Which abrasive is used to finish acrylic denture bases?

Flour of pumice is specifically used to finish acrylic denture bases due to its unique properties as an abrasive. This fine powder is effective in providing a smooth surface on acrylic materials without causing damage or excessive scratching. It is gentle yet capable of polishing the surface to a high shine, which is essential for esthetics and comfort in denture wearers.

In the context of denture creation, achieving a polished finish is crucial, as it not only improves the appearance of the dentures but also helps in preventing plaque accumulation and ensuring comfort for the patient. The abrasiveness of flour of pumice is well-suited for use on acrylic materials, allowing for effective polishing while minimizing the risk of leaving deep scratches or imperfections.

Other abrasives listed, such as sand and silex, are generally too coarse for this specific application and may cause unwanted roughness or damage. Zirconium silicate, while also an abrasive, is not as commonly utilized for acrylic finishes as flour of pumice, which has established its effectiveness in dental practices for this purpose.