Which of the following statements about sealant application is true?

The statement regarding light-cured sealants leading to wrist fatigue if precautions aren't taken is accurate because the application process often involves prolonged holding of a curing light, which can put strain on the wrist and hand of the dental professional. This is particularly relevant during procedures that require the practitioner to maintain a steady hand position while curing the sealant. Without proper ergonomics and technique, it's possible to experience discomfort or fatigue, highlighting the importance of using appropriate posture and taking breaks as needed.

Other statements have limitations. The assertion that sealants should never be reapplied overlooks the fact that sealants may wear down over time or become defective, necessitating reapplication. The idea that sealants made without fillers are more effective is misleading, as fillers often enhance the sealant's strength and wear resistance. Additionally, while sealant application is a common procedure performed in a dental office, it is not strictly confined to a dentist’s office and can sometimes be performed by dental hygienists or assistants, depending on local regulations and practice settings.