BioRaCe : Tip Evaluation (1st 3mm)

BioRaCeSEM_FullComposite

DETAILS:

FILE NAME: BioRaCe
COMPANY: Brasseler USA
MANUFACTURER: FKG Dentaire
MADE IN: Switzerland
WEBSITE: brasselerusadental.com

 

CHARACTERISTICS:

SIZE: 25/04
FLUTES: 3
SPIRALS PER 16MM: 3.33
HELIX ANGLES: 28.4º & 4.6º [fig. 2]
CUTTING ANGLE: (-)30º [fig. 1]
DEBRIS REMOVING AREA: 55% [fig. 1]
ROTATION TO FAILURE: 1060º
PEAK TORQUE AT FAILURE: 61.06 gf/cm
60 ̊ DEFLECTION: 4.82 g
PLASTIC DEFORMATION: 0º
FILE CORE AREA RELATIVE TO CIRCUMFERENCE AREA: 28%
FILE CORE AREA RELATIVE TO FILE X-SECTION AREA: 62%

 

DISCUSSION:

  • Note that the nearly non-spiraled sections along the working length provide an area that can become more easily spiraled when rotational torsion is applied. The result is relatively high rotation to failure but added no significant increase in peak torque. It is also important to remember that 3 rotations, once bound, only requires 0.6 seconds to fail while rotating at 300 rpm.

    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

     

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Sequence ESX : Tip Evaluation (1st 3mm)

DETAILS:

FILE NAME: Sequence ESX
COMPANY: Brasseler USA
MANUFACTURER: FKG
MADE IN: Switzerland
WEBSITE: brasselerusadental.com

 

CHARACTERISTICS:

SIZE: 25/04
FLUTES: 3 (triangular)
SPIRALS PER 16MM: 2.67
HELIX ANGLE: 9.5º [fig. 2]
CUTTING ANGLE: (-) 30º [fig. 1]
DEBRIS REMOVING AREA: 55% [fig. 1]
ROTATION TO FAILURE: 560º
PEAK TORQUE AT FAILURE: 88.57 gf/cm
60 ̊ DEFLECTION: 2.32 g
PLASTIC DEFORMATION: 0º
FILE CORE AREA RELATIVE TO CIRCUMFERENCE AREA: 28%
FILE CORE AREA RELATIVE TO FILE X-SECTION AREA: 62%

 

DISCUSSION:

  • Manufacturer claims a booster tip comprised of 6 cutting sides but its sides are so small that they actually form a non-cutting tip. The tip will not negotiate a canal having a smaller diameter without burnishing its way into the canal and resulting in greater torsional stress.
  • The finish is excellent and the blades are sharp.
  • Testing shows the recommendation of using 2-3 files is overly ambitious as is the recommended use of long strokes for insertion.

TIP SEM

Fig. 1 : TIP X-SECTION

Fig. 2

 

 

 

 

 

 

 

 

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Introduction to Mastering Endodontic Instrumentation : An online addendum

Screen Shot 2015-02-04 at 7.24.00 PM

What differences do design differences make? We intend to find out. We are embarking on a very ambitious research program to test each part of every major file in production, from tip to handle. We have completely up-dated the computer controlled Endo File Evaluator to improve resolution of its sensors and motors and to expand its capability for performing new testing protocols. As such, we have created what I believe is not only the most objective means for evaluating endodontic files, but also the best method for testing file functions in a manner that is truly relevant within a clinical setting. We do this while letting the data determine the results for objective comparisons independent of operator skill or marketing bias.

What difference does this endeavor make? Our first objective is to finally determine how to minimize risk and maximize efficiency, how file designs relate to function, how function relates to canal anatomy, and how anatomy relates to technique. Our second objective is to present the Endo File Evaluator results using the numerous different parameters for testing, and to use high resolution images and SEMs in a manner that allows clinicians to save and apply the information to enhance their skill and treatment.

How will this process take place? About every ten days we will share test results and observations of only one segment of each file beginning with the file tips. Through this blog, we invite you to participate in discussions and critiques to create group research dynamics as this project progresses. Once all segments of the files have been covered, a composite of each whole file will be available as an endodontic reference along  with any contributing assessments gathered from our readers. We will continue providing results as we find them through this comprehensive series of evaluations and add to them in the future as needed. We are excited to embark on this endeavor and hope you will follow along and contribute your own thoughts and impressions.

 

DOWNLOAD MASTERING ENDODONTIC INSTRUMENTATION (original award winning text)

 

What differences do endo file design differences make?

