How are clear retainers made
Clear retainers are shaped over a model made from a digital scan or impression, then trimmed to fit the planned gumline.
The short answer
A clear retainer is a thin thermoplastic appliance shaped over a model of your teeth. The clinic captures the tooth surfaces with an intraoral scan or impression, checks the bite and retainer design, then forms and trims the material so it seats over the intended teeth.
What is the direct answer?
What does this question mean?
Keep the teeth clean before scanning or impression taking, and tell the clinician about loose teeth, attachments, or recent orthodontic changes. When the retainer is delivered, insert it with fingers, rinse it as instructed, and store it in its case when not worn.
What can you do next?
Book a remake or adjustment if the retainer rocks, cuts the gum, no longer seats, or has cracked edges. A retainer that suddenly does not fit can indicate tooth movement and should not be forced into place.
When should you seek dental care?
Ask whether your retainer was designed from a scan or impression, what material and thickness were selected, and where the trim line sits. Ask how often fit and tooth position should be checked.
What should you ask the dentist?
Thermoforming uses heat and pressure to shape plastic over a dental model.
Frequently asked questions
An old retainer can be a reference, but a new scan or impression may be needed when tooth position or fit has changed.
Why does a new retainer feel tight?