Guilin Woodpecker Medical Instrument Ai-Pex User manual

Please read this manual before operating.
Industrial design patent No.: ZL 201930704918.8
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 ................................................................. 17
5 Trouble shooting ....................................................................................... 22
6 Cleaning, Disinfection and Sterilization.................................................... 25
7 Storage, maintenance and transportation .................................................. 28
8 Environmental protection .......................................................................... 30
9 European authorized representative........................................................... 30
10 After service ............................................................................................ 30
11 Symbol instruction .................................................................................. 30
12 Statement ................................................................................................. 31
13 EMC - Declaration of conformity............................................................ 31

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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 , Touch probe and Pulp tester 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: 101mm (length) × 101mm (width) × 175.5mm (height)
1.3.2 Weight: 685g
1.3.3 Model: Ai-Pex

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1.4 Components
1.4.1 Picture of the main unit. ( Picture 1 )
1.5
1.0
0.5
0.0
OVER
APEX
R
Picture 1

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1.4.2 Pictures of the main accessories ( Picture 2 )
Picture 2
1.5 Structure
Is composed of main unit, measuring wire, lip hooks, file clip, touch probe,
adapter, Pulp tester probe, etc..
1.6 Intended use
This equipment applies to the measurements below:
1.6.1 Used to help determine the working length of various types of dental root
canals during root canal treatment.
1.6.2 Used to test pulp vitality.
1.6.3 The device must be operated in hospital and clinic by the qualied dentists.

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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 Ⅱ equipment
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, Pulp tester probe
1.9 The main technical specications
1.9.1 Battery: 3.7V/2000mAh (Model: 18500)
1.9.2 Adapter (Model: DJ-0500100-A5/ADS-6AM-06N 05050):
Input: ~100V-240V 50Hz/60Hz 0.4A MAX
Output: DC5V/1A
1.9.3 Consumption power: ≤0.5W
1.9.4 Screen: 3.8’’ LCD
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%.

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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 0.5-1mm
from the length measured by the Apex locator.
2.3 The scales 0.5 and 1.0 on the screen dial do not indicate that the distance to
the apex is 0.5 mm or 1.0 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.
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 3.1.2).
2.8 The le clip, lip hook and touch probe, Pulp tester 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

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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
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.

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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.
2.22 Please to remove the battery if the me equipment is not likely to be used for
some time.
2.23 Do not place foreign bodies such as metal in the groove of the base.
3 Installation of the device
3.1 Apex Locator Mode
3.1.1 Preparation
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
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.
Insert the le clip and lip hook respectively into the two sockets of the measuring

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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).
3.1.2 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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1.0
0.5
0.0
OVER
AL
Mode
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.
3.1.3 Determine the working length
a) When the indicating bar reaches the position of the dial 0.0[Picture 7(a)],
[Picture 7(b)] and there is "APEX" on screen, the endo file has reached the
anatomical apical foramen. On the basis of measured length, subtract 0.5-1.0 mm to
get the working length.
b) When the indicating bar reaches the red area "OVER"[Picture 7(c)], it indicates
that the endo le has exceeded the apical foramen.

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1.0
0.5
0.0
OVER
AL
Mode
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.
3.1.4 Apical Stop Setting
Set the Apical Stop between 0.0 and 0.5 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 8
3.1.5 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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1.5
1.0
0.5
0.0
APEX
AL
Mode
Picture 9
b) Insert the tester.
c) After powered on, If the indicating bar indicates within ±1 bars away from the
dial 0.0 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.
3.1.6 Connect to compatible Endo Motor. (Optional)
Plug 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】:
① Please 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.
3.2 Pulp test mode
This mode is a method to determine pulp condition by observing the tolerance of
the teeth to pulse signals of dierent intensities. The pulse signal intensity of pulp
automatically increases from low to high, with values ranging from 0 to 80.

