Guilin Woodpecker Medical Instrument DTE User manual

Please read this manual before operating.
Industrial design patent No.: CN 201130378913.4
Apex locator
Instruction Manual

Contents
1 Introduction ................................................................................................. 1
2 Notice of installing and using the device ................................................... 5
3 Installation of the device ............................................................................. 7
4 Product function and operation ................................................................. 14
5 Trouble shooting ....................................................................................... 19
6 Disinfection, cleaning and sterilization procedure for the accessories ..... 24
8 Environmental protection .......................................................................... 28
9 European authorized representative........................................................... 28
10 After service ............................................................................................ 28
11 Symbol instruction .................................................................................. 29
12 Statement ................................................................................................. 30
13 EMC - Declaration of conformity ........................................................... 30

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1 Introduction
1.1 Foreword
Guilin Woodpecker Medical Instrument Co., Ltd. is a professional manufacturer
in researching, developing and producing dental equipment which has a wholesome
quality assurance system.
Products include ultrasonic scaler, curing light, apex locator and ultrasurgery, etc.
1.2 Description of the device
Apex locator is a supporting equipment of endodontic treatment, through the
measurement of the length of apical teeth, helping dentists to nish the endodontic
treatment.
Features of the device:
a) Equipped with clear bright LCD, clear image and dierent colors indicate the
trajectory of the le clearly.
b) Based on advanced multiple frequency network impedance measurement
technology and automatic calibrating ensures the measurements are accurate.
c) The File clip, Lip hook and Touch probe can be autoclaved under high
temperature and high pressure, avoiding cross infection eectively.
d) Battery is rechargeable, unnecessary to replace batteries repeatedly.
1.3 Model and dimensions
1.3.1 Dimensions: 138mm (length) × 77mm (width) × 107mm (height)
1.3.2 Weight: 385g

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1.3.3 Model: DPEX V
1.4 Components
1.4.1 Picture of the main unit. ( Picture 1 )

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1.4.2 Pictures of the main accessories ( Picture 2 )
Measuring wire File clip Lip hook Touch probe
Battery Adapter Tester
Picture 2
1.5 Structure
The model is composed of main unit, measuring wire, lip hooks, le clip, touch
probe, adapter, etc.
1.6 Intended use
This equipment applies to the measurements below:
1.6.1 Measurement of pulpitis, pulp necrosis, periapical periodontitis and tooth
length.

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1.6.2 Measurement of the tooth length before restoration of post crown.
1.6.3 Measurement of the tooth length of transplantation and retransplantation.
1.6.4 The device must be operated in hospital and clinic by the qualied dentists.
1.7 Contraindication
We do not advise the use of the model on patients tted with pacemakers (or other
electrical equipment) or on those patients who are advised not to use the electric
equipment (like electric shaver, electric blower) for safety reasons.
1.8 The classication of the device
1.8.1 Type of protection against electric shock: Class Ⅱequipment
1.8.2 Degree of protection against electric shock: Type B applied part
1.8.3 Degree of protection against water shock: Ordinary equipment ( IPX0 )
1.8.4 Device not suitable for being used in the presence of a ammable anesthetic
mixture with air or with oxygen or nitrous oxide.
1.8.5 Operation mode: Continous operation
1.8.6 Applied part: Touch probe, Lip hook, File clip
1.9 The main technical specications
1.9.1 Battery: 3.6V/750mAh (Model:14500)
1.9.2 Adapter (Model:DJ-0500100-A5):
Input: ~100V-240V 50Hz/60Hz 0.5-0.2A
Output: DC5V/1A
1.9.3 Consumption power: ≤0.5W
1.9.4 Screen: 4.5’’ LCD

