COXO CX235 Series Contra Angle Operation Manual

MODEL: CX235

Professional Dental Manufacturer: COXO

Distributed by: DentalDeal

Please read this operation Manual carefully and file for future reference.

Preface

Thanks for purchasing the COXO dental Contra angle. To fully exert the function of this equipment safely and effectively, please read this instruction carefully before using and keep this manual for reference anytime. Under regulations' request, COXO has committed to the optimization of its products. This may cause some parts of change; when you find the product appears some difference from the description in the manual, please contact the dealers or COXO's after-sales center for details.

Technical Specifications

• Protection of liquids: normal liquids - protected equipment
• Temperatures range: -40°C to +135°C
• Relative humidity: 10% to 80%, non-condensing
• Noise: ≤70dB

Website: www.dentaldeal.ca

WARNING

• Please read this operation manual carefully before use and file it for future reference.
• This product is specialized for stomatology treatment; do not use it in other ways.
• This product is only for doctors.
• Every time you use it, please check first. If you find anything abnormal, stop using immediately and contact your supplier or COXO's after-sales center for details.
• Before operating a low-speed handpiece, pull the contra angle handpiece with hand to make sure the handpiece connects firmly and safely.
• The head cannot run without an insert bur; otherwise, the head or motor would be damaged.
• Ensure working pressure before running. Air pressure for a four-hole air motor is 0.3Mpa; for a two-hole air motor is 0.25Mpa.
• Do not immerse the handpiece in any chemical solvent or solution or use dry-heat disinfection. Sterilization by autoclave at (135±2)°C & 0.22MPa is suggested.

Product Composition: Inner Channel 1:1

Diagrams illustrating different contra angle models:

• Contra angle (CX235-1B): Features a push button, optic fiber, bur diameter Φ2.35, and 1:1 ratio.
• Optic fiber contra angle (CX235-1C): Features a push button, optic fiber, bur diameter Φ2.35, and 1:1 ratio.
• LED contra angle with generator (CX235-1E): Features a push button, optic fiber, internal generator, bur diameter Φ2.35, and 1:1 ratio.
• Contra angle (CX235-1G): Features a push button and internal channel, 1:1 ratio.

Cartridge Replacement (Locking Pin)

1. Loosen the small screw on the curving part, move the head cover, and remove the transmission gear [See Fig. 2.1].
2. Use the attached wrench to remove the cap [See Fig. 2.2].
3. Use the bur to push out the cartridge.
4. Insert the new cartridge into the handpiece head, ensuring the small raised part aligns with the groove inside the front of the head for proper fit.

Fig. 2.1: Illustration of loosening a screw on a handpiece with a screwdriver.

Fig. 2.2: Illustration of removing a cap from a handpiece with a wrench.

Fig. 2.3: Illustration of pushing out a cartridge with a bur.

Fig. 2.4: Illustration of inserting a new cartridge into a handpiece head, aligning a pin with a groove.

Contra Angle and Motor Connections

1. Straightly insert the motor into the connection of the contra angle until you hear a "cracking" sound.
2. Hold the bending machine and pull out the motor; it will be separated [See Fig. 3.2].
3. Align the groove; the contra angle can be inserted into the air motor [See Fig. 3.3].

Fig. 3.1: Shows a Contra angle with generator (CX235-1E) connecting to an Air motor (CX235-3B) with 1:1 drive.

Fig. 3.2: Shows a Contra angle (CX235-1B) connecting to an Air motor (CX235-3B) with 1:1 drive.

Fig. 3.3: Shows an Optic Fiber Contra angle (CX235-1C) connecting to an Optic Fiber/LED Air motor (CX235-3C/CX235-3D) with 1:1 drive.

Fig. 3.4: Close-up illustration of an optic fiber.

Contra Angle Head Technical Parameters

Fig. 1.1, 1.2, 1.3: Illustrations of "360° reciprocating rotate head" movement.

Fig. 1.4: Illustration showing a handpiece head with a bur, indicating a length of 10.7mm.

Special Head Movement Technical Parameters

Fig. 1.5: Illustration of "90° reciprocating rotate head" movement.

