Different types of clear dental trays
Dental AestheticsTreatments & SurgeryCare & Prevention

What Is a Dental Tray? A Guide to Aligners, Night Guards & More

Faced with traditional orthodontic appliances that are often considered cumbersome, clear dental trays are gaining popularity, especially among adults, thanks to their discretion and increased comfort. But what exactly does the term "dental tray" cover? This guide explores the different types of trays, their specific functions, how they work, as well as practical information on their use and cost.

General Definition of a Dental Tray

What is a dental tray?

A dental tray is a removable appliance, usually made of a clear or semi-transparent plastic material, custom-designed to fit perfectly over a patient's teeth. There are several types of trays, each with a very specific function.

We primarily distinguish between orthodontic trays, intended to move teeth, and other types designed to protect teeth, treat certain disorders, or apply specific products.

Orthodontic Trays (Clear Aligners)

This is the most well-known category today, popularized by brands like Invisalign. These trays, called aligners, are intended to align and straighten teeth, offering a discreet alternative to metal or ceramic braces. They are particularly effective for correcting issues like crowding, spacing (diastemas), and tooth rotations.

How Do Aligners Work?

The treatment involves a series of custom-made aligners that apply gentle, controlled forces to gradually move the teeth into their ideal position. Each aligner in the series is worn for about 1 to 2 weeks for at least 20-22 hours a day before moving to the next one. The process is digitally planned by an orthodontist to ensure a precise and predictable outcome.

Hand holding a pair of clear dental aligners
Orthodontic aligners are nearly invisible and removable, offering a modern approach to straightening teeth.

Cost and Insurance Coverage

The price of a complete clear aligner treatment in the US typically ranges from $3,000 to over $8,000. Many dental insurance plans that cover traditional orthodontics will also cover a portion of the cost for clear aligners, often up to a lifetime maximum benefit.

Other Common Types of Dental Trays

Beyond orthodontics, other trays serve very different but equally important functions:

Occlusal Splints (Night Guards) for Bruxism

Main Function: Protection and Relaxation

These rigid or semi-rigid trays, worn at night, are designed to protect teeth from the damaging effects of bruxism (teeth grinding or clenching). They can also help relieve jaw muscle and joint pain associated with temporomandibular joint (TMJ) disorders. The cost of a custom-made night guard from a dentist typically ranges from $400 to $800 and is often partially covered by dental insurance as a necessary medical device.

Teeth Whitening Trays

These soft, flexible trays are custom-made by a dentist to hold a professional-strength whitening gel against the teeth. This ensures even whitening and protects the gums from irritation. The cost for custom trays and gel typically ranges from $300 to $600 and is considered a cosmetic procedure, so it is not covered by insurance.

Soft dental tray containing whitening gel
Whitening trays allow for a controlled and even application of the bleaching gel.

Athletic Mouthguards

Essential for contact sports, these thicker, shock-absorbing trays protect the teeth, lips, and jaw from trauma. While over-the-counter "boil-and-bite" options exist, a custom-made mouthguard from a dentist offers vastly superior fit, comfort, and protection. The cost varies and is usually not covered by dental insurance.

Conclusion: A Custom Tray for Every Need

The term "dental tray" encompasses a wide range of custom-fit devices, each designed for a specific purpose. From straightening your smile to protecting it from grinding or sports injuries, there is a tray for nearly every need. It is essential to consult with a dentist or orthodontist to determine if a dental tray is right for you and to ensure you receive the correct type for your specific oral health situation.

FAQ: Your Top Questions About Dental Trays

An aligner is an active tray designed to apply force and move teeth into a new position. A retainer is a passive tray designed to hold teeth in their final, corrected position after orthodontic treatment is complete. Aligners are part of the treatment; retainers are for maintenance.

Over-the-counter "boil-and-bite" night guards can offer some protection, but they are often bulky, ill-fitting, and can sometimes worsen jaw problems. A custom-fit occlusal splint from a dentist is made from more durable material and is precisely designed to protect your teeth and relax your jaw muscles, making it a much more effective long-term solution.

Most trays should be cleaned daily by gently brushing them with a soft toothbrush and cool water. You can use a mild, clear soap, but avoid using regular toothpaste, as it can be abrasive and create microscopic scratches. Specialized cleaning tablets or solutions are also available for deeper cleaning. Always rinse them before placing them in your mouth.