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Product Description
The Increasing Speed 1:5 Contra Angle (Model J20) is a high-performance dental handpiece designed for restorative, prosthetic, and general dental procedures requiring precision, efficiency, and operator comfort. Featuring a 1:5 speed-increasing transmission ratio, the handpiece delivers smooth and powerful cutting performance while maintaining excellent control and stability.
The J20 Contra Angle is suitable for crown and bridge preparation, cavity preparation, restoration finishing, removal of fillings, removal of carious tissue, and various restorative procedures. The integrated fiber optic illumination system provides excellent visibility of the treatment area, enhancing precision and clinical outcomes.
Equipped with an advanced push-button bur locking mechanism, the handpiece allows quick and secure bur changes while minimizing the risk of bur displacement during operation. The high-precision gear system and imported stainless steel spring structure provide exceptional clamping force, smooth operation, and long-term durability.
The internal water spray system delivers efficient cooling of the bur and treatment site, helping to reduce heat generation and improve patient comfort during procedures.
Advantages
- 1:5 speed-increasing transmission ratio.
- High-performance cutting efficiency.
- Integrated fiber optic illumination for enhanced visibility.
- Advanced push-button bur locking system.
- Quick and safe bur replacement.
- High clamping force for secure bur retention.
- Low vibration and low noise operation.
- Precision gear mechanism for smooth performance.
- Internal water spray cooling system.
- Ergonomic and lightweight design.
- High-quality stainless steel construction.
- Compatible with ISO standard connections.
Technical Specifications
- Model: J20
- Transmission Ratio: 1:5 Increasing Speed
- Maximum Rotation Speed: 20,000 RPM Input
- Air Pressure: 0.15 MPa – 0.25 MPa
- Noise Level: ≤ 60 dB
- Applicable Bur Diameter: Ø1.595 mm – Ø1.598 mm
- Cooling System: Internal Water Spray
- Bur Retention: Push Button Chuck
- Water Flow Rate: ≤ 50 ml/min
- Bearing Type: Steel Bearing
- Clamping Force:
- Static ≥ 18 N
- Dynamic ≥ 40 N
- Light Source: Fiber Optic
- Connection Type: ISO Standard
Indications
- Crown preparation.
- Bridge preparation.
- Tooth preparation.
- Cavity preparation.
- Restoration finishing and polishing.
- Removal of restorative materials.
- Removal of fillings.
- Removal of carious tissue.
- Prosthetic procedures.
- General restorative dentistry.
Features
1. Push-Button Chuck System
The advanced push-button mechanism enables rapid bur changes while providing secure bur retention during operation. The system is designed to withstand approximately 300,000 activation cycles.
2. Fiber Optic Illumination
Integrated fiber optic technology provides bright, shadow-free illumination directly at the treatment site, improving visibility and precision.
3. Low Vibration and Noise
The precision gear structure and high-quality bearings minimize vibration and operating noise, enhancing clinician comfort and patient experience.
4. Internal Water Spray
The internal spray system delivers effective cooling of the bur and treatment area, reducing heat generation during cutting procedures.
Sterilization
- The handpiece must be cleaned, lubricated, and sterilized before first use and after each patient.
- Recommended Sterilization: Autoclave sterilization at 135°C (274°F)
- Follow the manufacturer's maintenance and lubrication procedures before sterilization.
Storage
Store in a clean, dry environment protected from moisture, dust, direct sunlight, and mechanical damage.
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Increasing Speed 1:5 Contra Angle - Model J20
Intended Use
The Increasing Speed 1:5 Contra Angle (Model J20) is intended for use in restorative, prosthetic, and general dental procedures requiring high-speed rotary instrumentation. The handpiece is designed for tooth preparation, cavity preparation, crown and bridge preparation, finishing and polishing restorations, removal of fillings, and removal of carious tissue.
The instrument is intended for use by qualified dental professionals only.
Indications
- Crown preparation.
- Bridge preparation.
- Tooth preparation.
- Cavity preparation.
- Removal of carious tissue.
- Removal of composite and amalgam restorations.
- Finishing and polishing restorative materials.
- Prosthetic and restorative dental procedures.
Contraindications
Do not use:
- For surgical implant osteotomy preparation.
- For procedures requiring non-compatible burs.
- If the handpiece is damaged or malfunctioning.
- Without adequate water cooling during cutting procedures.
Warnings
- Use only compatible burs with a diameter of Ø1.595 mm – Ø1.598 mm.
- Always verify secure bur fixation before operation.
- Operate only with sufficient cooling water.
- Excessive force during cutting may damage the handpiece or bur.
- Do not operate a damaged handpiece.
- Use appropriate personal protective equipment during treatment.
Precautions
- Inspect the handpiece before each use.
- Ensure proper connection to the dental unit.
- Maintain adequate water flow throughout operation.
- Never press the push button while the bur is rotating.
- Sterilize the handpiece before first use and after each patient.
- Follow routine maintenance and lubrication procedures.
Instructions for Use
Preparation Before Use
1. Inspect the handpiece for visible damage or wear.
2. Verify that the bur chuck operates correctly.
3. Confirm that water and light connections are functioning properly.
4. Sterilize the handpiece before use.
Connecting the Handpiece
1. Connect the contra angle to a compatible ISO standard motor.
2. Ensure the connection is fully seated and secure.
3. Verify operation of the fiber optic illumination system.
4. Check water spray functionality before treatment.
Bur Installation
1. Press the push-button chuck.
2. Insert a compatible bur completely into the chuck.
3. Release the push button.
4. Gently pull the bur to verify secure retention.
5. Never use a bur that is bent, damaged, or worn.
Clinical Operation
1. Activate the handpiece according to the dental unit instructions.
2. Ensure continuous water spray during cutting procedures.
3. Use light, controlled pressure while preparing teeth or restorations.
4. Avoid excessive force that may overload the handpiece.
5. Monitor bur condition throughout the procedure.
Bur Removal
1. Wait until the bur has completely stopped rotating.
2. Press the push-button chuck.
3. Remove the bur carefully.
4. Release the push button.
Cleaning and Maintenance
- Remove the bur.
- Flush water lines according to the dental unit protocol.
- Clean external surfaces using approved cleaning agents.
- Remove visible debris, blood, and contaminants.
- Lubricate the handpiece according to the manufacturer's recommendations.
Sterilization
- The handpiece must be cleaned and lubricated before sterilization.
- Recommended Sterilization: Steam autoclave at 135°C (274°F)
After sterilization:
- Allow the handpiece to cool completely.
- Inspect for proper operation before use.
- Verify smooth rotation and water spray function.
Maintenance
- Regularly inspect bearings, chuck mechanism, and fiber optic system.
- Replace worn or damaged burs immediately.
- Perform routine lubrication according to maintenance schedules.
- Do not disassemble the handpiece unless authorized by the manufacturer.
Storage
Store the handpiece in a clean, dry environment protected from moisture, dust, direct sunlight, and mechanical damage.
Always store the handpiece after cleaning, lubrication, and sterilization.
