Guilin Woodpecker Medical Instrument Minipex User manual

Apex locator Minipex
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 ..............................................................................11
5 Trouble shooting ....................................................................................................17
6 Cleaning, Disinfection and Sterilization.................................................................21
7 Storage, maintenance and transportation ..............................................................30
8 Environmental protection .......................................................................................31
9 After service ...........................................................................................................31
10 Symbol instruction ...............................................................................................32
11 For technical data, please contact .........................................................................34
12 Statement ..............................................................................................................34
13 EMC - Declaration of conformity.........................................................................34

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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.
There are two brands of WOODPECKER Company: WOODPECKER and DTE.
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) 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.

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1.3 Model and dimensions
1.3.1 Model: Minipex
1.3.2 Dimensions: 70mm (length) × 62mm (width) × 20mm (height)
1.4 Components
1.4.1 Picture of the main unit. ( Picture 1 )
Picture 1

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1.4.2 Pictures of the main accessories ( Picture 2 )
Measuring wire File clip Lip hook
Adapter Battery Touch probe
Picture 2
1.5 Structure
Minipex 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.
1.6.2 Measurement of the tooth length before restoration of post crown.

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1.6.3 Measurement of the tooth length of transplantation and retransplantation.
1.7 Contraindication
We do not advise the use of Minipex 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 BF 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
1.9 The main technical specications
1.9.1 Battery: 3.7V/320mAh
1.9.2 Adapter: ~100V-240V 50Hz/60Hz
1.9.3 Consumption power: ≤0.5W
1.9.4 Screen: Segment digital tube
1.9.5 Buzzer alert: The buzzer will alert when the endo le is less than 2mm to the
apex.
1.9.6 Operation condition
a) Environment temperature: +5℃～+40℃

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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 As a safety precaution in order to avoid over-instrumentation, it is recommended
to proceed as follows: place the le onto an endodontic ruler, where the apex locator
screen indicates ‘00’. Subtract 0.5-1 mm from the measured file length as the
Working Length.
2.3 The scale indication on the apex locator screen does not represent a distinct
length or distance in mm or other linear units. It simply indicates the touch probe
progression towards the apex 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.

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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.
2.10 When the battery is low, a battery indicator " " appears on the status bar
of the screen. Please recharge the battery when the battery charging prompt icon is
blinking.
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

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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 modification 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.
3 Installation of the device
3.1 The Connection of the Measuring Wire
3.1.1 Insert the plug of the measuring wire into the left 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.
3.1.2 Insert the file clip and lip hook respectively into the two sockets of the
measuring wire. [Picture 3(a) ]

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Picture 3(a) Picture 3(b) Picture 3(c)
Attention:
Be sure not to pull the wire when inserting or pulling out the the measuring wire and
the le clip. [Picture 3(b) ]
Correct operation showed as in Picture 3(c).
3.1.3 Connection Test
a) Press the power switch. Make sure the scene of measuring the length of the root
canal displayed on the screen.
The device will shutdown automatically after 5 minutes without operation.
Picture 4 Picture 5

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b) Make sure if the plug of the measuring wire is inserted into the socket correctly.
c) Make sure if the le clip and lip hook are connected well to the measuring wire.
d) Make the file clip nip the lip hook[as showed in picture 4], the “Connection
test ” icon must appear on the status bar[as showed in picture 5]. If no icon
appears, it means that the le clip or the measuring wire was damaged, should be
replaced.
3.1.4 Explanations on the interfaces displayed
a) The screen displays the front region of the apical foramen by bars. Please refer to
the blue region as showed. [Picture 6(a)]
b) The le has gone to the position near by the apical foramen when the yellow bars
displayed [Picture 6 (b)].
c) The file has exceeded the apical foramen when the "OVER" bars displayed. A
continuous beep sound will be generated at the same time [Picture 6 (c)].
3.1.5 Enlarged display of apical foramen. [Picture 7]
Picture 6(a) Picture 6(b) Picture 6(c)

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Picture 7
3.2 Charge the battery
When the battery is low, a battery indicator appears on the status bar of the screen.
Please recharge the battery when the battery charging prompt icon is blinking.
However, it is still functional for several treatments before the device shuts down.
3.2.1 Connect the AC adapter and the socket on the left of the device properly, and
insert the AC adapter plug to the adapter socket.
3.2.2 During battery charging the battery symbol will blinking, then will remain
steady when charging is completed.
3.2.3 After charging, please pull the AC adapter and plug out.
3.3 Sound adjustment
The device is equipped with an audio indicator which enables monitoring of the
progression of the le within the canal in addition to visual monitoring.
The volume can be adjusted to three different levels: mute, low, normal, by

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successively pressing the “ Sound adjustment” button.
When sound level is muted the “ Sound indicator” icon is turned o. At other
sound levels the “ Sound indicator” icon remains turned on.
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 lled

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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 8].
b) Bleeding or the blood overow from the apical foramen.
In this case, the blood will overow 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 9].
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 xed by gypsum or other insulators [Picture 10].

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d) There is a crack on the tooth root
In this case, the crack may cause the electric leakage which will aect the accuracy
of measurement [Picture 11].
e) A retreatment to an endo which was lled with gutta-percha.
Clean the remaining material in the root canal and fill it with little normal saline
before a measurement [Picture 12].
f) There is a metal crown which has connected to the gingival.
It will cause inaccuracy when the endo le touches metal crown [Picture 13].

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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 dierent 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. [Picture 14]
(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

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minutes without use.
4.2.3 The volume is adjustable. Please press the volume bottom for a setting.
4.2.4 Hang the lip hook on the lip, make sure it contact the oral mucosa as a reference
electrode [Picture 15].
4.2.5 Clip the le with le clip, approach to the apex, then there will be continuous
alarm when the distance is less than 2mm [Picture 16].
Attention:
a) When grip the root canal with a needle le, please grip the upper of the metal 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 17]

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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 18 (a)] to grip the needle le. If as [Picture 18 (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

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length of the tooth. It also can be used with the touch probe instead of le clip, when
it is inconvenient to measure the back teeth [Picture 19].
4.2.7 The components that touch body must be autoclaved under high temperature
and high pressure. The shell and measuring wire should be cleaned by 75% alcohol.
Attention: Avoid the silk-screen when cleaning.
5 Trouble shooting

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Problems Possible causes Solutions
No power and no signal on
the screen after the power on.
1. If the battery is placed correctly?
2. If the battery with no power?
1. Re-install the battery.
2. Recharge the battery.
The length of the root canal
cannot be measured.
1. If the measuring wire is connected
correctly?
2. If the measuring wire is broken?
Confirm the measuring wire is plugged
rmly, link the lip hook with the le clip
to check if the measuring wire is broken.
No sound of alarm. If the volume is set at “mute”? Adjust the sound level.
The “charging prompt”
icon didn’t blinking when
charging battery.
1.The adapter is not connected well.
2.Have used faulty adapter with excessive
output.
3.The battery is not installed well.
4.The battery has been damaged.
1.Reconnect the adapter.
2.Change the adapter, must use the
original adapter.
3.Reinsert the battery and then reconnect
the adapter.
4.Change the battery and then reconnect
the adapter.
Display not steady while
measuring: the measurement
result is rather longer or
shorter; numerical display
irregular.
If the connection between the lip hook
and the oral mucosa is ok?
Make sure the lip hook has contacted the
oral mucosa at a good position.
Is there a blood/saliva overowing, glued
to the crown?
Blood, liquid overflow from the root
canal, glued to the crown or the tooth
neck, will cause short-circuit then cause
the in-normal phenomena. Clean the blood
and the liquid.