Application Background
With the increasing precision of dental treatments and prosthetic manufacturing, diamond tools have become essential in two major domains:
- Clinical Use:
Dentists rely heavily on diamond dental burs for tooth preparation and restoration adjustment.
Their high cutting efficiency and wide applicability have largely replaced traditional tungsten carbide burs. - Laboratory Use:
Dental prosthetic manufacturing increasingly utilizes high-hardness ceramics (such as zirconia).
High-performance diamond tools (PCD tools, electroplated diamond tools, and diamond-coated cutters) are required to effectively perform milling, drilling, and fine finishing operations.
Solutions
We provide two major categories of dental diamond tools:
Dental Burs (Clinical Use)
Used
directly on patients, paired with high-speed handpieces for tooth cutting and
adjustment of all-ceramic restorations.
Dental Grinding Pins (Laboratory Use)
Used with CNC or automated grinding equipment to process common prosthetic materials such as zirconia, feldspathic ceramics, glass ceramics, and resin-based composites.
Products / Functions
- Dental Burs:
Suitable for tooth preparation, margin finishing, restoration adjustment, and fine contouring. - Dental Grinding Pins:
Designed for roughing, finishing, and surface refinement of zirconia prosthetic blocks.
Product Features
- High Cutting Efficiency:
Diamond grains provide strong cutting force for fast removal of hard tissues or high-strength ceramics. - Wide Range of Sizes:
Clinical burs are available in various head shapes (round, cylindrical, tapered, flame-shaped, etc.).
Laboratory tools can be customized for long flutes, micro diameters, or special geometries based on the machining stage. - Long Tool Life and Stability:
Electroplated and coated technologies ensure stable performance over long periods, reducing tool replacement frequency. - Fine Surface Quality:
Produces smooth machined surfaces, reducing the workload of subsequent polishing steps.
Applicable Workpiece Materials
Clinical Use
- Natural teeth (enamel, dentin)
- All-ceramic restorations (zirconia, glass ceramics)
- Metal-ceramic restorations (during adjustment stage)
Laboratory Use
- Pre-sintered (green) zirconia
- Fully sintered zirconia
- Feldspathic ceramic
- Lithium disilicate glass ceramic
- Resin-based composite materials
Recommended Operating Parameters (Literature Supported)
Clinical Use (Dental Burs)
- Handpiece Speed: approx. 200,000–400,000 rpm
- Cooling: continuous water spray; dry grinding is prohibited
- (Studies show that without water cooling, intradental temperature can exceed 200°C, causing pulp damage.)
- • Cutting Pressure: light pressure, short intermittent contact; avoid long uninterrupted cutting.
- Tool Life: diamond wear significantly increases heat generation — regular replacement is required.
Laboratory Use (CNC / Zirconia Grinding)
- Pre-sintered zirconia:
Resin-bond diamond tools recommended; use high rpm and low depth of cut to maintain a ductile removal mode. - Fully sintered zirconia (example optimized parameters from literature):
- Spindle speed: 8000 rpm
- Feed rate: 90 mm/min
- Radial depth of cut: 0.1 mm
- Axial depth of cut: 1.3 mm
- Cooling: water cooling is recommended during final machining to prevent thermal cracks and phase transformation.
- Post-processing: multiple-step polishing is required to reduce surface roughness and improve flexural strength.
Operating Instructions & Precautions
Clinical Use
- Dry grinding is strictly prohibited; always use water spray cooling.
- Avoid excessive pressure to prevent tool breakage or heat damage to the patient’s tooth.
- After use, burs must be cleaned, disinfected, and sterilized according to dental device reprocessing standards (e.g., NTI/ISO).
- Replace tools based on manufacturer guidelines to avoid reduced cutting efficiency and heat-induced injury.
Laboratory Use
- Pre-sintered zirconia: dry machining recommended.
- Fully sintered zirconia: wet machining recommended.
- Use CNC machines with high rigidity to prevent vibration-induced chipping and microcracks.
- After machining, complete the full polishing sequence to reduce roughness and minimize antagonist tooth wear.
- All parameters should be treated as initial reference values and must be validated for each machine and material.