Fig. 1.6: Illustration of "Up and down movement".

Fig. 1.7: Illustration of "60° reciprocating rotate head" movement.

Fig. 1.8, 1.9: Illustrations showing internal and external spray nozzles with irrigation tubes and water outlets.

Product Composition: 1:1 Direct Drive

Diagrams illustrating various 1:1 direct drive contra angle models:

• CX235C1-2: For CA burs Φ2.35. Features a latch plate and push button.
• CX235C1-4: For CA burs Φ2.35. Features a latch plate and push button.
• CX235C1-7: For FG burs Φ1.6. Features a latch plate and push button.
• CX235C1-13: For CA burs Φ2.35. Features a latch plate and push button.
• CX235-1F: For CA burs Φ2.35. Features a latch plate.

Fig. 2.1 to 2.5: Visual representations of the aforementioned models.

Fig. 3.1: Shows dimensions Φ2.35 and Φ19.6 for a handpiece.

Fig. 3.2: Shows dimensions Φ1.6 and Φ19.6 for a handpiece.

External contra angle low speed handpiece: 1:1 Direct Drive.

Burs: For CA burs Φ2.35; for FG burs Φ1.6.

Series: CX235C1 Series; CX235C2 Series.

Mounting of Bur (Locking Pin)

1. Open the latch chuck, insert the bur, ensuring the quadrate part of the bur aligns with the proper part in the cartridge, then turn the latch chuck back.
2. When removing the bur, open the latch chuck, then take out the bur.

Fig. 3.3: Illustration of inserting a bur using a locking pin mechanism.

Mounting of Bur (Push Button)

The fixed method of internal contra low speed handpiece is push button. Push the button to the end, and then the bur can be ejected from the head.

Fig. 3.4: Illustration of inserting a bur using a push button mechanism.

Product Composition: 1:1 Direct Drive (Continued)

Diagrams illustrating various 1:1 direct drive contra angle models:

• CX235C2-1: For CA burs Φ2.35. Features a latch plate and push button.
• CX235C2-3: For CA burs Φ2.35. Features a latch plate and push button.
• CX235C2-6: For FG burs Φ1.6. Features a latch plate and push button.
• CX235C2-13: For CA burs Φ2.35. Features a latch plate and push button.

Fig. 2.6 to 2.8: Visual representations of the aforementioned models.

Fig. 3.1: Shows dimensions Φ2.35 and Φ19.6 for a handpiece.

Fig. 3.2: Shows dimensions Φ1.6 and Φ19.6 for a handpiece.

Mounting of Bur (Locking Pin)

1. Open the latch chuck, insert the bur, be sure the quadrate part of the bur aligns the proper part in the cartridge, then turn the latch chuck back.
2. When remove the bur, open the latch chuck, then take out the bur.

Fig. 9.1: Illustration of inserting a bur using a locking pin mechanism.

Fig. 9.2: Illustration of inserting a bur using a push button mechanism.

Fig. 9.3: Illustration of inserting a bur using a push button mechanism.

Fig. 9.4: Illustration of inserting a bur using a push button mechanism.

Fig. 9.5: Illustration of inserting a bur using a push button mechanism.

Product Composition: 4:1 Reduction

Diagrams illustrating various 4:1 reduction contra angle models:

• CX235C3-1: Features a latch plate and push button.
• CX235C3-4: Features a latch plate and push button.
• CX235C3-8: Features a latch plate and push button, with "Prophylaxis" label.
• CX235C3-13: Features a "mini head" and latch plate.
• CX235C3-10: Features a latch plate, push button, and "90° reciprocation up and down rotate movement".
• CX235C3-11: Features a latch plate and push button.

All models are labeled with "4:1 reduction".

Fig. 4.1 to 4.6: Visual representations of the aforementioned models.

Mounting of Bur (Locking Pin)

1. Open the latch chuck, insert the bur, be sure the quadrate part of the bur aligns the proper part in the cartridge, then turn the latch chuck back.
2. When remove the bur, open the latch chuck, then take out the bur.

Fig. 5.1: Illustration of inserting a bur using a locking pin mechanism.

