Expanded Function Dental Assistant (EFDA) Board Practice Exam

Crown restorations are typically indicated for teeth that have extensive decay. When a tooth has suffered significant damage or loss of structure due to decay, a filling may not provide sufficient support or protection. Crowns cover the entire tooth, restoring its shape, function, and strength. They are especially beneficial for teeth that have undergone root canal treatment or have large fillings that leave little natural tooth structure remaining.

Amalgam and composite fillings are used for smaller areas of decay and may not provide the structural support necessary for heavily decayed teeth. Veneers are primarily cosmetic treatments aimed at improving the appearance of front teeth and are not designed for restoration in the presence of extensive decay. Thus, a crown is the most appropriate choice for addressing extensive decay, ensuring the tooth remains functional and protected.