Expired Goods: Crucial Facts You Should Never Ignore

10. Retainers

Lasts: 6 months to 3 years *Average cost per arch: $150–$300* Plastic or wire retainers hold hard-won orthodontic results, yet grinding, heat, or accidental drops can warp them.

Advertisement

Retainers © Shutterstock/ AUWAE Photo Clean daily with lukewarm water, avoid boiling, and consult your dentist if edges crack or the fit loosens. A snug replacement keeps teeth from drifting.