NEXO Dental Handpieces User Manual

NEXO Dental Handpieces

FEATURES

• The NO RETRACTION structure in the handpiece, prevents suction of oral fluids in the patient’s mouth in the water line of the handpiece at the spray water outlet port.
• The new triple water spray system can cool the treated area and the bur effectively and roundly. Clogging of the spray port is reduced to a minimum.
• The “push button” type of retention makes it easy to change the cartridge.
• Quick coupling parts are easy to load or unload from the dental unit tubing.
• Water spray can be controlled in the quick coupling.
• It offers a better view and angle, improving your efficiency.
• High density cartridge increases cutting efficiency and reduces vibration and noise.
• New handle design, more comfortable to hold and easy to clean.
• Both the handpiece and the quick coupling are sterilizable (up to 135 ºC).
• The handpiece is composed of cartridge, head, handle and handpiece.
• Glass of cellular optical fibers are more bright and durable under repeated sterilization.
• NEXO high and low speed handpieces should be used professionally by dentists to diagnose, cure and operate on patients’ teeth.

CAUTION
Before each use, all instruments and accessories should be inspected for proper operation.

• When using the handpiece, protect the patient at all times.
• Before each use, make sure that the bur is fully seated and locked in the instrument.
• Use only burs from reputable manufacturers with a shank diameter of 1.59mm~1.60mm, and a maximum overall length of 23mm (0.9”).
• After prolonged use, the handpiece may become noisy, replace the cartridge with a new one distributed by NEXO. Failure to replace the cartridge may result in accidents or damage to the operator’s hearing.
• If the button is pressed while the handpiece cutter is rotating, OVERHEATING will occur. Special caution should be exercised. Special care must be taken during use to keep cheek tissue AWAY from the handpiece pushbutton. Contact with the cheek tissue may cause the pulsator to disengage and patient injury may result.
• NEXO turbines must not be rebuilt. Replacement of the bearings alone could result in unexpected failure and patient injury due to the different factors of new versus old components.
• Burs must be fully inserted into the chuck for proper bur retention. Extended burs could result in bent burs, inadequate cooling or personal injury due to bur ejection.
• Patients with heart disease, pregnant women and infants should exercise caution when using it. At the end of the product’s useful life, the metal can be recycled.
• Storage and transport of the products should be in an environment with the following characteristics: dry, stable (no collisions), clean, at normal temperature and pressure, away from acid gases and other harmful chemicals.
• Maintenance should be performed by professionals.
• Hemophiliacs should exercise caution when using it.
• Patients with pacemakers or physicians should exercise caution when using it.

AIR SUPPLY PRESSURE

Set the pressure at the back end of the handpiece to 206~231 KPa (2.1~2.35 kgfcm2).
If a net use pressure gauge is available, set the air pressure to 241~275 KPa (2.45~2.8 kgf/cm2) on the drive air pressure gauge on the unit.
Under the above recommended operating pressure, the air consumption is< 1.5 L/min.

CAUTION

• Do not exceed the recommended air pressure. This is important to avoid higher speed which could cause excessive bearing failure.
• To prevent the life of the unit, it is essential to use dry, purified compressed air and to maintain air and water quality by regular maintenance of the compressor and filtration systems. The use of unfiltered hard water will cause early blockage of tubing, connec-tors and spray cones.
• The life cycle of this product should be in accordance with the requirements of the relative local laws.

CAUTIONS ON BURRS

• ISO standard shank diameter is 1.59mm~1.60mm; standard length is 21mm~23mm.
• DO NOT use bent, worn or damaged burs.
• Always use clean burs. Unclean burs may cause unwanted pressure in the chuck.
• Insert a bur all the way into the chuck until it stops.
• DO NOT use short shank end mills.

CHANGING BURS

1. How to remove the burs
   Press the button on the head cover with your thumb to make it click, and remove the burr (Fig.1).

2. Installing the burs
   Insert the bur into the head until it stops. Press the button and continue to insert the bur into the head until it stops. After the bur is held in place in the chuck, push the bur further into the chuck before use to increase the gripping power of the chuck.

CAUTION

• Always keep the drill clean. Dirt and debris in the shank can cause jamming of the chuck, loss of gripping power or premature wear of the chuck.
• Never operate the handpiece without a bur, or the bearing will be damaged.
• Do not remove the bur or press the pushbutton while the unit is in operation.
• Clean and lubricate the handpiece beforehand.

