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How do I adjust the flexible clasps chairside at seating?

One advantage of metal-free thermoplastic partials is that the resin clasps can be modified chairside using gentle heat. The flexible resin clasps have a lower elastic modulus than metal, which allows controlled reshaping.

At seating, adjustments should be none to minimal. If a clasp fit needs modification, follow ROE's protocol:

Situation Action
Clasp fits too tightly Use a heat gun or torch to warm the plastic to approximately 212°F / 100°C, then bend the clasp outwards and cool it in cold water
Clasp is too loose Use the same heating procedure, but bend the clasp inwards, then cool in cold water

After adjusting clasps, use pressure indicating paste to determine pressure areas, make adjustments as necessary, and then finish and polish before seating the final partial denture.

Because the material is flexible, it tolerates this kind of chairside modification well, and the appliance returns to a stable shape once cooled. For repair, relining, or adding teeth to an existing appliance, ROE provides dedicated video resources, including Everything You Need to Know about Repairing and Adjusting Valplast Dentures and Adding Additional Teeth to an Existing Valplast Partial. Contact your dedicated support team for case-specific guidance.

 

Additional Resources

For more information concerning the digital dentures:

Contact Information

For help with a digital denture solution for your next case, contact ROE Dental Laboratory: