Time for Improvement

1
Time for Improvement
The current LightSpeed (LS) design has worked
well for over 10 years but improvements that can
be made and perceptions can be changed. We have
spent the last 3 years searching for design and
manufacturing solutions to make the new
instrument better than the current design.
The new version is called LightSpeed eXtra safe
(LSX) to highlight the observations made by our
evaluators. They noted its resistance to fracture
virtually eliminating their anxiety of using
rotary instruments.
2
Perceptions to Address

• LightSpeed has too many instruments

• LightSpeed instruments are fragile and break
  easily

• LightSpeed technique takes too long and is
  cumbersome

3
Design Objectives

• Reduce the number of instruments
• Make a stronger instrument
• Make separation a non-issue
• Simplify the technique and reduce treatment time

while maintaining the excellent results of the
original version of LightSpeed
4
LSX Solutions

• Safe-Failure Mode
• Predictable instrument separation when
  overstressed
• Reduces incidence of non-retrievable fragment
• Reduces stress on dentist

• Improved Technique
• Simplifies technique and reduces number of
  instruments
• Saves time

5
Solutions

• Blade designchanged from U-Style to Spade Blade
• Eliminates flutes that fill with debris and lose
  cutting efficiency
• Reduced blade cutting surface that increases
  cutting efficiency and eliminates need for
  half-sizes

• Manufacturing Process--no grinding
• Eliminates surface defects that cause premature
  failure
• Eliminates LS weak point (behind the cutting
  blade)

6
Unique Manufacturing Method
LSX is the world's first NiTi rotary instrument
that does not require grinding  
It is well known that grinding produces surface
imperfections that result in unexpected
instrument separation
7
Introducing LSX25 mm Version
Handle ISO Color and Size Identifier
Shank -- Depth rings _at_ 19,
20, 22, 24 mm
Shaft / Shank Junction _at_ 18 mm
Shaft Flexible and Noncutting
Cutting Blade Spade Type
Available in 21, 25, 31 and 50 mm lengths
8
Side View of LSX Blade
Very short cutting area for great cutting
efficiency
Dont judge the book by its cover Even though
it looks different, you will be amazed at how
well it works!
Noncutting Tip
9
LSX
Weakest point here
No grinding marks on shaft
No weak point here
10
Examples of Retrievable Safe-Failures
Shaft Pulls Loose from the Handle
Shaft Twist-Up
Excessive forces cause instrument to pull loose
from the handle or twist-up. This makes
retrieval from canal easier.
11
Front View of LSX Blade
Very Small Cutting Surfaces
Small Radial Lands
12
Front View of LSX Blade
Plenty of space for cut debris Has no flutes that
can fill with debris. Therefore it maintains
excellent cutting efficiency
13
Front View of LSX Blade
Space for bypassing broken instrument
14
Front View of LSX Blade
Use in Clockwise or Counterclockwise Rotation
15
Recommendations

• Handpiece Speed faster is better. Speeds below
  2000 rpm are not recommended. 2500 to 3000 rpm
  works well.
• Handpiece Torque higher torque is better.
  Helps instrument cut through dentin more easily.
• Change hand motion from pecking to
• 1) advance to resistance
• 2) pause briefly
• 3) slow gentle push
• MAR is now called FAS (Final Apical Size) and is
  determined when an instrument meets resistance 5
  mm or more from WL (and a firm push is required
  to reach WL).

16
Summary
Simplified technique
Faster technique, number of instruments cut
nearly by half
ISO size markings for easier identification
Reduced anxiety of leaving broken fragment in
canal