Morita Tri Auto ZX2 User manual

Thinking ahead. Focused on life.
Multipurpose Dental Treatment Motor
Tri Auto ZX2 Operation Instructions

2Operation 2018-04-06
Thank you for purchasing the Tri Auto ZX2.
For optimum safety and performance, read this manual thoroughly before using the instrument and pay close
attention to warnings and notes.
Keep this manual in a handy place for quick and easy reference.
■Registered Trademarks and Brand Names
The names of companies, products, services etc. used in this manual are either registered trademarks or brand names.

3
Before Usep.12
Canal Treatment p.16
Maintenancep.28
Glide path can be made with
the motor.
The motor reproduces the subtle
and delicate finger movements of an
experienced dentist.
Penetration can be performed effi-
ciently with a thin Ni-Ti file or a #15
stainless steel file.
(OGP Function p.39)
Canal shaping can be made
safely and efficiently without
distorting the original shape.
The file alternates between forward
and reverse rotation delicately in
response to the load applied to it.
The makes for safe and efficient
treatment by reducing jamming,
breakage, ledge formation, and over
instrumentation.
(OTR Function p.39 )
Operation 2018-04-06
Overview and Features
Canal Shapes Modes
Memories
Normal Canals
Canals with normal shapes.
This is for most canals.
Turn Power On
Memory: m2
Mode: CW
Memory: m2
Mode: CW
Memory: m1
Mode: EMR
Memory: m1
Mode: EMR
Memory: m3
Mode: OGP
Memory:
m5 or m6
Mode: OGP
Memory: m4
Mode: OTR
Memory: m7
Mode: OTR
For Canal Measurement
and Linkage
Complex Canals
Extremely curved canals, ledged
canals, blocked canals, etc.
Canal Measurement
Measure the canal to
determine the working
length.
2
Upper Part Shaping
Enlarge the upper part
of the canal to make
treatment easier
1
p.18 p.18
p.20 2p.22 2
Press the Main switch.
Turn Power Off
Hold Down
1
2
Hold the Select switch and then
press the Main switch.
If using this instrument for the first time,
refer to “Canal Shaping (for normal canals)”.
( p.20 )
Almost all canals can be treated with the
default settings of the memories from m1
to m4. (p.16 )
There are 8 memories with different combi-
nations of motor operation, speed etc. that
can be used at different stages of the treat-
ment. Memory settings can be customized.
( p.33 )
The Tri Auto ZX2 has 5 different operating
modes which can be used for depending on
your intended use. (p.10 )
Linkage to Canal Measurement
Function
If the contrary electrode is applied
to the patient, the instrument can
be linked to the canal measurement
function while it is being used.
Tooth Icons
Glide Path
Use a thin file to
make the glide path
needed for shaping
3p.21 4p.23 45
Canal Shaping
4p.21 5p.23 6
Change file sizes as
you shape the canal.
Canal shaping can be safely
made by linking to the canal
measurement function.
Rotation is controlled automatically
at a point specified inside the canal.
This ensures safety by preventing
over instrumentation of the apical
foramen.
●OAS (Optimum Apical Stop)
File reverses slightly and then stops.
●Auto Apical Reverse
File automatically reverses rotation.
●Auto Apical Stop
File stops automatically.
(Apical Action p.36 )

