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In digital dentistry, the precision of CAD/CAM milling is the bridge between a digital scan and a perfect clinical fit. However, Zirconia—even in its pre-sintered state—is highly abrasive. Standard tungsten carbide burs dull rapidly, leading to micro-chipping at the critical margin areas (the thin edges of crowns and veneers).
Tiansheng Hengzuan (TSHZ) has engineered a specialized line of CVD Diamond Coated Dental Burs. By applying a pure crystalline diamond layer, we solve the two most expensive problems in dental labs: premature tool failure and edge integrity loss.
1、Marginal Chipping: As a bur wears down, cutting forces increase, causing “shattering” at the thin cervical margins. This leads to poor fitment and increased manual rework.
2、Color Contamination: Low-quality coatings can flake off during high-speed milling. These metallic residues can compromise the translucency and shade accuracy of the zirconia during sintering.
3、Low Throughput: Frequent tool changes disrupt unattended milling cycles, reducing the total units produced per shift.
Using Chemical Vapor Deposition (CVD), we grow a high-purity polycrystalline diamond film directly onto the carbide shank.
Performance: Wear resistance is 8-10 times higher than standard coatings.
The ROI: Depending on the material hardness, a single TSHZ bur can stably process over 500 units, drastically lowering the tool cost per crown.
Milling zirconia creates a massive amount of fine dust that can stick to the cutting edge, leading to heat buildup.
Seamless Evacuation: Our diamond coating features an ultra-low friction coefficient (< 0.1). Combined with our optimized flute design, zirconia powder is evacuated like a fluid, preventing Built-Up Edge (BUE).
Aesthetic Superiority: The smooth cutting action ensures the milled surface is fine and uniform, reducing the time required for post-milling polishing.
For 0.6mm or 0.3mm burs used in fissure and margin detailing, coating uniformity is everything.
Precision Control: TSHZ uses a proprietary thickness compensation technique to ensure a uniform 10-15μm layer across the entire ball-end geometry.
The Result: Perfect reproduction of delicate veneer margins without chipping, ensuring a seamless fit for the patient.
Our CVD process is strictly controlled to ensure a pure carbon diamond layer, free from impurities.
Bio-Safety: There is zero metal migration during the milling process, preserving the natural translucency and shade of the zirconia after sintering, meeting all medical-grade requirements.
To maximize the life of your diamond burs, we recommend the following parameters for standard CAD/CAM systems:
| Bur Diameter (mm) | Recommended RPM | Feed Rate (mm/min) | Primary Function |
| φ2.0 / φ2.5 | 18,000 – 25,000 | 1,200 – 2,000 | Roughing (Opening) |
| φ1.0 | 25,000 – 35,000 | 800 – 1,200 | Semi-Finishing |
| φ0.6 / φ0.3 | 35,000 – 45,000 | 400 – 600 | Margin & Fissure Detailing |
In the competitive dental lab industry, throughput and quality are the only metrics that matter. Tiansheng Hengzuan (TSHZ) Diamond Burs are more than just tools—they are an insurance policy for your finished crowns.
Don’t let a dull bur ruin a perfect design. Choose TSHZ for surgical precision and unmatched longevity.
Graphite, Ceramics, and Carbon Fiber are the future, but they are “tool killers.” If you’re still using traditional coating, you’re fighting a losing battle.
Our CVD (Chemical Vapor Deposition) Diamond Coating creates a real crystalline diamond layer on the carbide substrate. This isn’t just a “finish”—it’s a shield.
Why top distributors choose our CVD series:
1.Ultra-Low Friction: Prevents chip welding and heat buildup.
2.Extreme Abrasion Resistance: Maintains sharp cutting edges $20 \times$ longer.
3.Surface Finish: Mirror-like results on the workpiece, zero secondary polishing needed.
