National Dental Assisting Examining Board (NDAEB) Practice Exam

In which situation should sealants not be used?

1. Deep pits and fissures without decay

2. Patients who are cooperative

3. Obvious dental decay

4. Routine cleaning

The correct answer is: Obvious dental decay

Sealants are a preventive measure used to protect the teeth, especially in areas with deep pits and fissures that are prone to decay. Their primary function is to act as a barrier against food particles and bacteria, thus preventing the onset of dental caries. In situations where obvious dental decay is present, the application of sealants is not appropriate since the decay needs to be treated first. Sealants cannot seal over decayed areas; doing so would actually trap bacteria and prevent proper treatment, leading to further deterioration of the tooth structure. Therefore, when there is clear evidence of decay, the correct course of action is to address the decay directly rather than attempting to seal it. This emphasizes the need for a proper diagnosis and treatment plan before considering preventive measures like sealants.