Mounting of Bur (Push Button)

The fixed method of internal contra low speed handpiece is push button. Push the button to the end, and then the bur can be ejected from the head.

Fig. 5.2: Illustration of inserting a bur using a push button mechanism.

Fig. 5.3: Illustration of inserting a bur using a push button mechanism.

Fig. 5.4: Illustration of inserting a bur using a push button mechanism.

3. Prophylaxis

Mounting and Removing the Rubber Cup/Brush

Mounting

1. Insert the rubber cup/brush into a screw hole of the handpiece head.
2. Turn the rubber cup/brush in a clockwise direction to fix the screw shank.

Removing

Perform a reverse procedure of Mounting. Turn the Rubber cup/brush in the "Loosen" direction.

Fig. 6.1: Illustration of mounting a rubber cup/brush onto a handpiece head.

Fig. 6.2: Illustration of a mounted rubber cup/brush.

Product Composition: 10:1 Reduction

CX235C5-12: Features a "push button", "hand use file", and "10:1 reduction hand".

Fig. 7: Visual representation of the CX235C5-12 model.

Mounting and Removing File

⚠️ NOTE:

1. Do not connect or disconnect the handpiece until the drive motor has completely stopped.
2. After the file is locked in place, lightly pull out the file to make sure the file is locked.

Fig. 7.1: Illustration of inserting hand use files into a handpiece with a push button mechanism.

Product Composition: 16:1 Reduction

Diagrams illustrating various 16:1 reduction contra angle models:

• CX235C4-2: Features a latch plate and push button.
• CX235C4-4: Features a latch plate, push button, and "External spray nozzle".
• CX235C4-9: Features a latch plate and push button.
• CX235C4-14: Features a latch plate and push button.
• CX235C4-13: Features a "mini head" and latch plate.
• CX235C4-10: Features a latch plate, push button, and "90° reciprocation rotate".
• CX235C4-11: Features a latch plate and push button, with "up and down movement".

All models are labeled with "16:1 reduction".

Fig. 8.1 to 8.8: Visual representations of the aforementioned models.

Mounting of Bur (Locking Pin)

1. Open the latch chuck, insert the bur, be sure the quadrate part of the bur aligns the proper part in the cartridge, then turn the latch chuck back.
2. When remove the bur, open the latch chuck, then take out the bur.

Fig. 9.1: Illustration of inserting a bur using a locking pin mechanism.

Mounting of Bur (Push Button)

The fixed method of internal contra low speed handpiece is push button. Push the button to the end, and then the bur can be ejected from the head.

Fig. 9.2: Illustration of inserting a bur using a push button mechanism.

Fig. 9.3: Illustration of inserting a bur using a push button mechanism.

Fig. 9.4: Illustration of inserting a bur using a push button mechanism.

Fig. 9.5: Illustration of inserting a bur using a push button mechanism.

Product Composition: 20:1 Reduction

Diagrams illustrating various 20:1 reduction contra angle models:

• CX235C6-9: Features "External spray nozzle" and a latch plate.
• CX235C6-14: Features a "push button" and a latch plate.
• CX235C6-13: Features a "MINI head" and a latch plate.
• CX235C6-19: Features "External spray nozzle" and a latch plate.

All models are labeled with "20:1 reduction".

Fig. 10.1 to 10.4: Visual representations of the aforementioned models.

Mounting and Removing Bur (Locking Pin)

Locking pin

1. Open the latch chuck, insert the bur, be sure the quadrate part of the bur aligns the proper part in the cartridge, then turn the latch chuck back.
2. When remove the bur, open the latch chuck, then take out the bur.

⚠️ NOTE:

1. Do not connect or disconnect the handpiece until the drive motor has completely stopped.
2. After the file is locked in place, lightly pull out the bur to make sure the bur is locked.

Fig. 11.1: Illustration of inserting a bur using a locking pin mechanism.

Fig. 11.2: Illustration of inserting a bur using a locking pin mechanism.

Fig. 11.3: Illustration of inserting a bur using a push button mechanism.

Mounting the "Y" type water tube

Three irrigation methods are available: External, Internal, or both External and Internal, depending on the tool and operation procedure.

