Describe one type of dental acrylic resin.

• A. Polystyrene used for fillings
• B. Polymethyl methacrylate (PMMA) used for dentures and temporary crowns
• C. Polycarbonate used for orthodontic retainers
• D. Polyethylene used for mouth guards

Answer: (B)

Polymethyl methacrylate (PMMA) is widely recognized in dentistry for its versatility and effectiveness, particularly in the fabrication of dentures and temporary crowns. PMMA is a type of acrylic resin that exhibits favorable properties such as strength, aesthetic qualities, and ease of manipulation, making it suitable for dental applications.

One of the key attributes of PMMA is its ability to mimic the appearance of natural teeth and gums, which is crucial for patient acceptance in prosthetic dentistry. It can be easily molded and shaped when it is in its warm, plastic state before polymerizing into a rigid form, allowing for precise fit and comfort when creating dentures.

Moreover, PMMA is durable and resistant to many chemicals, making it an excellent choice for dental prosthetics that are regularly exposed to the oral environment. Its relatively low cost and ease of use also contribute to its popularity in both temporary and permanent restorations.

This clear application in creating functional and aesthetic solutions in dentistry reflects why PMMA is considered a vital material within the realm of dental acrylic resins.