Here's the question every lab manager asks before switching polishing brush suppliers: “Will these bristles stay put and give me the finish I need across every workpiece size?” Most labs get this wrong—they buy a mixed bag of generic brushes and end up with vibration on large denture bases, or bristle marks on fine crown margins. This 11-model black bristle polishing brush series covers 48mm to 80mm outer diameters with converging and straight patterns, 1 to 4 rows. One mounting system, every polishing stage covered. ISO 13485 certified, CE and FDA registered.
Every dental lab technician has picked up a polishing brush, spun it up to speed, and felt it vibrate because the center bore wasn't cut right. Or watched bristles shed onto a finished crown surface that was supposed to be heading to the clinic. The real cost isn't the unit price of the brush—it's the remake.
G9 is the principle nobody talks about until it bites: using the wrong polishing tool or poor-quality material can ruin a restoration's surface and shorten its clinical life. That's why this black bristle series was built as an 11-model system, not a one-size-fits-most compromise. From the 80mm P80 four-row workhorse for bulk plaster removal to the 51mm J01 single-row brush for fine detail work, each model has a specific job. The bristle pattern—converging on J02/J03/2A-2C, straight on 6A-6C/J01—isn't random. It's matched to the surface geometry the technician is polishing.
11 Models, One Standardized Mounting System
P80 (80mm, 4-row), 2A/2B/2C (79/73/68mm, 2-row converging), J03 (70mm, 3-row converging), 6A/6B/6C (64/60/54mm, 2-row straight), J02 (58mm, 2-row converging), J01 (51mm, 1-row straight). Center bores 25mm-48mm.
In real dental practice across 40+ countries, labs that switch from mixed-brand brushes to this standardized matrix report fewer polishing defects and faster technician training. Every lathe station has the right brush—no adapting, no shimming.
Converging Bristle Pattern for Curved Surfaces
Models J02, J03, 2A, 2B, and 2C feature bristles angled in a converging pattern that naturally wraps into concavities.
Here's what that means clinically: when you're polishing the palate contour of a full upper denture, the converging bristles follow the curve instead of skipping across it. The practical impact on your lab's efficiency is straightforward: fewer touch-up passes, less hand-finishing after the lathe.
Straight Bristle Pattern for Flat Planes and Sharp Edges
Models J01, 6A, 6B, and 6C feature straight, even bristle rows for uniform contact on flat occlusal rims, model bases, and sharp framework edges.
Think about it: a straight row on a flat surface gives you even polish in fewer passes. The 6A-6C series is the go-to for stone model finishing in high-volume labs.
Dense Black Bristle Anchoring
Each brush is manufactured with densely filled bristle tufts that resist shedding under sustained high-speed use.
What the cheap suppliers don't tell you: a brush that sheds bristles mid-polish contaminates the surface and forces a redo. Our fill density was refined based on direct feedback from lab technicians who need consistent results across hundreds of units per week.
Full Certification and Ai Oral Traceability
Every order ships with batch-specific traceability via our Ai Oral marking system (Z5), backed by ISO 13485 certification, CE marking, and FDA registration (Z6). For a dental lab serving multiple clinics, this documentation proves your consumables meet international standards.
| Specification | Detail |
|---|---|
| Model Range | P80, 2A, 2B, 2C, J03, 6A, 6B, 6C, J02, J01, 03B48 |
| Outer Diameter | 48mm, 51mm, 54mm, 58mm, 60mm, 64mm, 68mm, 70mm, 73mm, 79mm, 80mm |
| Row Count | 1-row, 2-row, 3-row, 4-row |
| Bristle Pattern | Converging (J02/J03/2A-2C), Straight (J01/6A-6C) |
| Center Bore | 25mm, 35mm, 40mm, 48mm |
| Certifications | ISO 13485, CE marked, FDA registered |
Clinical Applications
Large-scale denture production: P80 (80mm, 4-row) handles bulk acrylic reduction and rough plaster shaping in commercial labs.
Model and die finishing: 6A-6C series with straight bristle rows deliver fast, even polishing on flat model bases.
Crown and bridge framework detailing: Converging J02 and J03 models reach into interproximal curves on metal substructures.
Fine detail and tight spaces: J01 single-row brush at 51mm fits into narrow clasps, wire retainers, and small orthodontic appliances.
Here are the three mistakes we see dental labs make when sourcing polishing brushes—and how this series avoids them.
