DENTSPLY Midwest E Electric Handpiece System Manual

Doc. No. 87514-0914
Directions for Use
CAUTION: US Federal law restricts this device to sale by or on the order of a licensed dental professional

Table of Contents
1Introduction .....................................................................3
2Important Information......................................................4
Indications for Use .............................................................4
Contraindications...............................................................4
Warnings............................................................................4
Precautions........................................................................6
Adverse Reactions.............................................................6
Applied Symbols................................................................7
3Product Overview............................................................8
Overview of the Unit...........................................................8
Back Panel.........................................................................9
4Installation and Preparation for Use..............................10
Location ...........................................................................10
Installation........................................................................10
System Icons ...................................................................13
5Set Up Mode.................................................................15
Set Up Mode Operations .................................................15
Calibration........................................................................16
6General Operation.........................................................19
General Operation ...........................................................19
Operational Mode Options...............................................20
7Preparation Mode..........................................................21
Preparation Mode Operations ......................................... 21
8Endodontic Mode.......................................................... 23
Endodontic Mode Operations.......................................... 23
9Cleaning and Maintenance........................................... 26
Cleaning.......................................................................... 26
Maintenance.................................................................... 26
10 Troubleshooting............................................................ 27
11 Information on Electromagnetic Compatibility............... 28
12 Specifications ............................................................... 30
Control Unit ..................................................................... 30
Power Supply.................................................................. 30
Requirements to Control Unit.......................................... 30
Recommended Input Settings ......................................... 31
Operating Conditions of Control Unit and Power Supply. 31
Type Label....................................................................... 31
13 Spare Parts................................................................... 32
14 Warranty....................................................................... 33
Maintenance & Repair –Within USA............................... 33
Maintenance & Repair –Within Canada.......................... 33
All trademarks referred to are the property of their respective owners.
Manufactured for:
DENTSPLY Professional
A division of DENTSPLY International
901 West Oakton Street
Des Plaines, IL 60018-1843
USA
www.dentsply.com

1 Introduction
Page 3
1 Introduction
The Midwest®E Electric Handpiece System is a dental handpiece system with various attachments, intended for
cutting, shaping, filing, drilling, cleaning and polishing procedures in both general and endodontic dentistry.
System Contents
The Midwest®E Electric Handpiece System is comprised of the following components:
Midwest®E Electric Handpiece System
Midwest®E Motor
Power Cord
Mounting Attachment
Directions for Use

2 Important Information
Page 4
2 Important Information
Indications for Use
The Midwest®E Electric Handpiece System is intended for use by dental professionals in the performance
of dental restoration, prophylaxis and endodontic procedures.
Attachments are offered to complement the system used for general dentistry work. The intended use of the
respective attachment is dependent on the gear ratio. The System offers handpiece attachments for the
removal of decayed matter, cavity and crown preparations, and removal of fillings and surface finishing of
tooth and restoration surfaces. In addition, the system offers attachments for caries excavation and
endodontics.
Contraindications
None known
Warnings
WARNING: This product is intended for use by dental professionals only. Before operating the system,
carefully read and follow these intructions and save them for future reference. Observe all cautions and
warnings including:
This Medical device is only intended for dental treatment
As described in the Indications for Use, any other type of use or alteration to the product is
prohibited and can lead to personal injury or damage to the product.
Electric Dental Micromotors generate significantly more power than traditional air turbines
and air motors.
Due to this increased power and torque, poorly maintained, misused, worn, or damaged handpieces
can potentially generate friction induced heat capable of causing serious burns to patients and staff.
The following guidelines should be followed to ensure safe operation of electric handpieces:
oCarefully follow these maintenance instructions.
oUse only Midwest maintenance products.
oAlways examine the handpiece for damage before each use. Immediately stop using the
handpiece if it begins generating heat, excessive noise, or vibration.
oNEVER apply pressure to the chuck release button while the handpiece is rotating or use
the handpiece as a cheek or tongue retractor!
Only Use the AC Power Adaptor and Control Unit Supplied for this Equipment.
Using other AC Power Adaptors or Control Units may cause personal injury or damage to the
equipment.
Proper Disposal is Required.
To dispose of this device adhere to local, state, federal and/or other governing regulations.

