Description

JOSOI Leaf Pattern Large-Head Key-Type High-Speed Handpiece

• Brand: JOSOI — professional high-speed dental handpiece for routine clinical use
• Large-head design for stable turbine operation and efficient cutting performance
• Diamond / leaf-pattern exterior for improved grip recognition and a professional appearance
• Single-point water spray cooling system for focused cooling during high-speed cutting
• Internal water channel cooling design for stable water supply to the cutting area
• Metal body structure for durability and repeated clinical sterilization
• Key-type bur removal design for secure bur fixation and replacement
• Available with 2-hole and 4-hole connection interfaces
• 320,000–350,000 RPM high-speed turbine performance
• Low operating noise level of ≤60 dB
• Compatible with Φ1.595–1.600 mm standard dental burs
• Supports 135°C high-temperature autoclave sterilization

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Description

The JOSOI Leaf Pattern Large-Head Key-Type High-Speed Handpiece is designed for dental professionals who require stable high-speed cutting performance, reliable cooling, durable construction, and secure bur fixation during daily clinical procedures.

This model features a large-head turbine structure, diamond-style leaf pattern exterior, single-point water spray cooling system, internal water channel cooling, metal body, and key-type bur removal design. The large-head structure supports stable turbine rotation and efficient cutting performance, making the handpiece suitable for cavity preparation, crown reduction, restorative adjustment, occlusal refinement, and other routine high-speed dental procedures.

The single-point water spray system provides focused cooling toward the bur and cutting zone. Combined with the internal water channel supply, it helps reduce heat buildup during operation and supports cleaner cutting by flushing debris away from the working area.

With a working air pressure of 0.22–0.25 MPa and a rotational speed of 320,000–350,000 RPM, the JOSOI Leaf Pattern Large-Head Key-Type High-Speed Handpiece provides efficient clinical performance. Its high-speed operation, high-temperature resistance, low-noise design, 2-hole / 4-hole connection options, and 135°C autoclave compatibility make it a practical instrument for repeated daily use in modern dental clinics. Product specifications are based on the uploaded product document.

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Feature

• The large-head design provides stable turbine operation and strong cutting performance, making the handpiece suitable for procedures that require efficient removal of tooth structure or restorative materials.
• The diamond / leaf-pattern exterior provides a distinctive textured surface, helping improve grip recognition and hand control during wet, gloved, or extended procedures.
• The single-point water spray cooling system directs water toward the bur and cutting area, helping reduce heat buildup during high-speed cutting.
• The internal water channel cooling design supports stable water delivery to the head area, improving cooling reliability during clinical operation.
• The high-speed turbine performance of 320,000–350,000 RPM supports efficient cavity preparation, crown preparation, restorative adjustment, and occlusal reduction.
• The key-type bur removal design provides secure bur fixation and controlled bur replacement, making it suitable for users who prefer a traditional bur-locking system.
• The metal body provides structural stability, durability, and resistance to repeated cleaning and sterilization cycles.
• The 2-hole and 4-hole connection options provide compatibility with common dental unit interfaces.
• The low noise level of ≤60 dB helps create a more comfortable treatment environment for both patients and clinicians.
• The handpiece is compatible with 135°C high-temperature autoclave sterilization, supporting standard clinical infection-control procedures.

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JOSOI Leaf Pattern Large-Head Key-Type High-Speed Handpiece — Specifications

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Working Principle

The JOSOI Leaf Pattern Large-Head Key-Type High-Speed Handpiece operates through a pneumatic turbine system. Compressed air enters the handpiece through the 2-hole or 4-hole connection interface and drives the internal turbine rotor. Under the recommended working air pressure of 0.22–0.25 MPa, the turbine reaches a rotational speed of 320,000–350,000 RPM.

The dental bur is fixed in the head through the key-type bur locking structure. When the turbine rotates at high speed, the bur performs cutting, preparation, or adjustment on tooth structure and restorative materials. The large-head design supports stable bur rotation and helps maintain consistent cutting efficiency during clinical operation.

The internal water channel supplies water to the head area, where the single-point spray outlet directs cooling water toward the bur and cutting zone. This focused cooling helps reduce thermal buildup, cool the bur and tooth surface, and flush away debris from the operative field.

