Which one of the following materials may be used to construct a temporary crown but not a permanent crown?

Acrylic is commonly used to construct temporary crowns primarily because of its ease of fabrication and adjustments in dental settings. Temporary crowns serve to protect the prepared tooth while allowing the gums to heal and the final crown to be manufactured. Acrylic can be molded quickly and effectively to fit the patient’s specific tooth shape during chairside procedures.

In contrast, materials such as ceramic, gold, and non-precious metals are utilized in the creation of permanent crowns. These materials are chosen for their durability, strength, and aesthetic properties that are designed for long-term use. Permanent crowns must withstand the forces of chewing and last for many years, which acrylic cannot, making it unsuitable for permanent applications. Therefore, acrylic is ideal for temporization due to its properties that fulfill the needs of temporary restorations while being less suitable for long-term use.