StudentRDH Community Health And Research Principles Practice Test

Which product is used for tray applications and should be avoided in patients with restorations?

Gel or Foam 1.23% APF used in tray Gel 2% Naf fluoride OTC Fluoride Toothpaste Rx Fluoride Rinse

Correct Answer:

Gel or Foam 1.23% APF used in tray

Explanation:

Tray fluoride therapy uses fluoride gel or foam delivered in a tray to maximize contact with the teeth. This often uses acidulated phosphate fluoride (APF) at 1.23%, which has a low pH that helps fluoride uptake by enamel. However, that acidity can attack restorative materials such as composites and porcelains, causing surface roughening, discoloration, or micro-pitting. Because of this risk, APF gel or foam used in trays should be avoided in patients with restorations. Safer alternatives for those patients include neutral pH fluoride gels like 2% sodium fluoride, fluoride varnish, or fluoride rinses, which provide protection without damaging restorations.

Access more questions from this quiz

Continue to StudentRDH Community Health and Research Principles Practice Test for more practice questions and the full quiz experience.

Access More Questions