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1.9.5 Buzzer alert: The buzzer will alert when the endo le is close to the apex.
1.9.6 Release software version: V1
1.9.7 Operation condition
a) Environment temperature: +5℃～+40℃
b) Relative humidity: 30% ～75%
c) Atmosphere pressure: 70kPa ～106kPa
2 Notice of installing and using the device
2.1 Please read the instruction manual carefully before the operation.
2.2 When the indicating bar reaches the position of the dial 0.0, and there is
"APEX" on screen, the endo file has reached the anatomical apical foramen. To
guarantee the safety, the work length is clinically obtained by subtracting 0.5-1 mm
from the length measured by the Apex locator.
2.3 The scales 0.5, 1.0 and 2.0 on the screen dial do not indicate that the distance
to the apex is 0.5 mm, 1.0 mm or 2.0 mm. It just reminds the operator that the le is
getting close to or away from the apical foramen.
2.4 If the screen bar graph suddenly makes a large movement or immediate
display ‘OVER’ in the upper part of the canal, continue slightly towards the apex so
the signal returns to normal.
2.5 In order to prevent leakage or interference between the root canal and
resulting in inaccurate measurements, dry the access cavity with a cotton pellet or
air-blower before each use.

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2.6 Use a le size adapted to the root canal diameter. The selected le is too small
for a large root canal might cause the screen digital display is not steady during the
procedure.
2.7 In order to conrm the le clip and measuring wire makes good contact, test
the wire connecting before each use(See 3.1.3).
2.8 The le clip, lip hook and touch probe are reusable. Please make sure they
are autoclaved under high pressure and high temperature before each operation. The
endo les should not be used more than 3 times.
2.9 The batteries must be taken out for storage when the device is not used for a
long time.
2.10 Please recharge the battery when low battery indicator ashes.
2.11 Please use original components, the components made by other companies
may cause inaccurate measurement or un-measurable.
2.12 Avoid the connection between the outside and inside liquid of endodontic
during measuring in order to avoid the measuring dierence.
2.13 Keep endo le and le clip away from any other metal or instruments.
2.14 To ensure that short circuits do not impair the measurements, be particularly
careful with patients tted with metal crowns or bridges. Please conrm the wetness
of the endo to ensure the reliability of the measuring. If it is conrmed that the endo
le hasn't reached the apex yet the data showed on the apex locator is too low, please
check whether the endo is too dry and conrm it with X-ray.
2.15 This device have electromagnetic interference, the patient or doctor who

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with a heart pace maker are forbidden to use this device and the device is susceptible
to other device which produces electromagnetic interference. Dentists should be
cautious about operation under such environment.
2.16 The guarantee is valid for normal usage conditions. Any disassembly will
render the guarantee void, the professionals of Woodpecker company will oer the
repair service during guarantee period.
2.17 Any modication will render the guarantee void and may cause harm to the
patient.
2.18 Only the original adapter and lithium battery could be used to this machine.
2.19 Not to position equipment to make it dicult to operate the disconnection
device.
2.20 The adapter must be connected to an appropriate power source in the
instructions.
2.21 Error in replacing lithium batteries can lead to unacceptable risks, so use the
original lithium battery and replace the lithium battery according to the correct steps
in the instructions.
3 Installation of the device
3.1 Measurement preparation
3.1.1 Insert the plug of the measuring wire into the right side socket of the unit.
Attention:
a) Please be careful to use the device, keep it stable and avoid hit. Incautious use

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will lead to the damage or the failure of the machine.
b) Measurement can not be proceeded without the complete insertion of the plug.
c) Be sure not to hit the plug. Keep the device away.
3.1.2 Insert the le clip and lip hook respectively into the two sockets of the
measuring wire. When the Apex Locator is used alone, there is no dierence
between the gray end and the white end of measuring wire [Picture 3]. But if the
Apex Locator is connected to the Endo Motor, please connect the white end with
the lip hook and the gray end is suspended.
Attention:
Be sure not to pull the wire when inserting or pulling out the the measuring wire
and the le clip. [Picture 4 (a)]
Correct operation showed as in picture 4 (b).
3.1.3 Test the wire connecting (Test before each use)
a) Press the power switch. Make sure the scene of measuring the length of the
root canal displayed on the LCD screen.
The device will shutdown automatically after 5 minutes without operation.
b) Make sure if the plug of the measuring wire is inserted into the socket correctly.