4Operation 2018-04-06
Overview and Features ..................................................................................................................... 3
Prevent Accidents .............................................................................................................................. 6
Parts Identification and Display Screens ......................................................................................... 8
Parts Identification......................................................................................................................................................... 8
Display Screens for 5 Operation Modes and Standby..................................................................................................10
Display during Operation ..............................................................................................................................................11
Usage................................................................................................................................................ 12
1. Operation, Transport and Storage Environments ........................................................................................12
2. Before Use.................................................................................................................................................12
Assembling Components .............................................................................................................................................12
Connect Contra Angle...............................................................................................................................................12
Put on HP Protective Sleeve.....................................................................................................................................12
Connect Probe Cord .................................................................................................................................................13
Install File..................................................................................................................................................................13
Operation Check...........................................................................................................................................................14
Check Motor .............................................................................................................................................................14
Check Canal Measurement Function........................................................................................................................14
Check with Tester .....................................................................................................................................................15
Calibration.................................................................................................................................................................15
3. Operation ...................................................................................................................................................16
Default Settings............................................................................................................................................................16
Canal Measurement .....................................................................................................................................................18
Canal Shaping (for normal canals) ............................................................................................................................... 20
Canal Shaping (for complex canals) ............................................................................................................................. 22
EMR (Electric Measurement of Root canal length) ..................................................................................................... 24
4. After Use....................................................................................................................................................25
Turn Power Off......................................................................................................................................................... 25
Take Out the File...................................................................................................................................................... 25
Remove HP Protective Sleeve ................................................................................................................................. 25
Battery Charging ...................................................................................................................................................... 26
5. Maintenance ..............................................................................................................................................28
How to Make Various Settings........................................................................................................ 33
Rotation Controls......................................................................................................................................................... 33
Default Memory Settings ........................................................................................................................................ 33
Set Operation Mode ................................................................................................................................................ 34
Operation Mode................................................................................................................................................... 34
Set Speed and Torque.............................................................................................................................................. 35
Speed (r/min)........................................................................................................................................................ 35
Table of Contents

5
Operation 2018-04-06
Torque (N･cm)...................................................................................................................................................... 35
Settings for Canal Measurement Linkage ............................................................................................................... 36
Apical Action ........................................................................................................................................................ 36
Auto Start............................................................................................................................................................. 37
Auto Stop ............................................................................................................................................................. 37
Flash Bar Position................................................................................................................................................. 37
Set Other Functions................................................................................................................................................. 38
Apical Slow Down ................................................................................................................................................ 38
Torque Slow Down............................................................................................................................................... 38
Apical Torque Down.............................................................................................................................................. 39
Rotation Angle ..................................................................................................................................................... 39
OGP Mode ....................................................................................................................................................... 39
OTR Mode ........................................................................................................................................................ 39
Beeper Volume..................................................................................................................................................... 39
Other Handpiece Functions......................................................................................................................................... 40
Default Handpiece Settings ..................................................................................................................................... 40
Set Handpiece Functions......................................................................................................................................... 40
Auto Power Off Time............................................................................................................................................ 40
Auto Return to Standby Display ........................................................................................................................... 40
Dominant Hand .................................................................................................................................................... 40
Startup Memory Number..................................................................................................................................... 40
Reset Memories to Original Default Settings.............................................................................................................. 41
Replacement Parts ........................................................................................................................... 42
External File Electrode..................................................................................................................... 44
Maintenance and Inspection........................................................................................................... 46
Troubleshooting............................................................................................................................... 47
1. Troubleshooting........................................................................................................................................... 47
2. Abnormal Stop ...........................................................................................................................................49
3. Error Numbers ...........................................................................................................................................49
Technical Specifications .................................................................................................................. 50
Symbols....................................................................................................................................................................... 51
Service Contacts .............................................................................................................................. 52
Consumable and Replacement Parts .......................................................................................................................... 52
Appendix-Electromagnetic Declaration ......................................................................................... 53
Safety and Accident Prevention for the Operation of Electrical Medical Devices...................... 55

