Shofu
Shofu ZiLMaster CA Assortment 3 Pcs
Low stock (20 units)Regular price LE 2,800.00 EGPUnit price /Unavailable-
How to Choose the Right Zirconia Burs for Chairside Adjustment
- Grit Size — Adjustment of sintered zirconia requires extra-fine diamond grit, typically under 30µm, at low speed with copious water coolant to avoid inducing microcracks that can propagate into fracture over time.
- Adjustment Speed and Cooling — Zirconia adjustment should be performed at reduced speed with continuous water spray; dry or high-speed grinding generates localized heat that risks microcrack formation in the ceramic.
- Shape Selection — Flame-shaped burs suit occlusal groove refinement, while torpedo and wheel shapes are better suited to broader contact adjustment and interproximal contouring.
- Polishing Sequence — A graduated polishing sequence, medium grit silicone polisher followed by fine grit, restores surface smoothness; skipping the medium step often leaves visible scratch patterns under the fine polisher.
- Polisher Material — Diamond-impregnated silicone polishers are formulated specifically for zirconia and lithium disilicate; standard composite polishers lack sufficient abrasive hardness to properly finish sintered zirconia.
- Post-Adjustment Glazing — Chairside polishing restores a usable surface finish but does not fully replicate a laboratory glaze; for extensive adjustments, consider returning the restoration to the lab for reglazing where esthetics are critical.
Zirconia Burs and Polishers at a Glance
| Type | Shape | Grit/Material | Best Clinical Use |
|---|---|---|---|
| Extra-Fine Diamond Bur | Flame | <30µm diamond grit | Occlusal groove and contact adjustment |
| Extra-Fine Diamond Bur | Torpedo | <30µm diamond grit | Interproximal and margin refinement |
| Silicone Polisher (Medium) | Flame/Wheel | Diamond-impregnated silicone | First-stage polish after adjustment |
| Silicone Polisher (Fine) | Flame/Wheel | Diamond-impregnated silicone | Final gloss restoration |
Availability & Delivery in Egypt
MedSTA prices zirconia burs and polishers in EGP with nationwide delivery across Egypt. Store diamond burs in a dry bur block away from humidity to prevent shank corrosion, and inspect diamond coating wear before each use.
Frequently Asked Questions
Why do zirconia restorations need special burs instead of standard diamond burs?
Why do zirconia restorations need special burs instead of standard diamond burs?
Standard coarse diamond burs can induce microcracks or subsurface damage in sintered zirconia during high-speed grinding, so extra-fine grit burs used at reduced speed with water coolant are recommended to adjust the restoration safely.
What speed and cooling should be used when adjusting a zirconia crown chairside?
What speed and cooling should be used when adjusting a zirconia crown chairside?
Adjustment should be performed at reduced speed with continuous water coolant rather than dry high-speed grinding, since localized overheating during dry adjustment can trigger microcracking in the ceramic.
Do I need to polish a zirconia crown after chairside occlusal adjustment, or is it fine as adjusted?
Do I need to polish a zirconia crown after chairside occlusal adjustment, or is it fine as adjusted?
Yes, polishing is necessary. An unpolished, ground zirconia surface is rougher than the original glazed surface and can accelerate wear on opposing natural teeth; a graduated silicone polisher sequence restores a smooth finish.
Can the same diamond burs be used for both zirconia and metal-ceramic (PFM) adjustment?
Can the same diamond burs be used for both zirconia and metal-ceramic (PFM) adjustment?
Zirconia-specific extra-fine diamond burs can generally also adjust PFM restorations, but burs designed for cutting metal frameworks are typically too coarse for safe zirconia adjustment and should not be substituted.
Does MedSTA supply matching bur and polisher sets for zirconia adjustment across Egypt?
Does MedSTA supply matching bur and polisher sets for zirconia adjustment across Egypt?
Yes. MedSTA supplies zirconia diamond burs in flame and torpedo shapes alongside matching medium and fine silicone polishers, priced in EGP with nationwide delivery across Egypt.