiency and minimize stress:*
• Advance into the canal using no more pressure than was required to advance the first 1 mm.
• Engage no more than 6 mm of a file if it is used in a severe curvature.
• Advance a file into the canal in no more than 1 mm increments with insertion/withdrawal motions.
• Advancement into the canal should occur at a rate of approximately 0.5 mm/s without increasing the pressure of insertion.
• Withdrawing at a rate greater than the rate of insertion improves debris removal.
• Follow the use of one file with a file having a different taper. 
 
For additional technique guidelines, please consider the McSpadden Zone Technique at www.obtura.com/zone-technique. Obturation of Canal Systems Shaped with ONE ENDO Files The ONE ENDO Files are ISO- sized and tapered, and can accommodate any obturation technique; however, warm gutta-percha obturation systems, such as the Obtura III MAX™, have been shown to provide a more dense obturation than other techniques.**
The ONE ENDO File line employs a progressive heat treatment protocol. Heat treatment is only used on larger-diameter file sizes as needed, balancing flexibility with torsional resistance.
RECOMMENDED HANDPIECE SETTINGS: 500-600 RPM TORQUE: 300-500 G-CM 
 

* Internal data on file. Express opinion of NanoEndo based on testing data.

**Comparison of the Obturation Density of Cold Lateral Compaction versus Warm Vertical Compaction using the Continuous Wave of Condensation Technique." Journal of Endodontics: Volume 31, Issue 1, pages 37-39, January 2005. Authors: Christopher S. Lea, DDS, Michael J. Apicella, DDS, Pete Mines, DDS, Peter P Yancich, DDS, M. Harry Parker, DDS, MS.

To prepare a canal in the quickest and safest manner, always adhere to the following guidelines:

• Follow the use of one file with a file having a different taper.
• Advance a file into the canal with no more than 1mm increments using insertion/ withdrawal, pecking type motions. Withdrawing at a rate greater than the rate of insertion improves debris removal.
• Once engaged, advance into the canal using no more pressure than was required to advance the first 1mm. If more pressure is required or if advancement cannot be made with the same pressure, change files.
• Advancement into the canal should be able to occur at a rate of approximately 0.5mm/s without increasing the pressure of insertion. If additional pressure is required to maintain this rate of advancement, change files.
• For files larger than 20/.02, never engage more than 6mm of the file in a curvature. If engagement is greater than 6mm, change to a smaller file.
• Prepare canals using the Zone Technique

 Download PDF

Are ONE ENDO Files simple rotary or reciprocating instruments?

The ONE ENDO File may be used as both a reciprocating and rotary file. For use as a reciprocating instrument however, the greatest angle of rotation must be clockwise as the ONE ENDO File will not cut during a counter-clockwise rotation.

 

At what speed should the One Endo File be used?

We recommend setting your speed to 550rpm.

 

What handpiece should I use with the ONE ENDO File?

The ONE ENDO File is not dependent upon a specific handpiece, nor do we recommend one particular brand over another.

 

What does testing tell us about avoiding file cyclic fatigue?

With the frequency of curvatures, we should assume their presence in a plane that is not apparent on radiographic examination. Only with very careful consideration of variations in the pressure required for progressing into the canal do we determine if curvatures are threatening file failure. One of the greatest problems in making that determination is the force required for rotating a large diameter file relative to the force necessary to progress through a curvature. Gauging the depth that the file can be inserted into the canal, before the file is rotated, can be especially helpful in determining the resistance due to curvature as opposed to the resistance caused by a constricted canal. Knowing the limitations of the file size and taper determined from testing, and their relationship to the canal anatomy, can definitely improve the ability to avoid file failures due to fatigue or torsion.

 

How does your clinical simulator testing differ from testing recommended ADA specifications?

To test the validity of claims for file designs, a computerized clinical simulator was constructed to simultaneously measure torque, pressure, and time, during the prescribed use of instruments, to determine efficiency and the threat of file failure. The simulator A computer provides the means for precisely duplicating motions designed to simulate clinical applications for comparing different instruments rather than using a very specific circumstance for testing.

 

While eliminating operator variability and conforming to operation recommendations, computer programming can control the preparation parameters for the depth and the speed of file insertion and withdrawal, as well as the speed of file rotation. Not only can the stress of the force of insertion and torsion of each individual file size and taper be measured under different circumstances, but also the stresses, using different file sequences, can be recorded in order to determine the least stressful and most expeditious technique approaches.

 

All measurements are plotted over time to illustrate when and how stress occurs. Rather than measuring the over-all flexibility of the file, the simulator device can be used to measure dynamic flexibility, recording the resistance to bending as a rotating file progresses onto an inclined plane or simulated curved canal. The measurement occurs over time as different diameters and cross section configurations of the file transverse a curvature.

 

The logged data help determine the methods for which each instrument may be used most effectively while minimizing the threat of failure. The simulations can be applied to different anatomies and technique solutions quickly become apparent, rather than having to rely on subjective and time consuming trial and error experience that lack the benefit of controls. An examination of the results puts the manufacturer’s technique recommendations in perspective, validating or invalidating their claims. Identifying technique enhancements and file design improvements become more feasible. The results can be used to substantially enhance efficiency and may be surprisingly different from what has been recommended.

 

Irrigation and lubrication can reduce torque requirements by as much as 400% compared to rotating in a dry canal. However, shorter strokes of insertion can be more effective than carrying the rotating file to greater depths into the canal with fewer insertions, even with irrigation. The percentage of the file engaging dentin plays an important role in influencing the torque reduction resulting from lubrication or clearing of debris by irrigation.

 

When the rotating file becomes engaged for more than a few millimeters, the interface of irrigation is reduced between the surface of the canal and the file. This has little effect in reducing torsion, since any irrigation has little opportunity to penetrate the additional distance with the file due to the rotating file moving the irrigating solution in a coronal direction. This is especially the case when the irrigation is intermittent rather than constant and the insertion of the file is continuous rather than being done in shorter strokes. The use of a handpiece, having a tubular connection with an irrigation pump, can be beneficial even with a short stroke technique, not so much for lubricity, but for the elimination of debris before its accumulation contributes to resistance of rotation.