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c) Make sure if the file clip and lip hook are connected well to the measuring
wire.
d) Make the lip hook touch the bent wire of the le clip [as showed in picture
5] make sure the connection icon on the LCD screen shows steadily [as showed in
Picture 6], otherwise , it means that the le clip or the measuring wire is damaged,
should be replaced.
3.1.4 Determine the working length
a) When the indicating bar reaches the position of the dial 0.0, and there is
"APEX" on screen, the endo le has reached the anatomical apical foramen. On the
basis of measured length, subtract 0.5-1.0 mm to get the working length.[Picture 7
(a)]
b) When the indicating bar reaches the red area "OVER", it indicates that the endo
le has exceeded the apical foramen. Acontinuous beep sound will be generated at
the same time. [Picture 7(b)]

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Picture 7
* The working length will dier somewhat depending on each individual tooth.
This discrepancy must be judged by the dentist as he/she works on the tooth.
* Make sure to take an X-ray to check the results.
3.1.5 Enlarged display of apical foramen. [Picture 8]
Picture 8
3.2 Testing the device by tester(Test every two weeks)
Users can use the tester to check if the device work properly, specic operation is
as follows:
a) Pulling out the the measuring wire and turn o the device.

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Picture 9
b) Insert the tester.
c) After powered on, If the indicating bar indicates within ±3 bars away from the
dial 0.5, the device functions normally [Picture 9]. If the indicating bar is outside
the range, the device cannot measure accurately. On this occasion, please contact
authorized distributor or manufacturer for help.
3.3 Connect to compatible Endo Motor. (Optional)
3.3.1Plug one end of the USB line into the USB socket on the right side of
the device, and connect the other end with compatible Endo Motor as shown in
Picture 10(a). There is no dierence between those two ends. As shown in Picture
10 (b), when the Contra-angle icon is lit, the Apex locator and Endo Motor can
communicate normally, so that the 2-in-1 function can be realized in Endo Motor.

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Picture 10
【Cautions】:
①Please use the Apex locator carefully and do not drop it or hit it. Careless use
may bring risk of damage to the machine or malfunction.
②If the USB wire was not completely plugged into the USB socket, the Apex
locator cannot communicate with the Endo Motor.
③After plugging the USB wire into the USB socket, please do not drop anything
on it, and do not hit the USB socket.
3.4 Set the Apical Stop between 0.0 and 1.0 by pressing the middle button, and
the set parameter will be automatically saved. When the le reaches the Apical Stop,
the device will beep continually.

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Picture 11
3.5 Charge the battery
When the power indicator ashes, please stop using the device, as it shows that
the remaining power is not enough.
3.5.1 Connect the AC adapter and the socket on the left of the device properly,
and insert the AC adapter plug to the power socket.
3.5.2 When the yellow indicator on, it shows the device is charging; when the
yellow indictor turns to green indicator, it shows charging has nished. It may take
120minutes for charging.
3.5.3 After charging, please pull the AC adapter and plug out.
Attention: please don’t use the device when it is charging, and the operator
should be over 2 meters away from the device.

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4 Product function and operation
4.1 Usage requirements
Apex locator should be precise, repeatable, and easy to operate. The following
requirements are necessary besides the proper operation method.
4.1.1 The operation should be according to the manual.
4.1.2 The dentists should have the knowledge of teeth position and average length
and the skill to operate the device.
4.1.3 A fully exposed access cavity to show the pulpal cabin.
4.1.4 An X-ray photo to show the whole length and root canal of the teeth.
4.1.5 The endo le should not be too big nor too small to avoid cutting through
the apical foramen.
4.1.6 Mark an anatomized symbol on the diseased tooth and memorize it on the
case history. This symbol should be marked on the health bridge or on the tooth
filled integrated. The position of the mark should be on the incisal edge of the
anterior tooth or on the spire of the molars. For those bridge that's broken obviously,
this symbol should be on the tooth surface supported by the dentin instead of on the
suspended enamel.