2 Important Information
Page 5
Radio Frequency Interference
The Midwest®E Electric Handpiece System meets the electromagnetic compatibility (EMC)
requirements as specified in the International Electrotechnical Commissions (IEC) 60601-1-2:2007
standard for electromagnetic compatibility. There may be potential difficulties if the device is not kept
separate from other equipment, such as hand-held transmitters, cellular phones, and electrosurgical
equipment that may generate strong radio frequency interference (RFI). The functions of implanted
systems, such as pacemakers, can be influenced by electromagnetic fields. Inform patients of the
risks before starting treatment.
Use of damaged Edondontic files or Burs
Use of damaged Endondontic files or Burs can result in personal injury or damage to the product.
Stop using the device immediately in the event of damage, irregular running noises, excessive
vibrations, unusual generation of heat or if the drill bit is not firmly gripped.
Only Use Approved Files and Burs
Unauthorized file systems can result in personal injury or damage to the product.
oOnly use authorized Ni-Ti file systems with a consistency of >2%, suitable for rotary
systems.
oOnly use files with shafts meeting the requirements of ISO 1797-2, ISO 3630-1, and ISO
3630-2, with a shaft diameter of 0.092 to 0.093 inches.
Service Using Authorized Personnel Only
Supply of spare parts, service, and maintenance of the Midwest® E Electric Handpiece System is
restricted to DENTSPLY authorized service personnel only. Use of other servicing or non-qualified
parts is prohibited.
NOTE: Send the product every 3 years for a service check. The safety check according to IEC
62353 and the measurement check will be carried out during service check. The safety
checks in different countries can vary in compliance with country specific regulations and
requirements for medical devices. The national valid regulations are to be observed.
Endodontic Mode
Attachments for root canal treatments should only be used in Endodontic Mode to prevent personal
injury.
Always comply with the endodontic handpiece and file manufacturer’s instructions regarding
maximum speeds, torques, forward and reverse directions, and use of all instrumentation, drills,
burs, etc., used in endodontic applications.
Risk of Fire - Operation Oxygen Enriched Environment
Do not operate this product in the presence of flammable anesthetics (such as ether) in combination
with air, oxygen-enriched environments, or nitrous oxide; explosion can result. Reference IEC
60601-1.
NOTE: Nitrous Oxide alone is not a flammable anesthetic.

2 Important Information
Page 6
Handpiece Attachments
Follow and adhere all instructions described in the Handpiece Attachment Directions for Use.
Ensure Handpiece Attachments are inserted completely, such that the attachment and motor are
flush with each other. Follow the separate User Manual for attaching and using the dental
attachments. Improper handling can result in personal injury.
Inspect Power Cord and Control Unit Case
Inspect the power cord and the control unit case before use for any damages to the cord, ground
wire, or casing.
Precautions
Avoid Adhesive Labels on the Instrument Tubing
Attaching adhesive labels or tape to the intrument tubing may cause the tubing to break.
Cleaning the System
oDo not use products containing acetone chlorine or bleach as disinfecting agents.
oDo not immerse the system in solution.
Motor Operation
Note: To prevent overheating, the motor should not be operated at maximum speed and torque for
more than 30 seconds in any 9 minute interval. This duty cycle is typical of its intended use.
Adverse Reactions
None Known.

2 Important Information
Page 7
Applied Symbols
Appearing in the manual:
Appearing on the unit:
A potential hazard to
the operator/patient
Operation mode: Duty
cycle. The operation
time is 0.5 minutes with
a 9 minutes interval.
Manufacturer
Important information
for the operator. A
potential hazard that
may lead to damage to
the device.
Consult Directions For
use
MET test mark
Disposal information
see Important
Information "Disposal"
Appearing on the packaging:
Fragile
Stacking restrictions
Humidity
Keep dry
Temperature range
Quantity
Transport upright
Air pressure
Exclusion of Liability
Supply of spare parts, service and maintenance may only be carried out by authorized personnel.
DENTSPLY shall assume no liability for accidental, special or consequential damage caused by
maintenance or service of the Midwest E unit by third parties, or for use of equipment or parts manufactured
by third parties, including loss of profit, any commercial loss, economic loss or loss incurred by personal
injury.
Never remove the cover of the device and never insert objects through the holes or openings on the case.
Non-compliance may cause damage to the device and/or may endanger the user.

3 Product Overview
Page 8
3 Product Overview
Overview of the Unit
Figure 1 –Overview of the Unit
LCD Screen
Control Unit
Midwest®E Motor
Power Supply Unit
Power Supply - Main Cord
Motor Hose
Installation Bracket

3 Product Overview
Page 9
Back Panel
Figure 2 –Back Panel of the Unit
4-hole, 5-hole, or 6-pin Connector
Power Supply Input
Motor Hose Input

