How to Finish and Polish Flexible Partials with TCS Abrasives and Buffs

To finish and polish flexible partials, work from coarse to fine: cut off the sprues, reduce bulk with a knock down wheel or coarse bur, refine with stones and fine burs, rubberize the whole surface, pumice, then bring up the shine with tripoli on a soft rag buff. TCS (Thermoplastic Comfort Systems) makes a dedicated abrasive for each of those steps, and Chase Dental Supply carries the full set.

Thermoplastics do not finish like acrylic, so this guide walks through the TCS finishing sequence for flexible partials step by step, with the tools to use at each stage and the speed limits TCS lists for them.

Key Takeaways

• Finish in order: sprue removal, gross reduction, refining, rubberizing, pumicing, high shine.
• Respect TCS speed limits: Pink Zirconia Coarse Bur max 16,000 RPM, Fine Bur max 12,000 RPM, Green Mounted Stones at 30,000 RPM.
• Rubberizing the entire partial, borders included, is the step that sets up a high shine.
• Polish Unbreakable with Brown Tripoli on a dry, soft Rag Buff at low speed for 3 to 5 minutes; follow with iShine on iFlex.
• Dentists can make chairside touch-ups with the TCS Doctor Chairside Adjustment Kit.

Why do flexible partials need different finishing tools than acrylic?

Flexible partials are made from thermoplastics such as TCS Unbreakable (nylon) and iFlex (polyolefin), which respond to heat and abrasion differently than acrylic. Tools that clog, generate heat or leave fibers will slow you down and dull the final shine.

TCS designs its wheels, burs and buffs specifically for thermoplastics. For example, the White Knock Down Wheel will not clog and generates little heat, which TCS notes makes it excellent for Unbreakable. If you are new to the material itself, start with our TCS Unbreakable material guide.

How do you finish and polish flexible partials step by step?

Follow six stages, moving from the most aggressive tool to the softest. Always check your handpiece or lathe speed against the limits TCS lists for each abrasive.

Step 1: Remove the sprues

The 4 inch TCS Econo Cutter X-Large cuts the sprues off Unbreakable after injection. It requires its own special X-Large mandrel.

Step 2: Gross reduction

The TCS White Knock Down Wheel 3 inch is one of the first steps in finishing, cutting excess bulk and trimming the partial to the desired length. Before using it for the first time, round the edges of the wheel with a truing stone.

For handpiece work, the TCS Pink Zirconia Coarse Bur handles gross reduction and trimming to length at a maximum of 16,000 RPM. The TCS Carbide Bur 1 is designed to cut thermoplastics and is used to seat Unbreakable on the master model.

Step 3: Refine the surface

TCS Green Mounted Stones cut thermoplastics moderately and leave a smooth surface; use them in a handpiece that can be regulated to 30,000 RPM or on a lathe. TCS Pink Grinding Wheels are an economical option for the same stage.

The TCS Pink Zirconia Fine Bur (max 12,000 RPM) leaves the surface smooth and prepped for the brown rubber wheel. Use the TCS Carving Knife to remove extended fibers that sometimes appear during processing and to define necklines.

Step 4: Rubberize the entire partial

Rubberizing is the step that makes or breaks the final shine, so cover the whole partial, borders included. The TCS Rubber Wheel 304-F (3 inch diameter, 1/4 inch thick) and the 306-F (3 inch, 3/8 inch thick) are long lasting wheels for smoothing Unbreakable partials.

TCS Rubberized Abrasives in thin and thick versions do the same job, and TCS Brown Rubber Points reach tight areas to eliminate scratches.

Step 5: Pumice

The TCS Turbo Buff Rag is a pumicing buff made with siliconized cotton cloth, and it is for pumicing only. Pair it with TCS Polycril, an advanced formula for pumicing acrylics and thermoplastics at high speed.

Step 6: High shine

TCS Brown Tripoli is designed for the high shine of Unbreakable. Use it for 3 to 5 minutes with the dry, soft TCS Rag Buff at low speed.

The TCS Rag Buff is stitched only in the center, which gives it the extra softness needed for polishing Unbreakable. For iFlex partials and other polyolefin thermoplastics, follow the Brown Tripoli with TCS iShine on a dry rag buff.

How can dentists adjust and polish a flexible partial chairside?

Use the same family of tools in a smaller kit. The TCS Doctor Chairside Adjustment Kit includes the essentials for chairside adjustments on Unbreakable partials.

The kit contains a Green Mounted Stone, large and small Brown Rubber Points, a Pink Zirconia Fine Bur, a Carving Knife, a sample of Green Hi-Shine paste, 2 Mini Rag Buffs and 5 Mini Fuzz Buffs. TCS recommends Mini Rag Buffs with green hi-shine polishing paste for touch-ups after minor adjustments.

What are the most common finishing mistakes with thermoplastics?

Most problems come from skipping steps or running tools too fast. A few habits prevent them.

• Running burs over their limit. Stick to the maximum RPM TCS lists for each bur and stone.
• Skipping rubberizing. Going straight from stones to polish leaves scratches the tripoli cannot remove.
• Using a stiff or wet buff for the final shine. TCS specifies a dry, soft Rag Buff at low speed with Brown Tripoli.
• Leaving fibers. Trim extended fibers with the Carving Knife before polishing.
• Poor separation at processing. Stone stuck to the partial adds finishing time. A thermoplastic separator such as TCS EZ Flow, covered in our TCS injection system guide, helps partials come out clean.

For general lab polishing tools beyond TCS, see our Meta Dental polishers, mounted stones and diamonds guide.

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Frequently Asked Questions

What is the correct order for finishing a flexible partial?

Remove the sprues, reduce bulk, refine the surface, rubberize the entire partial, pumice, and then polish for a high shine. TCS makes a dedicated tool for each stage, from the Econo Cutter to the Rag Buff.

What speed should I use for TCS Pink Zirconia burs?

TCS lists a maximum of 16,000 RPM for the Pink Zirconia Coarse Bur and 12,000 RPM for the Pink Zirconia Fine Bur. Both are used in a handpiece.

How do you get a high shine on TCS Unbreakable?

Rubberize the whole partial first, then pumice. Finish with TCS Brown Tripoli on a dry, soft TCS Rag Buff at low speed for 3 to 5 minutes.

Is iFlex polished the same way as Unbreakable?

The sequence is similar, but TCS recommends following Brown Tripoli with TCS iShine on a dry rag buff for iFlex partials and other polyolefin thermoplastics.

Can a dentist adjust a flexible partial chairside?

Yes. The TCS Doctor Chairside Adjustment Kit includes a Green Mounted Stone, Brown Rubber Points, a Pink Zirconia Fine Bur, a Carving Knife, Green Hi-Shine paste and mini buffs for chairside adjustments and polishing touch-ups.

A consistent finishing sequence is what turns a clean injection into a partial the dentist is proud to seat. Stock your bench with the complete TCS (Thermoplastic Comfort Systems) finishing line from Chase Dental Supply, explore other brands in our dental lab and office supply brands guide, or email sales@chasedentalsupply.com with questions.