Teeth whitening trays have become a go-to solution for achieving a brighter, whiter smile at home. However, it can be confusing to try to decipher the differences between the various types of dentist-prescribed custom trays and over-the-counter kits. 

In this article, we discuss the various types of whitening trays available and their potential benefits and drawbacks so you can make an informed decision about your cosmetic wellness. 

Types of Teeth Whitening Trays

The main types of teeth whitening trays are custom-fitted trays from a dentist, boil-and-bite trays, and pre-filled trays. While each of these types offers its own benefits, custom-fitted trays from a dental professional are most likely to deliver high-quality results. 

Custom-Fitted Trays from a Dentist

Custom-fitted trays are made during a visit to a dental practice. They are made using impressions of your teeth, so you can ensure you’re getting a precise fit. These trays are typically paired with professional-strength bleaching gels, which can provide fast, uniform results. 

However, these high-concentration gels may be difficult for some with sensitive teeth to handle. Additionally, custom-fitted trays carry a higher cost than other whitening tray options. 

Boil-and-Bite Trays

Boil-and-bite trays, also known as thermoform trays, are soft thermoplastic devices you heat and mold to your teeth with your preferred whitening gel or solution. Boil-and-bite trays are less personalized than dentist-made trays, but they still provide some level of custom fit. These trays are often moderately priced and are offered with medium-strength gels. 

Pre-Filled or One-Size-Fits-All Trays

Pre-filled trays are a convenient option as they do not require adding any additional gels. These trays come pre-loaded with a whitening solution and are one-size-fits-all. While these trays are easy to use and affordable, they lack customization to fit your teeth, which could lead to uneven coverage, and it is not effective for severe discoloration.

Comparing Whitening Gel Strengths and Ingredients

According to a study published in MDPI, bleaching is an effective treatment for changing the color of teeth, regardless of the type used.  With that said, different whitening gels have their own benefits and drawbacks, and the best option for you may vary depending on your sensitivity level and overall discoloration. 

Carbamide Peroxide vs. Hydrogen Peroxide

Both carbamide peroxide and hydrogen peroxide are common in teeth whitening procedures. Carbamide peroxide breaks down more slowly than hydrogen peroxide, making it more common in overnight tray use. Hydrogen peroxide, which is frequently used during in-office procedures, provides faster results but may increase tooth sensitivity. 

Professional vs. Over-the-Counter Gels

When it comes to gels, dentist-provided options deliver concentrations of 10-35% for stronger whitening. Alternatively, over-the-counter gels have considerably lower percentages, which reduces the risk of irritation, but requires longer use and has an increased risk of uneven results. 

Customers prone to sensitivity may opt for OTC options due to their lower concentration levels. However, you can also work directly with your dentist to find a gel that is better suited to your tolerance levels, without sacrificing quality.  You may also opt for shorter wear time, which will lead to more gradual results but reduce the exposure to high sensitivity. 

Pros and Cons of Each Tray Type

Each whitening tray type has advantages and disadvantages. For example, custom-fitted trays may provide the most complete coverage, but it also has a higher cost. Pre-filled trays, meanwhile, require no measuring, but may lead to uneven, unsatisfying results. 

Custom-Fitted Trays

• Pros
  
  • More comfortable than other tray options.
  • Has reduced gel leakage, leading to more even coverage. 
  • Is custom-fitted to match your exact profile. 
  • Is supervised by a dentist, so you have professional guidance on duration and gel strength. 
• Cons
  
  • Has a higher cost that will include lab fees from custom fitting. 
  •  Requires a visit to the dentist. 
  • May not be needed for those with minor discolorations only looking for a touch-up.

Boil-and-Bite Trays

• Pros
  
  • Has a semi-custom fit, which could be a good middle ground between custom-fitted trays and one-size-fits-all. 
  • Is an affordable option compared to custom-fitted trays. 
  • Delivers more precision than OTC options without the price of custom-fitted options.
• Cons
  
  • Has a less exact fit than custom-fitted trays made by a dentist. 
  • Has the potential for hot spots or uneven pressure if not molded properly. 
  • Has a higher cost than pre-filled trays without delivering the results of custom-fitted options. 

Pre-Filled Trays

• Pros
  
  • Is easy to purchase. 
  • No measuring or gel application is required.
  • Comes at a minimal price point compared to other options. 
  • Is the quickest way to start whitening. 
  • Straightforward, no measuring or gel application required.

• Cons
  
  • One-size-fits-all design may lead to uneven contact or gel spillage.
  • Uses less potent gels, which can often mean slower or less dramatic results. 
  • Not a realistic option for those with severe discoloration or stains. 

Using Whitening Trays Safely and Effectively

Regardless of what type of teeth-whitening trays you select, you’ll need to make sure you’re using them properly to achieve maximum results and reduce discomfort. Here are some important things to look out for to ensure you’re using the trays safely and effectively. 

• Follow Manufacturer or Dentist Instructions: If using a custom-fitted tray, it’s important to follow a dentist’s instructions of when and how often to use them. Overuse of gel or prolonged wear can lead to enamel damage or sensitivity. If using boil-and-bite or OTC whitening products, read the manufacturer's instructions for specifics on how to wear the trays. If you feel any increased sensitivity, using desensitizing gels or toothpaste can help reduce irritation.
• Maintain Proper Oral Hygiene: Brushing and flossing regularly can help to remove plaque that could block the bleaching agent and lead to reduced whiteness. You should also avoid staining foods and drinks as much as possible, such as dark chocolate, coffee, tea, and red wine. 
• Monitor Results and Make Adjustments: Keep a close eye on how your smile is changing every few days. If you’re using boil-and-bite or OTC whitening products and aren’t noticing the results you’re hoping for, you may want to consider upgrading to a custom-fitted tray. If you’re already using a custom tray and still aren’t getting results, consult with your dentist to see if any adjustments can be made to the bleaching agent or frequency of wearing the trays.

Custom Whitening Trays are Available at Your Local Ideal Dental

Choosing the best teeth whitening tray for you depends on several factors, including your budget, the speed at which you’re looking for results, and your comfort and sensitivity levels. 

While boil-and-bite and OTC trays may be good for small to medium adjustments, custom-fitted trays from a dentist will almost always deliver the most complete teeth whitening. If you’re interested in learning more about custom whitening trays, contact your local Ideal Dental today to schedule an appointment.