(1) External Spray Nozzle

Connect the Irrigation Tube to the External Spray Nozzle firmly.

Fig. 12.1: Illustration showing connection of irrigation tube to an external spray nozzle.

(2) Internal Spray Nozzle

Only a drill with internal irrigation is used.

1. Connect the Irrigation Tube to the Internal Spray Nozzle firmly.
2. Put the Internal Spray Nozzle into the slot on the head.

Fig. 12.2: Illustration showing connection of irrigation tube to an internal spray nozzle.

Fig. 12.3: Illustration showing connection of irrigation tube to an internal spray nozzle.

(3) External and Internal Irrigation together (locking pin)

Only a drill with internal irrigation is used.

1. Connect the ends of the Y-Connector to the External Spray Nozzle and Internal Spray Nozzles as detailed in procedures (1) and (2).
2. Connect the Irrigation Tube to the Y-Connector firmly.

Fig. 12.4: Illustration showing connection of a "Y" Connector and irrigation tube to external and internal spray nozzles.

(4) External and Internal Irrigation together (push button)

Only a drill with internal irrigation is used.

1. Connect the ends of the Y-Connector to the External Spray Nozzle and Internal Spray Nozzles as detailed in procedures (1) and (2).
2. Connect the Irrigation Tube to the Y-Connector firmly.

Fig. 12.5 to 12.7: Illustrations showing connection of irrigation tube and "Y" Connector for push button type.

Fig. 12.8: Illustration showing a handpiece with connected irrigation tubes and Y-connector.

Cartridge Replacement (Locking Pin)

1. Loosen the curving lock section and remove the head from the sheath.
2. Pull out the drive gear assembly from the head [See Fig. 13.1].
3. Cap the wrench on the head's screw and turn counter-clockwise. Unscrew and separate the cover [See Fig. 13.2].
4. Swing the new cartridge, with its pin aligned in the groove of the head.
5. Reassemble in the reverse order.

Fig. 13.1: Illustration of removing the drive gear assembly.

Fig. 13.2: Illustration of unscrewing a cover with a wrench.

Fig. 13.3: Illustration of a cartridge with a pin and slit.

Fig. 13.4: Illustration of removing a cartridge.

1.2. Removal of the cartridge (CX235CH-11)

1. Loosen the curving lock section and remove the head from the sheath.
2. Pull out the drive gear assembly from the head [See Fig. 14.1].
3. Directly remove the cartridge [See Fig. 14.4].

Fig. 14.1: Illustration of removing the drive gear assembly.

Fig. 14.2: Illustration of a screwdriver being used.

Fig. 14.3: Illustration of a cartridge with a slit.

Fig. 14.4: Illustration of direct cartridge removal.

Fig. 14.5, 14.6: Illustrations showing different handpiece models for cartridge removal.

2. Push button Cartridge Replacement

1. Loosen the small screw on the curving part, move the head cover, and remove the transmission gear [See Fig. 15.1].
2. Use the attached wrench to remove the cap [See Fig. 15.2].
3. Use the bur to push out the cartridge.
4. Insert the new cartridge into the handpiece head, ensuring the small raised part aligns with the groove inside the front of the head for proper fit.

Fig. 15.1: Illustration of loosening a screw and removing a head cover.

Fig. 15.2: Illustration of removing a cap with a wrench.

Fig. 15.3: Illustration of a cap being removed.

Fig. 15.4: Illustration of inserting a new cartridge.

Contra Angle and Motor Connections

1. Straightly insert the motor into the connection of the contra angle until you hear a "cracking" sound.
2. Hold the bending machine and pull out the motor; it will be separated.

Fig. 16.1: Illustration showing separation of a handpiece from a motor.

Fig. 16.2: Illustration showing connection of a handpiece to a motor.

Lubrication

After daily use, spray lubricant for 1 to 2 seconds by inserting the lubricant nozzle all the way into the drive air tube.

If work is heavy, lubrication should be implemented at noon and afternoon after using every day.

Lubricate the head, gear, and inside [See Fig. 16.3]. When lubricating the head, please open the latch chuck.

