HOSA Chairside Assisting / Dental Instruments Practice Test

The micro brush is an ideal instrument for applying primer and sealants in dental procedures. Its small, soft bristles allow for precise application of materials into narrow areas within the tooth surface, ensuring thorough coverage and an even layer without excess material. This precision is crucial when dealing with adhesives or sealants that need to bond effectively to the tooth structure.

While a plastic instrument is also used in dentistry, it is primarily for carrying out other tasks like mixing materials or shaping dental composite. Curing lights, on the other hand, are used to harden light-sensitive materials like composites or sealants once they have been applied. Articulating paper holders serve a different purpose, as they are used for evaluating occlusion by holding articulating paper in place while checking the bite. Thus, the micro brush is specifically suited for the application of primers and sealants due to its design and functionality.