6
• Do not use the wireless transmission devices listed below in the examination area:
（1.（Cell phone terminals.
（2.（Wireless transmitting devices such as ham radios, walkie-talkies, and transceivers.
（3.（Personal Handy-phone System (PHS)
（4.（Routers for intra-building paging systems, wireless LAN, cordless analogue telephones, and other electric wireless devices.
• This instrument could be adversely affect by the electromagnetic radiation produced by electric scalpels, illumination devic-
es etc. that are being used nearby.
• Do not perform maintenance while using the instrument for treatment.
Operation 2018-04-06
These caution remarks are especially critical for safe operation and use.
Prevent Accidents
Attention Dealers
Do not fail to give clear instructions concerning the various ways to use this instrument as described in this accompanying
Operation Instructions.
After instructing the customer in the operation of the instrument, have him fill out and sign the warranty. Then fill in your
own section of the warranty and give the customer his copy. Do not fail to send the manufacturer’s copy to J. MORITA MFG.
CORP.
Prevent Accidents
Most operation and maintenance problems result from insufficient attention being paid to basic safety precautions and not
being able to foresee the possibilities of accidents.
Problems and accidents are best avoided by foreseeing the possibility of danger and operating the instrument in accordance
with the manufacturer’s recommendations.
First, thoroughly read all precautions and instructions pertaining to safety and accident prevention; then, operate the instru-
ment with the utmost caution to prevent either damaging the instrument itself or causing bodily injury.
Do not fail to receive clear instructions concerning the various ways to use this instrument as described in this accompanying
Operation Instructions.
Fill out and sign the warranty and give the dealer from whom you purchased the instrument a copy.
Attention Customers
The following symbols and expressions indicate the degree of danger and harm that could result from ignoring the instruc-
tions they accompany:
This informs the user of important points concerning operation or the risk of instrument damage.
The user (i.e., healthcare facility, clinic, hospital etc.) is responsible for the management, maintenance and use of medical
device.
This instrument must only be used by dentists and other legally licensed professionals.
Do not use this instrument for anything other than its specified dental treatment purpose.
This alerts the user of possibility of extremely serious injury or complete destruction of the
instrument as well as other property damage including the possibility of fire.
This alerts the user of possibility of minor or moderate injury or damage to the instrument.
• No modification of this instrument is allowed.
• Do not use this instrument on patients who have implanted pacemakers or defibrillators.
Caution : Federal law restricts this device to sale by or on the order of a dentist. (for U.S.A.)

7
Operation 2018-04-06
If an accident occurs, the Tri Auto ZX2 must not be used until repairs have been completed by a qualified and trained techni-
cian authorized by the manufacturer.
Intended Operator Profile
a) Qualification : Legally qualified person such as dentists for endodontic device operation (it may differs among countries).
b) Education and Knowledge : It is assumed that the understands the risks of root canal measuring and treatment. It is also
assumed the user is thoroughly familiar with root canal measuring and treatment including the prevention of cross con-
tamination.
c) Language Understanding : English (Intended for professional use as described above)
d) Experience : Experienced person with operating endodontic device.
No special training is required except in cases where this is required by legal regulations of the relevant country or region.
Age : Childhood to Elderly
Weight : Not applicable.
Nationality : Not applicable.
Sex : Not applicable.
Health : It is not intended for use on patients wearing pacemakers or ICDs.
Condition : Awake state and mentally qualified person. ( person who can stay still during treatment. )
In Case of Accident
User Qualifications
Patient Population
Disclaimer
J. MORITA MFG. CORP. will not be responsible for accidents, instrument damage, or bodily injury resulting from:
（1.（Repairs made by personnel not authorized by J. MORITA MFG. CORP.
（2.（Any changes, modifications, or alterations of its products.
（3.（The use of products or equipment made by other manufacturers, except for those procured by J. MORITA MFG. CORP.
（4.（Maintenance or repairs using parts or components other than those specified by J. MORITA MFG. CORP. and other than
in their original condition.
（5.（Operating the equipment in ways other than the operating procedures described in this manual or resulting from the safe-
ty precautions and warnings in this manual not being observed.
（6.（Workplace conditions and environment or installation conditions which do not conform to those stated in this manual such
as improper electrical power supply.
（7.（Fires, earthquakes, floods, lightning, natural disasters, or acts of God.
The useful life of the Tri Auto ZX2 is 6 years (based on self-certification) from the date of shipment provided it is regularly and
properly inspected and maintained.
J. MORITA MFG. CORP. will supply replacement parts and be able to repair the product for a period of 10 years after the
manufacture of the product has been discontinued. For the duration of this period, we will supply replacement parts and be
able to repair the product.
• This device is not recommended for use in children under 12 years of age.

