Can I reuse my old Invisalign trays after I’ve finished my treatment?

Posted on May 31, 2024

Completing your Invisalign treatment is a significant milestone, marking the journey toward achieving your dream smile. However, it’s not uncommon for patients to wonder about the fate of their old Invisalign trays once treatment concludes. Can these trays find new life after straightening your teeth? Let’s delve into the topic to uncover the possibilities.

Understanding Invisalign Trays: Invisalign trays are custom-made aligners designed to gradually shift your teeth into the desired position. They are typically worn for about 20 to 22 hours a day and changed every one to two weeks as your teeth progress through the treatment plan. Each set of aligners is precisely calibrated to apply the right amount of pressure to move your teeth effectively.

Can You Reuse Old Invisalign Trays? The question of reusing old Invisalign trays arises due to various reasons, including sentimental value, financial considerations, or uncertainty about discarding them. While it might seem tempting to reuse them, it’s essential to understand why this may not be advisable.

1.  Hygiene Concerns:

Over the course of treatment, Invisalign trays accumulate bacteria, plaque, and saliva residue. Despite cleaning efforts, these trays may harbor harmful microbes that could compromise your oral health if reused.

2.   Structural Integrity:

Invisalign trays are engineered to withstand a specific duration of wear and tear. Reusing them beyond their intended lifespan may lead to a loss of structural integrity, affecting their ability to provide adequate tooth movement.

3.  Treatment Efficacy:

Invisalign treatment plans are meticulously designed to address your unique dental concerns. Reusing old trays could disrupt the planned progression, potentially compromising the final outcome of your treatment.

Alternatives to Reusing Invisalign Trays: Instead of repurposing old Invisalign trays, consider alternative options that align with your goals and priorities:

1.      Retainers: After completing your Invisalign treatment, your orthodontist will likely provide you with retainers to maintain the results. These retainers are specifically designed to preserve your new smile without compromising oral health.

2.      Memorabilia: If sentimentality is a driving factor, consider keeping your old Invisalign trays as souvenirs of your transformative journey. Displaying them can serve as a reminder of your dedication to achieving a beautiful smile.

3.      Recycling: While reusing old Invisalign trays may not be recommended, recycling them is an environmentally responsible option. Many orthodontic practices offer recycling programs to dispose of old aligners sustainably.


While the idea of reusing old Invisalign trays may be appealing, it’s crucial to prioritize your oral health and treatment efficacy. Instead, explore alternative options such as retainers or keeping them as memorabilia. Remember, your orthodontist at Nevada Orthodontics & Pediatric Dentistry is here to guide you every step of the way. For expert advice and personalized dental care, contact us at 702.802.0035.

In summary, the journey to a perfect smile doesn’t end with completing your Invisalign treatment—it’s about embracing the newfound confidence and maintaining optimal oral health for years to come.

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