What is the method used to create custom trays for at-home whitening?

The boiling water method is the correct technique used to create custom trays for at-home whitening. This method involves heating a thermoplastic material in boiling water until it reaches a pliable state. The softened material can then be molded directly over the dental arch to create a custom fit that is comfortable for the patient and effective for application during the whitening process.

Custom trays made this way ensure even distribution of whitening gel, maximizing the effectiveness of the treatment while minimizing the risk of irritation to the gums and surrounding tissues. This tailoring is crucial as it allows the tray to adhere closely to the teeth, ensuring that the whitening agent is in contact with the teeth for the desired duration.

Other techniques, such as the cold impression and direct molding approaches, do not provide the same level of customization and fit. The laser fitting technique is not typically used in at-home whitening and generally pertains to different applications in dentistry. Understanding the boiling water method is essential for dental assistants to ensure they can provide effective home care solutions for patients seeking teeth whitening.