8Operation 2018-04-06
Parts Identification and Display Screens
⹅Handpiece
⹅Battery Charger
Battery Charger
AC Adapter
Power Plug * Power Plug
p.27 “Using and handling
the power plug for the AC
Adapter.”
Charge LED
(orange)
Ready LED
(green)
LCD Display
Select Switch ( )
Main Switch
Motor Handpiece
Contra Angle
File Holder
Probe Cord
Contrary Electrode
Set Switches ( )
Parts Identification

9
Motor Handpiece (1) Contra Angle (1) Built-in Electrode
* Pre-installed in Contra Angle
Guide Bar (1)
* Use the guide bar when
replacing the built-in electrode
or external file electrode.
p.43 "Replacing Built-in Electrode"
p.44 "External File Electrode"
Battery Charger (1) Battery
* Pre-installed in Motor Hand-
piece
AC Adapter (1) Power Plugs
(one each of 4 types)
Probe Cord (1) File Holder (1) Contrary Electrodes (3) Tester (1)
HP Protective Sleeve
Type A (30)
* Replace for each patient.
Never reuse.
Spray Nozzle (1)
* Keep this nozzle and use it
again when replacing the
spray can.
Handpiece Holder External File Electrode
(with cap)
Long File Holder
LS SPRAY (1) or MORITA MULTI SPRAY(1)
(sold separately)
Operation 2018-04-06
⹅Components and Accessories
⹅Options (sold separately)
Using the long file holder

10 Operation 2018-04-06
Display Screens for 5 Operation Modes and Standby
EMR Mode
CW Mode
OGP Mode
OTR Mode
CCW Mode
This mode is for canal measurement.
*The motor does not run in this mode.
*When this mode is being used, a double-beep
sounds continuously.
The motor rotates forward 360º.
Torque reverse and other functions can be used.
The OGP (Optimum Glide Path) function
(p.39 )is used for canal negotiation and mak-
ing the glide path.
The OTR (Optimum Torque Reverse) function
(p.39)is used for canal shaping.
The motor rotates counterclockwise direction only.
This mode is used to inject calcium hydroxide and
other medicant.
Memory No.
Residual Battery Power
Operation Mode
Flash Bar Position
Memory No.
Residual Battery Power
Operation Mode
Speed Setting
Torque Limit Setting
Memory No.
Residual Battery Power
Operation Mode
Speed Setting
Rotation Angle
Memory No.
Residual Battery Power
Operation Mode
Speed Setting
Rotation Angle
Memory No.
Residual Battery Power
Operation Mode
Speed Setting
Torque Limit Setting

11
Operation 2018-04-06
Display during Operation
⹅Torque Display
Torque Value
0 – 2.0 N･cm
Location Inside Canal
0 – 13 bars
Location Inside Canal
14 – 18 bars
Location Inside Canal
19 – 20 bars
Torque Value
2.2 – 4.0 N･cm
Torque Value
4.2 – 5.0 N･cm
0 – 2.0
2.2 – 4.0
4.2 – 5.0
Meter shows the torque load on the file. The color of the display changes depending on the torque load as shown below.
⹅Canal Measurement Display
There is slow beep-
ing sound between
bars 10 – 13.
A sustained beep
sounds when the file
tip reaches the flash
bar point.
A sustained beep
sounds when the file
tip reaches the flash
bar point.
A sustained beep
sounds if the file tip
goes this far.
There is fast beeping
sound between bars
14 – 18.
Alarm Sound:
slow beep
Alarm Sound:
fast beep
Alarm Sound:
continuous
beep
Alarm Sound:
continuous
beep
Alarm Sound:
continuous
beep
Bars in meter show the location of the file tip. The color of the display changes depending on location of the file inside
the canal as shown below.
*The meter numbers 1, 2, and 3 do not represent the actual length from the apical.
These numbers are used to estimate the canal’s working length.
0 – 13
19 – 20
(This appears when the motor is running.)
Flash Bar Position
( p.37 )
Canal
Length Indi-
cator Bar
Torque Limit or Trigger Torque
( p.35 )
There is some discrepancy in the torque value depending on the condition of the motor and contra angle and this value is used only as a reference as follows :
There could be some discrepancy in the torque value caused by decreased efficiency of contra angle from poor maintenance or deterioration of motor.
The displayed torque should be used as a reference value.
When discrepancy between the displayed and actual torque was suspected, perform the maintenance of the contra angle, and ask for repair if failure
including noise or vibration was existed. Calibration shown in P15 is also recommended.
14 – 18
The meter’s 0.5 read-
ing ( ) indicates that
the file tip is located
very near the physio-
logical apical foramen.
(This appears when a file is inside the canal and the contrary electrode is con-
tacting the patient.)