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Picture 12 Picture 13 Picture 14
4.1.7 The acute inammation surrounding the apex has been gone and the infected
material has been cleaned. It is also necessary to get rid of the pulp and necrosis
tissue.
4.1.8 The following cases are not suited for a normal measurement:
a) The size of the root similar to the size of apical foramen.
In this case, the measurement result of the length of the root canal will be shorter
than its real because of the hypoplasia of the root [Picture 12].
b) Bleeding or the blood overow from the apical foramen.
In this case, the blood will overflow from the root canal and reaches gingival
that the blood and the gingival will be on a conducting state which will cause an
inaccurate result while measuring. The measurement can be continued when the
bleeding is stopped [Picture 13].
c) The tooth crown is broken.
The tissue of the gingival may reach the cavity of the endo hole at the broken
point which will cause inaccuracy because of the electronic conduction. The
measurement can be continued when the crown is fixed by gypsum or other

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insulators [Picture 14].
d) There is a crack on the tooth root
In this case, the crack may cause the electric
leakage which will affect the accuracy of
measurement [Picture 15].
e) A retreatment to an endo which was lled with
gutta-percha.
Clean the remaining material in the root canal
and ll it with little normal saline before a measurement [Picture 16].
f) There is a metal crown which has connected to the gingival.
It will cause inaccuracy when the endo le touches metal crown [Picture 17].
Picture 15 Picture 16 Picture 17
Sometimes, the results of the Apex Locator and X-rays do not meet each
other,which is neither because the machine is not normal, nor the photo is incorrect
taken.The actual position of the apical foramen is different from the anatomical
one, it is very common that the apical foramen slightly to the side of the root canal
crowns.In this case, according to the shooting angle as the belowing pictures show,
it will cause illusion that the front tip of the root canal haven’t reached the canal tip.

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[Picture 18]
(Because of the angles of X-rays,sometimes it can’t take photo of the apical
foramen properly, so it can’t show the accurate position of the apical foramen.)
4.2 Instruction
4.2.1 Insert the plug of measuring wire into the socket in the side of main unit.
Turn it on. The battery is on the left of screen.
4.2.2 The equipment is in the normal condition. The equipment shuts down after
5 minutes without use.
4.2.3 The volume is adjustable. Please press the volume bottom for a setting.
Picture 19 Picture 20
4.2.4 Hang the lip hook on the lip, make sure it contact the oral mucosa as a
reference electrode [Picture 19].
4.2.5 Clip the file with file clip, approach to the apex, then there will be
continuous alarm when the distance is less than 2mm [Picture 20].
Attention:
a) When grip the root canal with a needle le, please grip the upper of the metal

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part (near the root canal at the needle handle). If you grip the lower part (blade or
moving part), it will wear the metal part of the le folder and the resin part. [Picture
21]
Picture 21 Picture 22
b) When measuring the length of root canal, please don’t use the metal needle le.
If you operate the device without the dentistry glove,it will cause leakage and the
result of measurement will be inaccurate.Therefore, please use the resin needle le
and remember don’t touch the metal part with nger.
c) Please don’t use the worn le clip, and it will make the result of measurement
inaccurate.
d) Please reference the [Picture 22(a)] to grip the needle le. If as [Picture 22 (b)],
it can’t properly measure the length of the root canal due to the improper force, and
the front of the root canal pin is easy to wear.
4.2.6 When the le reaches the apex, adjust the rubber piece set on the endo le to
the reference point (incisal edge or fossa edge), then pull out the endo le, measure
the length between the top of the le and the rubber piece, and this is the working
length of the tooth. It also can be used with the touch probe instead of le clip, when