• Dismount contra handpiece from motor.
• Install E spray nozzle on the lubricant.
• Insert E spray nozzle on the back of the contra handpiece to spray for 2-3 seconds until the lubricant flows out of the head. Stop when clean lubrication comes out.
• Keep the contra handpiece standing for a while, and then connect with the motor after the lubricant inside has come out.

Fig. 16.3: Illustration showing lubricant being sprayed into the drive air tube.

Caution

• Be sure to hold the handpiece firmly to prevent the handpiece from slipping out by the spray pressure when lubricating.
• Supply lubricant until it comes out of the handpiece nose (for approx 2 seconds).
• Keep the SPRAY can upright.

Fig. 18: Illustration showing lubricant being sprayed from a can into a handpiece using an E spray nozzle.

Clean-head system

1. Scrub dirt and debris from the handpiece.
2. Stop the handpiece and wipe it dry. If the dirt cannot be removed from the hole, remove the cartridge and clean by brush.

Fig. 17: Illustration showing cleaning a handpiece head with a brush.

⚠️ Notice! Use only clean water to maintain the clean head system.

Cleaning-bulb

Wipe clean the Cellular optical bulb entry point with an alcohol-immersed cotton swab. Remove all debris and oil.

Sterilization and Cleaning

• Steam autoclave is recommended.
• Sterilization requirement after using as noted below.
• Autoclave Procedure:
• Scrub dirt and debris from the handpiece, and wipe clean with alcoholic cotton. Do not use a wire brush [See Fig. 18.4].
• Lubricate with SPRAY or Lubricant oil.
• Lubrication.
• Insert into an autoclave pouch. Seal the pouch.
• Autoclavable up to a max. 135°C (EX.). Autoclave for 20 min. at 121°C or 15 min. at 132°C [See Fig. 18.2/18.3].

Fig. 18.2: Illustration showing a handpiece in an autoclave pouch with "135°C SSS" symbol.

Fig. 18.3: Illustrations showing heat sterilization of tubing contra angles at 135°C.

⚠️ NOTE: After treatment or before autoclave, please do the lubrication.

Fig. 18.4: Illustration showing cleaning a handpiece under running water with a brush.

Fig. 18.5: Illustration showing lubricant being sprayed onto a handpiece.

Fig. 18.6: Illustration showing a handpiece in a beaker with a cross symbol (indicating not to immerse).

Fig. 18.7: Illustration showing a handpiece in a "STERILE" pouch.

Fig. 18.8: Illustration showing temperature and pressure symbols (135°C, 275° F).

Trouble Shooting

COXO's service center can offer technical assistance to you.

Warranty

COXO grants the user a 12 months guarantee for its complete product range, except ball bearing (3 months guarantee) from the date of invoice issued. Maintenance over the term of guarantee will be at the customer's charge. COXO will not be responsible for damage or injury resulting from:

• Excessive use
• Improper manipulation of the product, or modification to product carried out by persons not authorized by COXO.
• Failure to follow the instruction to install, operate, and maintenance the handpiece.
• Damage of chemical, electrical, or electrolysis due to improper autoclaving and storing.
• Improper working pressure.

The technical specifications and dimensions in these instructions are given only as a guide. They may not be subject to any claim.

Standard Symbols

On the instrument label appear standard symbols as follows:

• ⚠️ Important notice!
• ?️‍⚗️ Autoclave (135°C SSS symbol)
• ℹ️ Attention, consult accompanying documents
• □ Class II equipment
• ?‍⚕️ Type B applied part
• CE Certified to MDD93/42/EEC
• ? Manufacturer

Transportation and deposited condition

Environmental temperature range: -40°C to +50°C; Relative humidity ≤80%; The scope of air pressure: 500hPa to 1060hPa.

Symbols indicate:

• Protection from rain (umbrella symbol).
• Fragile (broken glass symbol).
• Temperature range: +40°C/+40°F to +70°C/158°F.
• Humidity range: 10% min. to 80% max.
• Air pressure range: 50 kPa to 106 kPa.

Website: www.dentaldeal.ca