A semi-flexible removable tooth replacement option and partial denture without metal clasps, Acetal Resin Partial Dentures are made from pre-cured monomer-free polyacetal resin. Using CAD/CAM technology, a tooth-colored polyacetyl disk is precisely milled into a framework with tooth-colored clasps that sit lower on the natural tooth than traditional metal clasps, allowing the clasps to be nearly invisible. Denture teeth are milled separately and are joined to the framework by the lab technician to seamlessly fit the edentulous spaces.
When to use Acetal Resin partials
Like Valplast, Acetal Resin Partials are a great option for replacing teeth, especially in the esthetic zone, when the missing teeth are surrounded by natural teeth or crowns that can support the partial.
The Acetal Resin flexible material is available in many shades that correspond with the Vita shade guide. This makes it possible to gain additional retention and stability in the form of tooth-colored clasps and rests without compromising esthetics. Elastic memory allows the clasps to drop into deep undercuts for security, similar to that of a metal clasp but without the unsightly appearance. Tooth-colored rests also prevent the partial from over-seating when flexing and chewing.
When NOT to use Acetal Resin partials
Acetal Resin is not be the best option for bruxism patients. A heavy bruxer can wear the framework and rests, affecting the fit of the partial denture by allowing the semi-flexible framework to over-seat with time.