12 Operation 2018-04-06
Usage
*Do not expose the Tri Auto ZX2 to direct sunlight for an extended period of time.
*If the instrument has not been used for some time, make sure it works properly before using it again.
*Always remove the battery prior to storing or shipping the instrument. p.42
1. Operation,Transport and Storage Environments
2. Before Use
Put the protective sleeve on so that its long side is on the
LCD display side.
Assembling Components
• Push the contra angle all the way onto the motor handpiece and then
give it a light tug to make sure it is securely attached.
• The contra angle does not rotate freely. Do not try to rotate it past its
stopper.
• Make sure the connection ends of the motor handpiece and the contra
angle are not damaged. If these are damaged, the load on the contra
angle could cause the motor to reverse rotation, and this might result in
an injury to the oral cavity.
If you hold the contra angle when you put the sleeve on, the contra angle
might come off. Always put in on by pushing on the battery terminal end
of the motor.
Make sure the sleeve is not torn.
290°
ProjectionNotch
Long side of the
sleeve
Battery Terminals
LCD display side
Line up the notch inside the contra angle with the projec-
tion inside the motor and slide it in until it clicks securely
into place.
Check the following before using the instrument.
• Have autoclavable components been sterilized? p.28 “Autoclavable Components”
• Is the battery sufficiently charged? p.26 “Battery Charging”
The contra angle rotates 290° so that the LCD display can
always be viewed easily.
Put on HP Protective Sleeve
Connect Contra Angle
• To prevent cross contamination between patients, use a new sleeve for
each patient. (Never reuse.)
Operating Temperature: +10°C to +35°C (+50°F to +95°F)
Humidity: 30% to 80% (without condensation)
Atmospheric Pressure: 70 kPa to 106 kPa
Transport and Storage Temperature: -10 °C to +45°C (+14°F to +113°F)
Humidity: 10% to 85% (without condensation)
Atmospheric pressure: 70 kPa to 106 kPa

13
3
1
2
Operation 2018-04-06
Connect the probe cord to the motor handpiece. Line up
the probe jack with the notch for its mate on the back of
the motor and push it all the way in.
Connect the file holder plug into the probe connector (gray)
on the probe cord. Connect the contrary electrode to the
probe connector (white).
• Do not bang or bump the plugs when they are inserted.
• Make sure the plug is all the way in. Otherwise canal measurements
cannot be made.
• Do not wind the probe cord around the instrument.
• Match colors to connect the file holder and contrary electrode. Accurate
measurement cannot be made if they are reversed.
Hold down the push button on the contra angle and insert
the file. Turn the file back and forth until it is lined up with
interior latch groove and slips into place. Release the but-
ton to lock the file into the contra angle.
• Be careful when inserting and removing files to avoid injury to fingers.
• Inserting and removing files without holding the push button may dam-
age the chuck.
• Take care not to touch the Main switch when putting files in. This will
cause the file to rotate.
• If there is no electrical conductivity between the file and its shank,
replace the cap with the one that has an external file electrode.
p.44 “External File Electrode”
• Do not use files with shanks larger than the ISO standard. These cannot
be properly installed. (ISO standard: Ø2.334 – 2.350 mm)
Push Button
• Files are expendable, and they eventually wear out. Replace them be-
fore they break.
• Never use stretched, deformed or damaged files.
• Make sure the file is all the way in. Give the file a light tug to confirm it
is securely held in place. If the file is not securely placed, it could come
out and injure the patient.
• Make sure the screw is tight enough. Other-
wise, it might come out and be swallowed. Also,
canal measurements might not be accurate.
Screw
* Use only Ni-Ti or properly designed stainless steel files.
* This is not required if the canal measurement function will not
be used.
Install File
Connect Probe Cord
Probe Connector (white)
Probe Connector (gray)
File Holder
Contrary Electrode

14 Operation 2018-04-06
Touch the contrary electrode with the clip on the end of
the file holder and check that all the indicator bars on the
meter in the LCD display light up.
Operation Check
Press the Main switch to turn on the instrument.
The stand by display (m1) will appear.
Press the Right-Set switch ( ) to select “m2”*.
Press the Main switch and make sure the motor runs
smoothly.
⹅Check Motor
If there are abnormal vibrations or noises, stop using the instrument im-
mediately and contact your local dealer or J. MORITA OFFICE.
Check the following before turning on the instrument.
• Make sure the contra angle and the motor handpiece are
securely connected.
• Make sure the file is securely installed in the contra angle.
Check the following before turning on the instrument.
• Make sure the file holder and the contrary electrode are prop-
erly connected to the probe connector.
• Make sure the probe cord is properly plugged into its jack on
the motor handpiece.
* This is the default setting.
If m2 is set for EMR mode, select a memory that is not EMR
mode.
The torque meter appears when the motor is running.
Press the Main switch to turn on the instrument.
The stand by display (m1) will appear.
• Check the instrument’s function before use with each patient. If all
the indicator bars do not light up, an accurate measurement cannot be
made. In this case, stop using the instrument immediately and have it
repaired.
Examples using default settings
⹅Check Canal Measurement Function
File Holder Clip
Contrary Electrode
File Holder

15
Operation 2018-04-06
Touch the contrary electrode with the file in the contra
angle and check that all the bars on the meter in the display
light up.
Connect the tester to the probe cord jack on the back of
the motor handpiece.
Check that the canal length indicator bars light up to with-
in two bars of bar number 1.*1
⹅Check withTester
⹅Calibration
Tester
Within this
range.
* The canal length indicator bars may flicker up or down momen-
tarily when the tester is plugged in.
Wait for about 1 second for the indicator bar to stabilize and
then check it.
* Calibration is automatically performed from 100 to 1,000 r/min.
*1 If the meter lights up to three bars more or less than bar
number 1, the instrument cannot make an accurate mea-
surement. In this case, stop using the instrument immedi-
ately and contact your local dealer or J. MORITA OFFICE.
Check the instrument’s measurement accuracy with the tester at
least once a week.
Calibrate the instrument at the following times:
• Right after purchase.
• Whenever the contra angle has been replaced.
• When using a contra angle other than the one that has been
calibrated.
• Whenever, in OTR mode, the instrument always alternates be-
tween forward and reverse rotation and never rotates forward
continuously.
Press the Main switch to turn on the instrument.
The stand by display (m1) will appear.
With the instrument turned off, hold down the Left-Set
switch ( ) and then press the Main switch. The calibra-
tion display will appear.
Press the Right-Set switch ( ). Calibration will be per-
formed. After calibration, the instrument will automatically
return to the Standby display.
Perform calibration with the contra head attached. If calibration is per-
formed with a file inserted, be careful not to injure your fingers.
Hold down

16 Operation 2018-04-06
Almost all canals can be treated with the default settings of the memories from m1 to m4. However, settings can be changed
to suit various stages of treatment.
We recommend using the default settings until the user has gotten used to how the instrument works.
*Refer to page ( p.33 “How to Make Various Settings” ), for how to make and change settings.
*After changing settings, refer to page p.41 “Reset Memories to Original Default Settings”, for how to restore the
original settings.
3. Operation
Select the memory appropriate to the treatment to be performed.
The main uses, operation modes, and apical actions for the default settings of each mode are listed below.
The following explanation is base on the default settings.
• Since the following is based on the default settings, use changed settings for your own treatment procedures.
• Always check the settings after changing the memory number.
Default Settings
Memory Main Uses with Default Settings
Operation
Mode
p.34
Apical Action
p.36
m1 Canal measurement EMR —
m2 Shape the upper part of canal. CW
(forward) OAS
m3 Negotiation and making a glide path for a normal canal OGP OAS
m4 Canal shaping for a normal canal OTR OAS
m5 Negotiation and making a glide path for a complex canal OGP OAS
m6 Making a glide path for a complex canal OGP OAS
m7 Canal shaping for a complex canal OTR OAS
m8 Injection solutions such as calcium hydroxide, etc. CCW
(reverse) Off