Screen Shot 2015-02-04 at 7.24.00 PM

What differences do design differences make? We intend to find out. We are embarking on a very ambitious research program to test each part of every major file in production, from tip to handle. We have completely up-dated the computer controlled Endo File Evaluator to improve resolution of its sensors and motors and to expand its capability for performing new testing protocols. As such, we have created what I believe is not only the most objective means for evaluating endodontic files, but also the best method for testing file functions in a manner that is truly relevant within a clinical setting. We do this while letting the data determine the results for objective comparisons independent of operator skill or marketing bias.

What difference does this endeavor make? Our first objective is to finally determine how to minimize risk and maximize efficiency, how file designs relate to function, how function relates to canal anatomy, and how anatomy relates to technique. Our second objective is to present the Endo File Evaluator results using the numerous different parameters for testing, and to use high resolution images and SEMs in a manner that allows clinicians to save and apply the information to enhance their skill and treatment.

How will this process take place? About every ten days we will share test results and observations of only one segment of each file beginning with the file tips. Through this blog, we invite you to participate in discussions and critiques to create group research dynamics as this project progresses. Once all segments of the files have been covered, a composite of each whole file will be available as an endodontic reference along  with any contributing assessments gathered from our readers. We will continue providing results as we find them through this comprehensive series of evaluations and add to them in the future as needed. We are excited to embark on this endeavor and hope you will follow along and contribute your own thoughts and impressions.

The Emperor’s Clothes; Making the Invisible Visible

emporer

The ability to provide unparalleled critical information about teeth and their surrounding tissues has been transformed with the development of 3-D imaging systems such as Cone Beam Computed Tomography. Our knowledge is no longer limited to conventional intra-oral radiographs that represent a two-dimensional view of three-dimensional anatomic structures. Our two-dimensional interpretations can now be replaced with a vast array of three-dimensional data that are more apparent and more applicable for statistical analyses.

We might say that the testing of endodontic files is undergoing a comparable transformation. We are no longer limited to two image representations of a file, (1) the image resulting from scientific research encompassing only one feature of a file and (2) the image resulting from claims of marketing, the emperor’s clothes. The clinical simulator used by NanoEndo to compare files has the ability to precisely determine and record the extent of a file’s capabilities under various circumstances and simultaneously assess its efficacy compared to that of other files. This development is an important step towards being able to distinguish between hype and useful information and may radically change the dentist’s ability to evaluate files. NanoEndo aspires to be the one that points out, “But he isn’t wearing anything at all!” and to make a file’s proficiencies apparent and assessable to all. Is it marketing or is a file carrying a $19 price tag that valuable? Is a $4 price tag cheap? We can provide unbiased computerized testing; you can make the judgement.

 

The file is a Sequence EXS 25/04 before testing. The claim: allows for stress free apical progression and clearing of debris while respecting even the most challenging canal anatomy. The patented BT Tip™ features 6 cutting edges, for increased cutting efficiency. This revolutionary design allows for the use of fewer instruments per treatment. Retail price: $19.33 per file.

The file is a Sequence EXS 25/04 before testing. The claim: allows for stress free apical progression and clearing of debris while respecting even the most challenging canal anatomy. The patented BT Tip™ features 6 cutting edges, for increased cutting efficiency. This revolutionary design allows for the use of fewer instruments per treatment. Retail price: $19.33 per file.

 

This is the same Sequence EXS 25/04 shown above after testing (refer to: https://nanoendo.com/evaluator-v2.php). Reason for failure: The claim features 6 cutting edges at its tip but close inspection shows smooth edges until the greatest tip diameter, 0.25mm, is reached. This causes the tip to have to burnish its way into a canal that has a diameter smaller than 0.25mm. The stress causes the tip to unwind. As the tip unwinds debris in the flutes becomes trapped and causes greater stress from abrasion.

This is the same Sequence EXS 25/04 shown above after testing (refer to: Endo File Evaluator). Reason for failure: The claim features 6 cutting edges at its tip but close inspection shows smooth edges until the greatest tip diameter, 0.25mm, is reached. This causes the tip to have to burnish its way into a canal that has a diameter smaller than 0.25mm. The stress causes the tip to unwind. As the tip unwinds debris in the flutes becomes trapped and causes greater stress from abrasion.

The file is a One Endo file after testing (refer to: Endo File Evaluator). Reason for success: Sharp cutting edges extend very close to the actual tip end, yet opposite the cutting edge the tip is smooth enabling it to follow the canal. Retail price: $11.25 per file with frequent discounts.

The file is a One Endo file after testing (refer to: Endo File Evaluator). Reason for success: Sharp cutting edges extend very close to the actual tip end, yet opposite the cutting edge the tip is smooth enabling it to follow the canal. Retail price: $11.25 per file with frequent discounts.