Colored orthodontic elastics, including the lavender shade, are highly susceptible to discoloration. The small rubber bands, known as ligatures, hold the archwire to the bracket and are the component that stains, not the bracket itself. Choosing a lighter color like lavender means any absorbed pigments will be more noticeable than they would be on a dark elastic. Staining occurs because the material of the bands naturally interacts with the environment of the mouth.
Why Orthodontic Elastics Change Color
Elastics change color primarily due to the porous nature of the material. Ligatures are typically fabricated from polymers, such as polyurethane or latex, which contain microscopic voids or pores. These pores readily absorb molecules from the surrounding oral environment.
When you consume pigmented foods or drinks, the color molecules get trapped and permeate the matrix of the elastic material. This process leads to a permanent stain. Furthermore, the elastics absorb water and saliva, which can cause them to swell slightly and break down internal bonds over time.
Lighter colors, like lavender, white, or clear, lack the depth of pigment to mask this absorption process. The lavender color will rapidly shift from a soft purple to a dull, yellowish-brown or green tint after exposure to common staining agents. This discoloration is a normal function of the polymer material and does not affect the elastic’s ability to apply the necessary force for tooth movement.
Common Stain-Causing Foods and Beverages
Specific foods and drinks contain concentrated pigments that accelerate the staining of porous elastics. The combination of strong color and high acidity in many items accelerates the staining process by making the elastic material more receptive to pigment absorption.
Major Staining Agents
- Highly pigmented sauces, particularly those containing turmeric or curry powder, which can cause severe yellow staining.
- Tomato-based products, such as pasta sauce, ketchup, and chili, due to their acidity and deep red pigments.
- Dark-colored beverages, including coffee, black tea, red wine, and dark sodas, which quickly saturate the elastic material.
- Artificial dyes found in many sports drinks and brightly colored candies.
- Dark berries, such as blueberries, blackberries, and pomegranates, which contain strong natural pigments.
- Dark condiments like balsamic vinegar and soy sauce, which are often overlooked.
Maintaining Elastic Color Between Appointments
To keep your lavender elastics vibrant, limit their contact time with staining agents. After consuming any highly pigmented food or beverage, immediately rinse your mouth thoroughly with plain water. This washes away residual color molecules before they penetrate the elastic material.
Brushing your teeth right after a meal is the most dependable method for removing food debris and preventing color absorption. Use a soft-bristled toothbrush and focus on cleaning carefully around the brackets where the elastics are located. If you are unable to brush immediately, rinsing with water or a non-colored, alcohol-free mouthwash can serve as a temporary measure until you can perform a full cleaning.
When drinking dark liquids, using a straw can help bypass the front teeth and minimize the liquid’s contact with the elastics. Ligatures are designed to be replaced by your orthodontist at every adjustment appointment, typically every two to four weeks. Keeping these appointments ensures that any existing stains are removed with a fresh set of elastics.