National Dental Assisting Examining Board (NDAEB) Practice Exam

Why are glass ionomers becoming popular as luting agents?

1. They provide superior esthetics

2. They have excellent solubility immediately

3. They are less expensive than other materials

4. They bond better to metal surfaces

The correct answer is: They have excellent solubility immediately

Glass ionomers are increasingly favored as luting agents due to their unique properties that offer numerous advantages in dental applications. The correct choice highlights their ability to bond effectively to both tooth structure and metal surfaces, enhancing their utility in various restorative scenarios. One of the key aspects is their chemical bond with metal that occurs due to the ion exchange process, which allows them to adhere strongly without the need for additional bonding agents. This strong adhesion reduces the chances of marginal breakdown, which is critical in ensuring the longevity of restorations and protecting the underlying tooth structure. In addition to their bonding capabilities, glass ionomers release fluoride, which can contribute to the prevention of caries and further enhance the overall health of the tooth. In contrast, the other options do not accurately reflect the main reasons behind the growing preference for glass ionomers: - They are not known for excellent solubility; in fact, they are designed to resist solubility in oral environments. - While they can be cost-effective, claiming that they are less expensive than all other luting materials does not encompass their primary appeal. - Although they do offer good esthetics, this feature is not superior when compared to other materials like resin-based cements. Thus, the bonding properties and