What are the two most commonly used materials for provisional coverage?

Methyl methacrylate and Bis-Acryl are indeed the two most commonly used materials for provisional coverage in dental practice. Methyl methacrylate is widely recognized for its durability and ease of handling, making it a traditional choice for creating provisional crowns. It can be polymerized quickly and is adjustable, allowing dental assistants and dentists to achieve a custom fit for patients.

Bis-Acryl (often a Bis-GMA based material) is valued for its superior aesthetic properties and compatibility with the surrounding tissues. It offers a more lifelike appearance than methyl methacrylate, making it particularly popular for anterior provisional restorations where aesthetics are critical. Bis-Acryl materials often have a more favorable handling characteristic, reducing the risk of dimensional changes after setting.

Both materials are favored due to their ability to provide temporary coverage that can withstand normal forces while maintaining aesthetics until the final restoration is ready. This is essential in dental procedures, as maintaining tooth integrity and esthetics during the treatment period is crucial for patient comfort and satisfaction.