17
Operation 2018-04-06
• Before use, run the Tri Auto ZX2 outside the oral cavity to make sure it is operating normally.
• Depending on the condition of the tooth, the type of case, and the condition of the instrument, it may not be possible to shape and measure a canal prop-
erly. Make sure to take an X-ray to check the results.
• In general Ni-Ti files can sometimes wear out rather quickly depending on the shape and the degree of curvature of the root canal. Stop using the instru-
ment immediately if tactile feedback indicates the instrument is not working properly.
• Since files can easily break due to metal fatigue and excessive load, replace them frequently. Since stainless steel files are especially easily broken, it is
best to not reuse them and replace them with new ones instead.
• Electric noise or a malfunction could make it impossible to control the motor properly. Do not depend entirely on the instrument controlling itself; always
watch the display, listen to the sound and be aware of tactile feedback.
• Applying excessive force at canal shaping could cause the file to jam inside the canal or break the file.
• Do not apply excessive force. Even when using the torque reverse function, files may break depending on the torque setting.
• When changing files, always examine for stretching and other deformities or damage before using them. Deformed files tend
to break.
• If the contra angle’s file release button is pressed against the teeth opposite the one being treated, the file could come out
and injure the patient.
• Never press the push button while the motor is running. This could cause it to heat up and burn the patient. Also the file might
come out and injure the patient.
• Always use a rubber dam to prevent accidental swallowing of files etc.
Push Button
• Stop using the instrument immediately if tactile feedback indicates the instrument is not working properly.
• Files break more easily at high speeds; always follow the file manufacturer’s recommendations. Also always check the rotation speed before using the
instrument.
• Use only Ni-Ti or properly designed stainless steel files.
• Ni-Ti files break rather easily. Pay close attention to the following points:
• Never use excessive force to insert the file.
• All foreign matter, such as bits of cotton, should be removed from the root canal before using the file.
• Never use excessive force to advance the file down the root canal. Ni-Ti files break easily if too much load or force is applied.
• Take great care when working on extremely curved canals. These can break the file easily.
• Try not to trigger the auto torque reverse function as much as possible when advancing the file down the root canal.
• Use files in the order of their sizes without skipping any sizes. A sudden change to a larger file can lead to file breakage.
• If you encounter resistance or the auto torque reverse is triggered, take back the file up 3 or 4 mm and carefully advance it down the root canal again.
Or replace the file with a smaller size. Never use excessive force to insert the file.
• Do not force the file down the root canal or press it against the root canal wall as it could break the file.
• Do not use the same file continuously in one position for too long as it may lead to creating “steps” etc.
• Always remove the file after use.
• Use only files that are designed for clockwise filing. Use files very carefully and follow all the recommendations of the manufacturer.

18 Operation 2018-04-06
Push the button on the file holder with your thumb in
the direction shown by the arrow in the illustration. Clip
the holder onto the metal upper part of the file and then
release the button.
Hook the contrary electrode in the corner of the patient's
mouth.
Canal Measurement
Press the Main switch to turn on the instrument.
The stand by display (m1) will appear.
Turn Power On
Apply Contrary Electrode
Clip the File
Measure a canal and determine its working length.
• Never use an electric scalpel when the contrary electrode is hooked in
the patient’s mouth. These devices emit electrical noise that could inter-
fere with accurate measurement or cause the instrument to malfunc-
tion.
• Make sure that the contrary electrode, file holder, and their connectors,
do not come into contact with an electric power source such as a power
outlet. This will result in an electric shock.
• Accurate measurement is not always possible, especially in cases of
abnormal or unusual root canal morphology. Make sure to take an X-ray
to check the results.
• If connections are not securely plugged in the instrument may not make
an accurate measurement. If the meter does not change as the file goes
down the canal, stop using the instrument immediately and make sure
all the connectors are securely inserted.
• The contrary electrode could cause an adverse reaction if the patient has
an allergy to metals. Ask the patient about this before using the contrary
electrode.
• Take care that medicinal solutions such as formalin cresol or sodium hy-
pochlorite do not get on the contrary electrode or the file holder. These
could cause an adverse reaction such as inflammation.
• When clipping the file holder onto the metal part of a file or reamer, clip
the file holder onto the metal shaft near the handle. Do not clip it onto
the cutting part or transition part of the file or reamer. This will cause the
file holder to wear out very quickly.
To measure a root canal, use a file or reamer with a plastic handle. If you
do not wear gloves, do not use a file with a metal handle. Current leakage
from a metal handle to your fingers will prevent an accurate measure-
ment.
Do not use damaged or worn file holders, otherwise accurate measure-
ments cannot be made.
EMR mode is now selected.
Examples using default settings
Corner of mouth
Contrary Electrode
File Holder
Push Button
Cutting and transition parts

