The U.S. Food and Drug Administration (FDA) confirms that clear aligners are a series of removable plastic trays made specifically for the patient and used to gradually move the teeth into specified positions. Although they are a less noticeable alternative to traditional braces, they should not be used without evaluation and monitoring by a licensed dentist or orthodontist.
The FDA reviews and clears clear-aligner devices before they are marketed and sold in the United States. However, in its guidance, it explains that it has not cleared clear-aligner devices sold directly to consumers without a prescription or supervision from a dentist or orthodontist. The agency believes that the absence of professional monitoring may increase the risk of complications, even if the plan includes virtual visits or remote monitoring.
What Happens Before Treatment Begins?
Clear aligners are typically used to treat mild to moderate orthodontic problems, such as crowded teeth, gaps between teeth, and some bite problems. More complex cases may require traditional braces or other treatments, so choosing a product based on its appearance or the ease of purchasing it online is not sufficient.
Treatment begins with an evaluation of the teeth, bite, and dental history, and may include X-ray examinations. Digital scans or impressions are then used to create a three-dimensional model of the mouth and develop a treatment plan. A series of custom trays is subsequently made, with each tray gradually moving specific teeth.
Patients typically wear each tray for one to two weeks before moving on to the next one, and the trays should be worn for at least 20 hours a day or according to the dentist's instructions. During treatment, regular in-person visits help ensure that tooth movement is proceeding as planned. After the final set is completed, the dentist may recommend using a retainer to maintain the result and prevent the teeth from returning to their previous positions.
Benefits Do Not Eliminate Limitations
Some patients may prefer clear aligners because they are less noticeable and can be removed while eating and cleaning the teeth and trays. They may also make oral hygiene easier and reduce dietary restrictions compared with traditional braces. They may be more comfortable for some patients, but these advantages do not mean they are suitable for every case.
Potential limitations include ineffectiveness in treating complex orthodontic cases, the possibility of losing or damaging the trays, and temporary changes in speech, irritation, or an allergic reaction to the materials. Treatment may not progress as it should if the patient does not comply with the recommended wear time. In addition, some existing dental treatments, such as crowns, fillings, and implants, may become loose or detach and require repair or replacement. Reported adverse effects include swelling and sores or scratches.
Why Does In-Person Monitoring Matter?
The FDA states that it has received reports associated with unauthorized clear-aligner devices sold directly to consumers. The reported symptoms included new or worsening tooth pain, jaw pain, bite problems, worsening tooth misalignment, and the appearance of new gaps between the teeth. These reports do not mean that every remote service is unsuitable, as virtual visits can be part of care. However, periodic in-person examinations help detect unintended tooth movement, bite problems, pain, or tooth loss at an early stage.
Editorial reading: The most important practical change in this guidance concerns not the design of the trays, but the emphasis that clear aligners are medical devices that should not be reduced to a product purchased online. The difference between a company's registration with the FDA and clearance of the device itself is fundamental: registration means listing the facility and products, whereas clearance means that the agency reviewed the specific device and permitted its marketing or use under the applicable framework. The suitability of treatment for each patient's condition and responsibility for medical monitoring remain two matters that a digital purchasing process alone cannot determine.
How Can You Verify and Report?
Patients can ask their dentist about the device being used. They can also search the FDA's 510(k) database using product code NXC to verify whether the device has received clearance. Patients should follow wear instructions, attend monitoring appointments, and promptly inform their dentist if pain, bite problems, or unexpected symptoms occur.
The FDA recommends reporting serious adverse events to the agency and the manufacturer through the MedWatch program. It is useful to include unexpected symptoms, the need for additional treatment, the name of the company and device, and any problem related to fit, function, material safety, or tissue reaction, such as allergy or sensitization.