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Clinical Practice of the JOSOI Leaf Pattern Large-Head Key-Type High-Speed Handpiece

1. Pre-Operative Setup

• Inspect the handpiece body, large head, spray outlet, connection interface, and leaf-pattern grip area before use.
• Confirm that the selected dental bur has a shank diameter of Φ1.595–1.600 mm.
• Install the bur according to the key-type bur removal and locking method, and confirm that the bur is securely fixed before operation.
• Connect the handpiece to the appropriate 2-hole or 4-hole dental unit interface.
• Confirm that the working air pressure is within the recommended range of 0.22–0.25 MPa.
• Run the handpiece unloaded for several seconds before intraoral use to check turbine rotation, single-point water spray output, operating sound, and bur stability.
• Confirm that the internal water channel supplies water smoothly and that the spray is directed properly toward the bur tip.

2. Intraoperative Management

• Use the handpiece for routine high-speed procedures such as cavity preparation, crown reduction, restorative adjustment, margin refinement, and occlusal adjustment.
• Maintain light and controlled cutting pressure. Excessive force may reduce turbine speed, increase heat generation, and shorten bearing life.
• Keep the single-point water spray active during cutting to reduce thermal buildup and support debris removal.
• Use the leaf-pattern grip area to maintain stable hand control, especially during wet or extended procedures.
• Adjust the handpiece angle carefully while maintaining continuous cooling at the cutting zone.
• Monitor the operating sound during use. Normal operation should remain at or below 60 dB.
• Stop operation immediately if abnormal vibration, unstable bur rotation, reduced water spray, loose bur retention, or unusual noise occurs.
• Remove or replace the bur only after the turbine has fully stopped.

3. Post-Operative Maintenance

• Remove the bur after the procedure using the proper key-type bur removal method.
• Flush the air and water lines after use to remove residual water, debris, and contaminants.
• Clean the external surface of the handpiece, especially around the large head, spray outlet, connection interface, and textured grip area.
• Check the single-point spray outlet regularly to prevent blockage and maintain proper cooling performance.
• Lubricate the handpiece according to the manufacturer’s maintenance protocol before sterilization.
• Sterilize the handpiece using 135°C high-temperature autoclave sterilization.
• After sterilization, allow the handpiece to dry completely before storage or reuse.

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The Function of the JOSOI Leaf Pattern Large-Head Key-Type High-Speed Handpiece

The JOSOI Leaf Pattern Large-Head Key-Type High-Speed Handpiece is used for high-speed dental cutting in routine clinical procedures. Its main function is to drive standard dental burs at 320,000–350,000 RPM for cavity preparation, crown preparation, restorative adjustment, occlusal reduction, and other procedures requiring efficient material removal.

The large-head structure supports stable turbine operation and consistent cutting performance. This makes the handpiece suitable for procedures where strong cutting stability and smooth bur rotation are important.

The single-point water spray system and internal water channel cooling work together to manage heat during high-speed operation. As friction between the bur and tooth surface generates heat, the cooling water helps protect tooth structure, reduce patient discomfort, and maintain a cleaner cutting field.

The key-type bur removal design provides secure bur fixation and controlled replacement. This is useful for clinics that prefer a traditional bur locking structure with reliable retention during high-speed operation.

The diamond / leaf-pattern exterior provides a textured grip area and a distinctive professional appearance. Combined with the metal body, low-noise operation, and 135°C autoclave compatibility, this handpiece is suitable for reliable daily use in modern dental practices.

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Important Notes for Using the JOSOI Leaf Pattern Large-Head Key-Type High-Speed Handpiece

1. Always confirm that the working air pressure is within 0.22–0.25 MPa before operation.
2. Use only burs with a shank diameter of Φ1.595–1.600 mm.
3. Confirm that the bur is securely fixed before starting the handpiece.
4. Do not operate the handpiece without a bur properly installed.
5. Always keep water spray active during cutting to reduce heat buildup.
6. Check the single-point spray outlet regularly. A blocked outlet may reduce cooling efficiency and affect cutting safety.
7. Confirm that the internal water channel supplies water smoothly before clinical use.
8. Do not remove or replace the bur while the turbine is still rotating.
9. Allow the turbine to fully stop before using the bur removal mechanism.
10. Clean the head area, spray outlet, connection interface, and leaf-pattern grip area carefully after each use.
11. Lubricate the handpiece according to the recommended maintenance procedure before sterilization.
12. Sterilize the handpiece at 135°C using high-temperature autoclave sterilization.
13. After sterilization, inspect the handpiece for abnormal noise, vibration, reduced spray output, loose bur retention, or visible damage before returning it to clinical use.