Acrylic Resin

Acrylic resin, specifically polymethyl methacrylate, is a thermoplastic polymer that has served as the primary base material for removable complete and partial dentures since the 1940s. The material is processed by mixing a liquid monomer with a powdered polymer, which polymerizes through heat curing, cold curing, or light curing depending on the application. Acrylic resin can be tinted to closely replicate the appearance of natural gingival tissue and is readily modified, adjusted, or repaired chairside or in the dental laboratory. Beyond dentures, acrylic resin is used to fabricate temporary crowns and bridges, orthodontic retainers, nightguards, and custom impression trays.

The material properties of acrylic resin make it well-suited for prosthetic dentistry despite certain limitations. It is lightweight, relatively inexpensive, and biocompatible when properly processed. However, acrylic resin is more porous and less fracture-resistant than alternative materials such as nylon-based thermoplastics or metal-reinforced frameworks. Porosity can lead to bacterial colonization and odor retention over time, which is why proper denture hygiene and periodic professional cleaning are recommended. Advances in material science have produced high-impact acrylic formulations with improved strength and reduced porosity, and computer-aided design and manufacturing processes now allow milled acrylic restorations with superior density and fit compared to traditionally processed versions.

In the revenue cycle, acrylic resin prosthetics are coded under specific CDT categories for complete dentures, partial dentures, and provisional restorations. Billing teams should be aware that lab fees for acrylic-based appliances are typically included in the procedure fee unless the practice uses an external laboratory that bills separately. Relines, rebases, and repairs to acrylic dentures each have distinct CDT codes and should be submitted separately from the initial prosthetic placement. Accurate coding of the prosthetic type and material ensures clean claims and prevents downcoding or denial based on material misclassification.