CONNECTING COUPLING TO HANDPIECE

1. Remove the coupling: Hold the quick coupling and the handpiece firmly, pull back slightly to remove the coupling.
2. Insert the coupling: Insert the quick coupling into the handpiece, and tighten sufficiently.

CONNECTING COUPLING TO HANDPIECE HOSE

Connect the air inlet hose, air outlet hose, air spray hose, water inlet hose and electric cable socket correspondingly to the handpiece hose, and then screw the thread sufficiently.

WATER CONTROL IN THE QUICK COUPLING

The water spray is at maximum when the points are at the same level; the water spray can be controlled until it stops when the control part is turned to the right side (Fig. 2).

LUBRICATION

Provide spray lubricant or other standard spray oil after each use and/or before autoclaving. Remove the handpiece from the dental unit tube and lubricate as follows (Fig. 3):

1. Attach a spray nozzle to the lubricant outlet.
2. Remove the test burr from the cartridge, then point the single spray nozzle at the cartridge chuck.
3. Spray for 1-2 seconds.

NOTICE: Keep the spray can in an upright position.

STERILIZATION

Autoclave sterilization is recommended. HASH
Autoclave sterilization is required after each patient as follows.

AUTOCLAVE:

1. Brush off excess dirt and wipe with an alcohol-soaked cloth.
2. Remove the handpiece from the dental unit tube and lubricate with spray oil or other standard oil as described under 5. Lubrication.
3. Insert the handpiece into a sterilization bag and seal it.
4. The sterilization of the drill key is the same as that of the handpiece.
5. Sterilize up to a maximum of 134°C, Symbol Sterilization .Do not set the sterilization temperature higher than 134°C.
6. Please dry the handpiece by 134 ºC dryer (15 minutes) after high temperature sterilization and disinfection.
7. The product should be high temperature sterilized and used on site.
8. The handpiece is resistant to at least 250 times of high temperature sterilization and disinfection.

PREPARATION:

1. Brush off excess dirt and wipe with a cloth soaked in alcohol.
2. Remove the handpiece from the dental unit tube and lubricate spray lubricant or other spray oil as described in the Lubrication section.
3. Place the handpiece in a sterilization pouch and seal it.
4. Sterilize up to a maximum of 134 °C.

CAUTION
The heating element may be located at the bottom of the chamber, and the temperature may exceed the set value. To prevent this, place the handpiece in the center or top tray.

Do not autoclave the handpiece, even if it is bagged, together with other instruments, from which the chemicals are not sufficiently clean. This is to avoid discoloration and/or damage to the plating of the handpiece.

REPLACING CARTRIDGE

Disassembling the cartridge

• Mount a test drill in the chuck.

• Place the key in the head cap, turn the key counterclockwise and remove the cap.

• Push up the test burr and the cartridge is easily removed from the spindle.

• Clean the inside of the head, when dirty, with MAINTAIN series spray oil.
  Inserting the new cartridge

• Place the new cartridge in the rear cap, then insert the cartridge with the cap into the handpiece head.

• Screw the rear cap securely onto the handpiece head, then use the cap wrench to make sure the cap is

CAUTION
The head screw thread is very fine. To avoid breakage, the use of the first thread wrench is not recommended. Before inserting a new cartridge, clean the inside of the head.

TECHNICAL PARAMETERS

The speed may vary slightly depending on the configuration of the backend and the type of hose used.

INFORMATION

The technical specifications, illustrations and dimensions contained in these instructions are given for information purposes only.

Version date: 20190522
Production date: see the label
product function: see the instruction manual parameter
Product validity period: in 5 years from production date

GENERAL DESCRIPTION

Can be used for various dental clinical treatment and prevention.
Can be connected to various E type handpiece that meet the ISO3964 standard.
Sterilized by autoclave and chemistry.
Complete set weight: Approx.600g.
It is composed of air motor, straight head and contra angle.
Rose 202 series should be professionally used by dentists as cutting tools for drilling or gripping teeth

CAUTIONS
Prior to each to each use, all instruments and accessories must be inspected or proper operation.
When using the handpiece, protect the patient at all time.
Before each use, be sure that bur is completely seated and locked in the instrument.
Only use burs from reputable manufacturers with a shaft diameter of 2.348mm~2.350mm, and a max. total length of type 1: 22.6mm; type 2: 44.6mm; and type 3: 19.1mm.
After extended use, the handpiece may become noisy, replace the cartridge. Failure to replace the cartridge may cause accidents or impair operator” s hearing.
The NEXO handpieces should not be rebuilt. Replacing bearings only could result in unexpected failure and patient injury due to different factors of new vs. old components.

Do not extend burs outward from handpiece head. Burs must be inserted all the way into chuck for proper bur retention. Extended burs could result in bent burs, inadequate cooling or personal injury due to bur ejection.
End of product life, the metal can be handled by separation and recycling disposal.
Products storage and transportation should be carried out in environment with the following features: dry, stable (no collision), clean, nor-mal temperature, normal pressure, away from acid gasses and other harmful chemical substances, and humidity should be less than 90%. Maintenance should be made by professionals.
The recycle of this product shall be according to the demand of local relative laws.
Haemophiliac should be caution to use it.
Heart pacemaker patient or doctor should be caution to use it.
Heart disease patient, pregnant woman and baby should be caution to use it.

TECHNICAL PARAMETER

1. Internal water air motor
2. Straight handpiece
3. Contraangle handpiece

ASSEMBLE AND DISASSEMBLE

Assemble
Insert the E-type handpiece in the motor insert until hear the sound of spring insert to the groove. (Fig.1)

Before each treatment check by pulling if contra angle or straight handpiece

Disassemble
Simply pull out the handpiece from the motor. (Fig.2)

Do not fit or remove the contra angle or straight handpiece during rotation,to prevent the handpiece.

UNLOAD THE BUR

Straight handpiece:
(1) When inserting the bur, rotate bur lock ring to the bottom position in the direction of the white arrow and pull out the test bur (shown as fig. 3),open the bur lock and take the test bur out of the straight handpiece.
Insert an standard bur into the chuck of the handpiece, and make sure the bur reach the bottom of the chuck.
(2) Relock the bur lock by rotating the bur lock ring to the bottom position in the direction of the black arrow (shown as fig. 3) and check whether the bur is lock tightly by pulling the bur. When unloading the bur, rotate bur lock ring the bottom position in the direction of the white arrow and pull out the standard bur(shown as fig. 3).
CAUTION Do not lock the chuck tightly without inserting a bur, it may damage the chuck.

Contra angle handpiece:

1. When inserting the bur, put the bur into the inner bore of the cartridge (about 1-2mm), then push the back cap slowly and carefully with another thumb, meanwhile, insert the bur into the inner bore by rotating the bur, until it clicks when the bur reaches the groov of the back cap. Then release the back cap and check whether the bur is lock tightly by pulling the bur.
2. When unloading the bur, push the back cap with one thumb and take out the bur.

CAUTION

1. Only standard bur accords with ISO 1797-1 can be used on all of our straight handpieces and contra angles.
2. The bur must be clean before being inserted into the handpieces, in order to avoid any gungo and dirt goes into the handpieces with the bur.
3. Any bend/ nonconcentricity/damaged bur is forbidden.
4. The bur lock ring shall not be rotated when the straight handpiece is working, while the back cap shall not be pushed when the contra angle is working, all these operation may cause the bur goes out of the handpiece. And do not touch the rotating bur when the handpie-ce is working

CHANGE CARTRIDGE IN CONTRA ANGLE HANDPIECE

CAUTION
Change the cartridge in contra angle shall be the professional afterservice maintain person approved by our company the other customer shall not do this in case damage products.

1. Unload the old cartridge
   • a. According to the Fig 5, screw the lock sleeve on the contra angle as the direction arrow until it ca not move, put out the contra angle head.
   • b. According to the Fig 6, use the screwdriver to screw out the serew in counter-clockwise on the bank of the contra angle back,and su out the spindle.
   • c. Put the bur inside the cartridge, use the banner in the handpiece package to unload the back cap with counter-clockwise direction until take out the back cap. Push the bur by hand softly and take out the cartridge. Fig 7
2. Fit the new cartridge
   Put cartridge inside the contra angle head the bottom and screw the back cap with clockwise direction and screw the back cap firmly. Fig 8

CAUTION

1. The screw thread on the back cap is very small, when begin fix the back cap shall not use the banner in case to demange the screw thread.
2. When use the handpiece for long and face the noisy situation, please check the same new cartridge.It will case accident or demange the patients” audition if don’t change the cartridge on time.