4 Installation and Preparation for Use
Page 10
4 Installation and Preparation for Use
WARNING: Installation of the device should be performed by a qualified service technician only
Location
A mounting accessory is supplied with the unit to aid installation of the system to a dental unit. The
placement and mounting location of the device is at the discretion of the dental office.
To mount the controller:
Attach the supplied controller mounting bracket in the desired location. The bracket contains four
holes on the surface wings to easily bolt it to the underside of a dental unit tray.
Mounting Bracket
Slide the controller unit into the bracket.
Using the four screws and washers supplied, mount the unit to the bracket by aligning the four slots
on the bracket base with the four holes on the bottom of the control unit.
Installation
Follow the following instructions to install the device:
Connect Power Supply
WARNING: Use only the Midwest®E motor and power supply supplied with the Midwest®E Electric
Handpiece System.
To connect the AC Power Adaptor:
1. Connect the power supply cord to the back of the control unit as shown in Figure 4 below.
2. Connect the power supply adaptor to the mains cable.
3. Plug the AC mains cable into a 120 VAC wall outlet.
NOTE:Maintain a clear path to the back of the control unit when mounting the device to the dental unit, such
that disconnection of the power line is still accessible.

4 Installation and Preparation for Use
Page 11
Figure 4 –Connect Power Supply
Connect Drive Air Tubing to the Control Unit
Connect the 4-hole, 5-hole, or 6-pin air and water supply tubing (according ISO 9168) to the four-hole
connection of the control unit (See Figure 5 below).
CAUTION: Compressed air supply must be clean, dry, and free from oil per ISO 7494-2. A filter, water trap, or
air dryer may be required. Failure to adhere may damage the motor or attachments of the device.
To prevent damage to the device, adhere to all pressure specifications as described in Chapter 12,
Technical Specifications. The specified pressure into the control unit must be between 3.5 - 4.0 bar
(50.8 to 58 psi).
Figure 5 –Connect Tubing to the Control Unit

4 Installation and Preparation for Use
Page 12
Connect the Dental Motor
1. Connect the motor hose to the control unit
Locate the motor hose pin connector on the back panel of the unit. Snap the hose male connector to the
female end on the unit aligning the pins together as shown in the figure below.
Figure 6 –Connect Motor Hose Tubing to the Control Unit
NOTE: This motor hose can be disconnected from the control unit by pulling the connector away from the
back of the unit for service and replacement.
2. Connect the Midwest®E motor to the motor hose tube
Lightly coat the O-rings on the motor with a lubricant spray. Align the pins on the motor with the holes on
the motor hose until the two matches; twist the two together to lock as shown in Figure 7 below.
NOTE: To Measure the air supply coming out of the end of the motor coupler as shown in Figure 8 below.
The value must be at least 10 l/min.
Figure 7 –Connect the Motor to the Supply Tubing
Figure 8 –Air supply measurement

4 Installation and Preparation for Use
Page 13
System Icons
Icons/Keys Used to Program and Operate the Device:
Button
Icon Name
Function
Mode
PREP
Preparation Mode
Main Menu
ENDO
Endodontic Mode
Main Menu
SETUP
Set Up Mode
Main Menu
HANDPIECE LIGHT
Instrument light on / off
Submenu:
illumination setting
Main menu and Set up menu
FIBER OPTIC
DELAY
Submenu:
illumination setting - delay time
Submenu in the Set up
CALIBRATION
Calibration of foot control /
working pressure
Submenu in the Set up
SPEAKER
Speaker (on / off)
(Audio)
Submenu in the Set up
CONTRAST/
BRIGHTNESS
Display contrast/brightness setting
Submenu in the Set up
UP
Change parameter values
Submenu and main menu
DOWN
Change parameter values
Submenu and main menu
DIRECTION OF
ROTATION
Direction of rotation
of the handpiece bur/file
Main menu
AUTO STOP
Torque-Stop Mode:
Auto Stop
Main menu E1 to E5
(Endodontic mode)
AUTO REVERSE
Torque-Stop Mode:
Auto Reverse
Main menu E1 to E5
(Endodontic mode)
AUTO REVERSE
FORWARD
Torque-Stop Mode:
Auto Reverse Forward
Main menu E1 to E5
(Endodontic mode)

4 Installation and Preparation for Use
Page 14
Button
Icon Name
Function
Mode
SPEED
Bur speed
Main menu E1 to E5
and P1 to P3
GEAR RATIO
Ratio setting of the low speed
attachments
Main menu E1 to E5
and P1 to P3
to
(E1, E2, E3, E4)
E1, E2, E3, E4
Memory cell for
Endodontic mode
Main menu
to
(P1, P2, P3, P4)
P1, P2, P3, P4
Memory cell for preparation
Main menu
TORQUE
Torque value setting
Main menu E1 to E5
DEMO
Demonstration of motor rotation
without air connection
Set up menu
START
Start motor
Demonstration mode
STOP
Stop motor
Demonstration mode
SERVICE
Service menu
- for service technician ONLY
Set up menu
FACTORY RESET
Factory settings
Set up menu
GEAR SETTINGS
[A / B]
Additional memory of reduction
ratio for future handpieces with
different ratios than currently
available
Set up menu