19
○
×
Operation 2018-04-06
• Do not clip them as shown in figure 2. This will prevent accurate mea-
surement and will damage the tip of the file holder.
Canal Measurement (m1)
Clip the file or reamer as shown in figure 1.
Advance the file down the canal to the 0.5 meter reading
point ( ). Then position a rubber stopper on the surface
of the tooth or other suitable point to serve as a measure-
ment reference.
●0.5 Meter Reading
The meter’s 0.5 reading indicates that the file tip is located very
near the physiological apical foramen. Use this to determine
the working length depending on the individual case. The exact
working length depends on the shape and condition of the canal,
and a clinical judgment must be made by the dentist.
Canal Length Indicator Bar
0.5 Meter Reading
Rubber Stopper
Do not touch the gums with the file. The meter will light up all the way.
If the canal is too dry, the meter may not move until the file is near the
apex. If the meter does not move, stop the measurement. Moisten the
canal with oxydol (hydrogen peroxide) or saline, and then try measuring
again.
Occasionally the meter will make a sudden and large movement as soon
as the file is inserted into the root canal, but it will return to normal as the
file is advanced down towards the apex.
After measuring the root canal, make sure to take an X-ray to check the
measurement results.
• In some cases such as a blocked root canal, a measurement cannot be
made.
p.24 “EMR (Electric Measurement of Root canal length)”
• Accurate measurement is not always possible, especially in cases of
abnormal or unusual root canal morphology. Make sure to take an X-ray
to check the results.
• Stop using the instrument immediately if it does not seem to be work-
ing properly.
• If the canal length indicator bar does not appear even when the file is
inserted, the instrument may be malfunctioning and must not be used.
Turn Power Off
While the standby display is on, you can turn off the
instrument by holding down the Select switch ( ) and
pressing the Main switch.
* The numerals 1, 2, and 3 do not represent length in millimeters
from the apical. These numbers are used to estimate the canal’s
working length.
Hold down
Figure 1 Figure 2
OK NG
●Auto Power Off Function p.40 “Auto Power OffTime”
If no switches are pressed for 10 minutes, the instrument will
automatically turn off (default setting).

20 Operation 2018-04-06
Press the Left-Set switch ( ) to select “m1” ( EMR
mode ) and measure the canal.
p.18 “Canal Measurement”
• Never use an electric scalpel when the contrary electrode is hooked in
the patient’s mouth. These devices emit electrical noise that could cause
the motor to run or cause the device to malfunction.
• Make sure that the contrary electrode, file holder, handpiece file elec-
trode etc., do not come into contact with an electric power source such
as a power outlet. This will result in an electric shock.
Press the Right-Set switch ( ) to select “m2” ( CW
mode ).
Install a suitable file and shape the upper part of the canal.
Press the Main switch to start and stop the motor.
Canal Shaping (for normal canals)
Press the Main switch to turn on the instrument.
The stand by display (m1) will appear.
The torque display appears when the motor is running.
p.11 “Torque Display”
If the contrary electrode is applied to the patient, the instrument
can be linked to the canal measurement function while it is being
used.
p.36 “Settings for Canal Measurement Linkage”
* The meter numbers 1, 2, and 3 do not represent the actual
length from the apical. These numbers are used to estimate the
canal’s working length.
Turn Power On
Shape Upper Part of Canal (m2)
Canal Measurement (m1)
This can usually be done using memories 1 to 4.
Use these four memories to shape canals until you get used to using the Tri Auto ZX2.
Corner of mouth
Contrary Electrode
Examples using default settings