FORWARD/REVERSE ROTATION

1. Forward Rotation: Turn the FWD/REV Change Ring to “F” as shown in Fig. 9.
2. Reverse Rotation: Turn the FWD/REV Change Ring to “R” as shown in Fig. 10.
3. When the FWD/REV Change Ring is positioned in the middle of “F”and “R”, the drive air is interrupted and the motor does not rotate. (Fig.11)
4. Highest rotation speed occurs when the FWD/REV Change Ring is positioned in the top of “F” or “R”

CAUTION connecting motor and dental unit’s tubing should conform to 1S09168:2009 (E)

CLEAN ROTATION

Handpiece shall be cleaned and sterilized after each using.

1. Get off the handpiece from the airmotor,and unload the diamond bur.
2. Use banister brush to clean the handpiece and diamond bur,and use gauze or tampon with alcohol to clean and sterilize the handpie-ces and airmotor.
3. Use gauze and tissue to clean the handpieces and airmotor by brush up and down.

CAUTION Do not put the handpieces,airmotor into the ultrasonic sterilizer or water to clean.

CARE AND MAINTAIN INSTRUCTION

1. Airmotor
   Take the handpiece from the airmotor, shown in Fig 8 the air insert hole. Insert oilspray or the turbine lubricant. Clean and lubricant at least 1 time each day. Using the lubricant 1-2 drop each time. Using the oilspray, spray 1-2 second each time.

2. Straight handpiece
   The straight handpiece can be brushed clean under running water,or cleaned the outside with an alcohol solution. Take the straight handpiece from the airmotor, put out the burs and put the stick in the handpiece like Fig 13. Insert the turbine lubricant or the clean, lubricant one time each day ,using the turbine lubricant 1-2 drop
   CAUTION
   Do not place the straight handpiece in an ultrasonic cleaner since this may result in malfunction.

3. Contra angle handpiece

4. Handle part
   Screw the clasp on the straight handpiece until it cannot move, and take out the head of the contra angle handpiece. Insert the turbine lubricant or Maintain 300m1/500ml in the hole as Fig 14 shown. lubricant one time each day, using the turbine lubricant 1-2 drop

5. Contra angle head part
   Screw the clasp on the straight handpiece until it cannot move, and take out the head of the contra angle handpiece. Insert the turbine lubricant in the hole as Fig 15 shown. Lubricant one time each day, using the turbine lubricant 1-2 drop.

CAUTION
Improper maintenance and care can lead to premature wear and malfunction. We recommend using original NEXO care products

STERILIZATION

1. Suitable for both steam. Autoclaving procedure:
2. 3. Wipe off dirt with alcohol-soaked cloth according to the manual item 7 and item 8.
3. Lubricate with SPRAY. Operate the handpiece for a few seconds after lubrication with Air Turbine Oil (Ref. 6. LUBRICATION).
4. Place into autoclaving pouch and seal it in accordance with instructions on the pouch,
5. Autoclave the handpiece for 20 min. at 120ºC, or 15 min, at 135ºC.
6. Please dry the handpiece by dryer for 134ºC (15minutes) after high temperature sterilization and disinfection.
7. The product should be sterilized at high temperature and used on site.
8. Handpiece is resistant to at least 250 times of high temperature sterilization and disinfection.

WARRANTY AND EARRERE

Warrants the handpieces against poor manufacturing, poor workmanship or defects in materials, warranty period 1 year.
Reserves the right to analyze and determine the causes of any problem.
Also takes charges of repairing those handpieces with problems caused by any incorrect use or maintenance, but expenses should be beared by the user.
Should the handpiece function abnormally, cease operation immediately.
Contact to the local dealers or to if any abnormality occurs.

INFORMATION

The technical specifications, illustrations and dimension contained in these instructions are given only as a guide. They may not be the subject of any claim. The manufacturer reserves the right to make technical improvement to its equipment without a amending these instructions.

MODELS

Version date: 20190522
Production date: see the label
Product function: see the instruction manual parameter
Product validity period: in 5 years from production date

Being Foshan Medical Equipment Co., Ltd
No. 9, North Park East Road, Shishan Town, Nanhai District, 528225 Foshan,Guangdong, China

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