Introducing the New
Xtreme Reamer with RSS (Rapid
(a giant leap
forward in endodontics by Break-R-Way)
2X Faster 10X Safer... with
Upgraded the Break-R-Way
With the breakthrough, Xtreme Reamers it is now
possible to, rapidly and safely, shape the canal spaces with
Patent Pending on the Xtreme Reamer with High Strength Hybrid
Cutting Flute upgraded the Break-R-Way. This is how it works...
1. It is not necessary to buy more special
Xtreme Reamers can even be used with a standard, (20,000 rpm),
dental slow speed hand piece.
2. Xtreme Reamers are technique insensitive as
broken or separated rotary instruments can easily be retrieved
by dental assistants.
3. Instead of marking Xtreme Reamers until a
predetermined scrap date, they can be used until
4. Patients are very grateful to have shorter,
one visit, root canal treatments and more patients can be
treated per day.
Please click here to read more about the New Xtreme Reamer...
Making NiTi Rotary File Separation a Non-Issue
(Information about the Patented
By Duane E Cox, D.M.D.
This presents a new approach to solving NiTi Rotary file separation. The author gives detailed information on how engineering controls placed in the rotary files can make the separated files easily retrievable.
Anxiety for clinicians is a recurring problem over
concerns of the Ni-Ti rotary file separation. It is well
documented in the dental literature how difficult or
impossible a file segment is to remove. Also documented are
the consequences and protocol for informing patients and
referral to an endodontist.
Current solutions offered are numerous but not 100%
- recommendations to single use file
- using the files at very low rpm's
- using files in a crown down technique
- using light apical forces
- using apical forces briefly, etc.
Engineering controls have not been built into the files
previously publicly presented
It is readily apparent to the dental clinician how Gates
Glidden burs always separated near the handle. By contrast,
Ni-Ti rotary files when over stressed, separate in the smaller
diameter section of the cutting flutes.
When threaded pins were popular, they were designed to shear
at a pre-determined location on the pin. The research began
with this point. The spring and summer of 2003 were spent
developing the idea, patent searching and having custom
An annular groove method to modify existing Ni-Ti rotary
files could be used in the fall of 2003. It was difficult to achieve
the desired precision of within 0.01mm. The most difficult
question to solve was exactly how much to weaken the files at
the SSP (safe separation point).
If the modified files were overly weakened, they would
easily break at the SSP without doing much work. On the other
hand, if the files were not weakened sufficiently, they would
deform and/ or separate as before.
A process was developed by experimentation/elimination to
within 0.01mm the optimum diameter to leave at the SSP for
that design, taper, length, and tip size.
The number of file uses did not effect this or times run
through the autoclave. This SSP logically seemed to be 1mm to
2mm from where the shaft meets the handle for maximum ease of
Having Ni-Ti rotary files modified to optimum values
allowed clinical trials to begin in January of 2004. It was
pleasantly surprising that the majority of Ni-Ti commercially
available rotary files are suitable for modification. Without
as much fear of file separation, a crown down technique was
no longer "absolutely set in stone".
The optimum values determined had to be rigidly adhered to
however or file separation would occur as previously. By
using 25mm length files as much as practical, separated file
segments were easily removed with cotton pliers, hemostats,
needle holders, etc.
In a few instances, "serious wrestling" with
needle holders for 10 to 30 seconds was necessary to remove
the file segment. Dislodging motions used were
"anything but clockwise or apically".
All file segments were recovered from the canal space
and were normal in appearance. They had not "locked
in" to the canal spaces with forces requiring referral
for removal of the file segment.
By working in a small group of practices the author had a
chance to test the validity of the engineering controls built
into the Ni-Ti rotary files. Although not practical for all
current rotary files, this annular groove modification at a
SSP was successful enough to warrant clinical usage to
create more "user-friendly" files. With time this
safety upgrade should become the "standard of care"
as much as rubber dam usage.
By Duane E Cox, D.M.D.