5 Set Up Mode
Page 15
5 Set Up Mode
Set Up Mode Operations
To enter in the Set Up Mode menu, press on the SETUP icon on the left of the home screen.
You will then enter into the Set Up Mode Menu as shown in Figure 10 below.
Setup Mode
SETUP Mode Icon
FACTORY RESET Icon
SERVICE Icon
HANDPIECE LIGHT Icon
CALIBRATION Icon
FIBER OPTIC DELAY Icon
GEAR SETTINGS Icon
SPEAKER Icon
CONTRAST/BRIGHTNESS Icon
STANDBY TIME Icon
AUTO REVERSE FORWARD TIME Icon
Figure 11 –Setup Mode Menu
DEMO Mode Icon
Set Up Mode (SETUP) allows the user to adjust the following:
Parameters
Setting options
Factory setting
Calibration
Foot Pedal
(0-100% compression)
N/A
Speaker
on / off
on
LCD Illumination
1 - 10
5
Fiber Optic Delay
1 - 5 sec.
2
Handpiece Light
1 - 9
5
Display contrast/brightness
more / less
zero setting
Reverse time of Torque-Stop Mode:
Auto Reverse Forward option
1 - 5 sec.
2 sec.
Demo Mode
Enter Demo Mode
N/A
Standby Mode
0 - 90 min
10 min
Additional Gear Settings Mode
1:1
Factory Reset
Factory Defaults
N/A
Service Mode
Service Sub-Menu
N/A

5 Set Up Mode
Page 16
Calibration
Calibration of the Midwest®E Electric Handpiece System should be performed each time the
device has been installed or moved to different location where the air pressure from the foot
pedal may vary.
To Calibrate the Foot Control:
1. Press the SETUP icon to enter Set Up Menu.
2. Press the PSI/BAR icon to start the calibration process .
3. The PSI/BAR icon will be highlighted to show you are in calibration mode.
Calibrating Maximum Foot Pressure:
4. At this time "MAX" will be displayed on the top left of the icon, if “MAX”is
not already displayed on the Calibration Icon, continue to press the icon
until "MAX" is displayed on the Calibration Icon.
NOTE: When "MAX" is displayed, the unit is ready to calibrate the maximum
pressure from the foot pedal.
5. While pressing and holding the foot control all the way down, Press and
Hold the CALIBRATION icon, until a signal sounds. Once a sound is heard,
maximum pressure has now been calibrated (to equal 100%).
After the signal sounds, the system will automatically change the icon to
"MIN", meaning the system is ready to calibrate the minimum pressure.
NOTE: To calibrate the MAX pressure again, simply toggle the CALIBRATION
back to MAX and repeat step 5.
Calibrating Minimum Foot Pressure:
6. The CALIBRATION icon should now have "MIN" displayed on it. If it is not
displayed, then continue to press the CALIBRATION icon until "MIN" is
displayed on the CALIBRATION icon.
NOTE: When "MIN" is displayed on the CALIBRATION icon, the unit is
ready to calibrate the minimal pressure.
7. With your foot completely off the foot control, press and hold the CALIBRATION
icon until a signal sounds. Once a sound is heard minimum pressure has
now been calibrated (to equal 0%).
The system will automatically save the values and exit the calibration mode,
once the minimum calibration value has been set. The CALIBRATION
icon will return to the picture shown on the right.
8. The Foot Control is now calibrated. Once the foot control has been
calibrated, the product is ready for use.