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3.2.1 How to use the pulp test function:
1. The purpose of the test should be explained to the patient to eliminate
unnecessary nervousness and to win the patient's cooperation. The patient should
also be instructed to raise his or her hand immediately when there is a feeling of
tingling.
2. Insert the measuring wire into the corresponding interface of the machine, and
insert the pulp tester probe and the lip hook into any two sockets of the measuring
wire respectively.
3. Power on and long press the mode button for more than 2s to switch to the pulp
test mode (PT mode), as shown in Figure 11.
1.5
1.0
0.5
0.0
OVER
APEX
R
Picture 11

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4. Select the volume and pulse level by pressing the mode button, and then adjust
the volume and pulse speed by pressing the adjustment button.
5. Isolate the tooth under test from moisture and blow to dry the tooth surface. If
there is calculus at the tooth neck, it must be cleaned.
6. Place the lip hook at the corner of the patient’s mouth, and apply a layer of
conductive agent (e.g. toothpaste) to the pulp tester probe. Place the probe on the
middle 1/3 of the labial (buccal) surface or 1/3 of the tooth neck.
7. When the probe and the hook are in good contact, the reading will
automatically increase slowly from “0”. Remove the probe when the patient reacts
and record the value causing the reaction. Generally, the test can be repeated twice
and the average value should be taken. If there is a big dierence between the two
values, the third test should be performed, and then the average of two similar values
should be taken.
8. If the contact with the tooth to be tested is interrupted and contact is made
again within 1s, the pulse value will not be cleared, and the test can be continued
without resetting.
9. Before testing the aected tooth, a normal control tooth needs to be tested to
obtain a relative normal response value as a control. The control tooth is preferred to
the contralateral normal tooth of the same name, followed by the corresponding jaw
tooth of the same name and nally the healthy adjacent tooth in the same quadrant as
the aected tooth.
Note: The value obtained by the pulp tester must be compared with the normal
control tooth before it is of diagnostic value. Since the intensity of response to
the pulse signal varies from patient to patient, there will be false positive or false
negative performance in practice, so pulp test cannot be used as the only basis for
diagnosis.

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3.2.2 Possible causes of false positive results of pulp test
1.The probe touches a large area of the metal restoration or the gums, causing the
current to ow to the periodontal tissue.
2. Insufficient moisture isolation or drying of the tested tooth causes current
leakage to periodontal tissue. Periodontal and pulpal responses are significantly
dierent. Prior to pulp test, the sensation of the tooth to be tested can be compared
with the direct stimulation of the periodontal tissue.
3. Liqueed necrotic pulp has the potential to conduct current to the periapical
tissue and the patient may have a slight reaction when the current is adjusted to the
maximum scale.
4. What the patient feels is the stimulation of the adjacent teeth.
5. The patient is so stressed and anxious that he/she signals a response when the
probe rst touches the tooth surface or when he/she is asked about feelings.
3.2.3 Possible causes of false negative results of pulp test
1. The patient has had prior use of analgesics, narcotics, or alcoholic, etc. that
prevent the teeth from perceiving electrical stimulation properly.
2. The pulp test probe fails to eectively contact the tooth surface, preventing the
transmission of the pulse signal to the pulp.
3. The pulp of newly erupted teeth with immature apices is usually unresponsive
to electrical stimulation.
4. The pulp of over-calcified teeth in the root canal is usually unresponsive to
electrical stimulation and is common in aected teeth of some elderly.
5. Recently traumatized aected teeth may not respond to electrical stimulation.
6. Other conditions that cause degeneration of the dental nerve.
Warning: The pulp test may interfere with the operation of the pacemaker and is
therefore contraindicated in patients with pacemakers in the heart. Please refer to the

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relevant contraindications in section 1.7 for details.
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 An fully exposed access cavity to show the pulpal cabin.
4.1.4 A 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.
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].

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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
insulators [Picture 14]
Picture12 Picture13 Picture14
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 an inaccuracy when the endo le touches metal crown [Picture 17].