Mistake one: buying generic mixed packs. Different workpieces need different brush diameters and bristle patterns, but generic packs give you no choice. You end up using a flat brush on a curved palate and wondering why the finish isn't uniform. Our 11-model system gives you the right brush for every surface.
Mistake two: ignoring bristle pattern. Converging bristles on J02/J03/2A-2C follow curves; straight bristles on 6A-6C and J01 polish flats efficiently. Using the wrong pattern means more passes and more heat. Using the right one means faster finishing and better surface quality.
Mistake three: not checking certifications. CE marking and FDA registration aren't optional if you're supplying restorations to clinics that require traceable consumables. Our ISO 13485 certification and batch traceability system (Z5, Z6) give your lab the documentation you need for clinic audits, without chasing suppliers for certificates.
Custom orders are available for labs that want specific model combinations in bulk, and we offer OEM branding. Lead times are communicated upfront, and every shipment comes with full technical documentation.
Need consistent-quality polishing brushes for high-volume lab work? Send us your typical monthly consumption and the lathe models you use, and we'll recommend the most cost-effective brush combination with bulk pricing. Standard orders ship FOB Shanghai.
Q: What is the lifespan of your rotary instruments and dental burs?
A: Endodontic files are recommended for single-use only, while dental burs can last 5-10 uses depending on procedure type and sterilization methods. Our NiTi rotary files are engineered with advanced heat treatment for superior fracture resistance. Diamond and tungsten carbide burs maintain cutting efficiency through multiple uses when properly sterilized. Sichuan Ai Oral Co., Ltd. manufactures all instruments under strict ISO 13485 quality management standards to ensure consistent clinical performance.
Q: Can I customize product specifications or packaging for my order?
A: Yes, we offer full customization including sizes, taper configurations, grit selections, and sterile or non-sterile packaging options. You can specify ISO sizes (15-40) for endodontic files, grit sizes (fine/medium/coarse) for diamond burs, and custom bracket prescriptions for orthodontic applications. Simply share your clinical or laboratory requirements with our team at Sichuan Ai Oral Co., Ltd., and we will develop a tailored solution that meets your exact specifications.
Q: How do I choose the right instrument for my specific procedure?
A: The choice depends on your procedure type and material requirements. Use NiTi rotary files for root canal preparation; diamond burs for enamel and ceramic reduction; tungsten carbide burs for cavity preparation and amalgam removal; diamond polishers for composite and ceramic finishing; and orthodontic brackets for tooth alignment. Our clinical specialists at Sichuan Ai Oral Co., Ltd. can recommend the optimal product based on your procedure type, material hardness, and desired outcomes.
Q: What is your warranty and quality guarantee policy?
A: We provide a comprehensive quality guarantee covering material defects and manufacturing flaws for all products. Our manufacturing facilities operate under ISO 13485 certification for medical device quality management, with CE marking and FDA registration for key product lines. Sichuan Ai Oral Co., Ltd. offers technical support and replacement for any verified quality issues, ensuring your practice or laboratory maintains uninterrupted workflow.
Q: What is the lead time for bulk orders?
A: Standard bulk orders are typically fulfilled within 25-35 workdays, while custom orders may require 35-45 workdays depending on specifications and quantity. We recommend placing orders 6-8 weeks in advance for large-volume or custom requirements. Our logistics team at Sichuan Ai Oral Co., Ltd. provides real-time shipment tracking and proactive communication throughout the production and delivery process.
Q: How do I know whether to choose converging or straight bristle brushes?
A: Simple rule: converging (angled) bristles for curved surfaces like denture palates and interproximal contours; straight bristles for flat planes like model bases and occlusal rims. We include a selection guide with every order, and if you tell us your typical case mix we'll recommend the right model split.
Q: Will the 80mm P80 fit my older bench lathe?
A: The P80 has a 40mm center bore, which fits most standard polishing motors. If your lathe has a non-standard spindle diameter, let us know the exact measurement and we'll confirm compatibility before you order.
Q: Can we order just the models we use most in bulk?
A: Yes. While the full 11-model series covers every polishing stage, we can supply any single model or custom combination in bulk. Tell us your monthly volume by model and we'll quote a dedicated bulk pack with consistent pricing.
Have more questions about technical specs or bulk orders? Send us a message and we'll reply within one working day.