5 Set Up Mode
Page 17
To Turn ON/OFF Speaker Sound :
1. Pressing the SPEAKER icon changes the operating status of
the speaker.
2. If the icon has a slash through it, the speaker it is off; no slash
indicates the speaker is on.
To Adjust the Fiber Optic Handpiece Light Time Delay :
1. Pressing the FIBER OPTIC DELAY icon will activate the
setting menu to change the delay time of the handpiece fiber
optic light.
2. Pressing the "+" and "-" icons will toggle the time delay from
1 to 5 seconds (delay time).
3. Confirm the desired delay time by pressing the FIBER OPTIC
DELAY icon again. The saved value will appear at the bottom
right of the icon.
To Adjust the Hand Piece Light :
1. Pressing the HANDPIECE LIGHT icon will activate the
Handpiece light menu to adjust the handpiece light intensity.
2. Pressing the "+" and "-" icons will toggle light intensity.
3. Confirm the desired setting by pressing the HANDPIECE
LIGHT icon again. The saved value will appear inside the
icon.
To Adjust the Auto Reverse Forward Time during Reverse
1. Pressing the AUTO REVERSE FORWARD TIME icon will
activate the setting menu to change the reverse time.
The device will go reverse for “T” amount of time for the auto
reverse forward feature in ENDO mode.
2. Pressing the "+" and "-" icons will toggle the time
1 to 5 Seconds (reverse time).
3. Confirm the desired reverse time by pressing the AUTO
REVERSE FORWARD TIME icon again. The saved value
will appear inside the icon.
To Adjust the Display Contrast or Brightness :
1. Pressing the CONTRAST/BRIGHTNESS icon will activate
the setting menu to change the contrast/brightness of the
LCD screen.
2. Pressing (and holding) the "+" and "-" icons will toggle the
contrast.
3. Confirm by pressing the CONTRAST/BRIGHTNESS icon
again.

5 Set Up Mode
Page 18
To Adjust Standby Mode :
The standby mode switches off the display if the control is not active during the set
time. By setting 0, the standby mode is switched off. By activating the foot control
or touching the display, the display will wake up and all functions will be available.
1. Press the STANDBY TIME icon to enter the standby menu.
2. Pressing the "+" and "-" icons will toggle the time to enter
standby mode.
Possible settings include 0 to 90 minutes, in steps of 5 minutes.
3. Press the STANDY TIME icon again to confirm your choice.
To Adjust the Additional Gear Memory Settings (A or B) :
1. Press one of the GEAR SETTINGS icons (icon A or B) to
enter into the additional gear settings memory menu.
2. With the "+" or "–" icons, select the desired Gear Setting ratio
desired.
3. Press the GEAR SETTINGS icon again to confirm the setting
4. Repeat the same procedure above for Gear Ratio B.
To Reset Factory Settings :
All manual settings can be re-activated to the factory settings by pressing
the FACT SET icon button and holding until it beeps.
NOTE: All manual settings will be cancelled when this button is pressed.
Service Menu :
This icon is for use by Authorized Service Technicians Only.
To Enter Demo Mode :
WARNING: Never use Demo Mode for patient treatment
1. To enter Demo Mode, select the DEMO icon.
2. The screen will jump to the last previous program used.
3. Press the START button to start the test. The motor will start
running and continue to run for a maximum of 2 minutes.
4. The running cycle of the motor can be interrupted by pressing the
STOP icon.
5. When the test is done, press DEMO icon or SETUP icon and the
screen will go back to the previous menu or SETUP menu.

6 General Operation
Page 19
6 General Operation
General Operation
WARNING:
To Promote Infection Control:
Always adhere to protective measures when handling the device with patients.
After use with a patient, spray air and water through the device for at least 20 seconds.
After prolonged storage of the device, first flush water and air lines to remove any stagnation that
occurred during storage.
Handpiece attachments and motors should be sterilized between patients. Sterilize both
handpiece attachments and motors before use, both are supplied non-sterile.
Follow all cleaning and maintenance procedures as described in the Cleaning and Mainenance
Section 9 of this manual for the control unit and hoses.
Always Confirm Safe and Accurate Device Operation by:
Confirming all input values before use, including: motor speed in relation to the appropriate
handpiece attached, torque limits, and drill direction.
Monitoring device operation during use. Stop using the device immediately in the event of
damage, irregular running noises, excessive vibrations, unusual generation of heat or if the rotary
instrument is not firmly gripped.
Ensuring the motor is running at the desired speed by pressing down on the foot control for
2 seconds before starting the procedure to allow the device to reach its target speed.
Confirming device is not in Demo Mode. Never use Demo Mode for patient treatment.
The Midwest®E Electric Handpiece System is not intended to replace proper clinical judgment. Dentists
and associated assistants should always adhere to their local standard operating procedures and ensure
the device is working as intended prior to use.

6 General Operation
Page 20
Operational Mode Options
The Midwest®E Electric Handpiece System provides two operational Modes and one Set Up Mode for
procedural use:
Preparation Mode (PREP)
For general preparation, Non-Endodontic Procedures; information on Operating Instructions using
PREP mode, can be found in "Preparation Mode Operations" on page 20.
Endodontic Mode (ENDO)
For performing Endodontic Procedures; information on operating instructions using ENDO mode
can be found in "Endodontic Mode Operations" on page 22.
Set Up Mode (SETUP)
Allows user to change various settings on the device; information on operating instructions under
the SETUP mode can be found in "Set Up Mode Operations" on page 15.