What function can a dental hygienist perform regarding adhesives?

The correct answer highlights the role of a dental hygienist in the removal of adhesives using nonmotorized hand instrumentation. In the context of dental hygiene practice, removing adhesives is a procedure that falls within the hygienist's scope of practice. This involves using specialized tools to safely and effectively remove materials like dental cement or bonding agents from teeth or orthodontic devices without causing harm to the surrounding tissues.

This function is critical, as it directly relates to maintaining oral health and ensuring the proper function of dental restorations. It also underscores the importance of using nonmotorized hand instrumentation, which aligns with the clinical competencies and methodologies that dental hygienists are trained to perform.

In contrast, other functions listed, such as placing orthodontic devices and fabricating crowns, typically exceed the scope of practice for dental hygienists and are reserved for dentists. Additionally, while dental hygienists can apply fluoride treatment, it does not directly relate to the handling of adhesives. Thus, focusing on the removal of adhesives accurately represents the responsibilities and training of dental hygienists within Iowa's regulations.