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Dental Nation
Material guide

Polyurethane Aligner Material

Polyurethane is used in clear aligners that gently reposition teeth, while studies examine leaching, cytotoxicity, and allergic reactions.

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The short answer

Polyurethane aligner material is used in clear plastic shells that apply gentle pressure to gradually reposition teeth.

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Polyurethane Aligner Material dental educational illustration

What is polyurethane aligner material?

How clear aligners work
FeaturePatient meaning
Nearly invisible shellThe appliance snaps over the teeth[1][3]
Gentle pressureThe shell gradually repositions teeth[1][3]

[1][3]

Material properties studied
MaterialTest focus
TPUMechanical behaviour under displacement[3]
Aligner plasticsPossible leaching and biological effects[2][3][4][5][6]

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What properties matter?

The mechanical properties of TPU and other clear-aligner materials influence clinical performance. Studies test how these materials respond to displacement.

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Where is it used?

Polyurethane is used in clear orthodontic aligners. The shells are designed for discreet treatment of crooked or crowded teeth.

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What other clear-aligner materials are studied?

PETG is another thermoplastic used in clear orthodontic aligners, and research compares PETG and TPU mechanical behaviour.

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What does the material do during treatment?

A clear shell snaps over the teeth and applies gentle pressure, gradually moving them. That is the treatment action of the appliance.

[1][3]

What risks are studied?

Research has examined possible BPA release, residual monomer leaching, cytotoxicity, altered cell behaviour, and allergic reactions linked with transparent aligners.

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Frequently asked questions

How does a polyurethane aligner move teeth?

Its clear shell snaps over the teeth and applies gentle pressure that gradually repositions them.

[1][3]

Keep reading

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