# The Invisalign Palatal expander is directly printed from:
a) polyamide-12
b) TC-85
c) polymethyl methacrylate
d) thermoplastic polyurethane
The correct answer is A. Polyamide-12.
The Invisalign Palatal Expander (IPE) is 3D-printed directly from Polyamide-12 (PA-12), a biocompatible and durable nylon-based material. This material is widely used in medical applications due to its strength, flexibility, and resistance to wear. PA-12 allows for precise and customized expansion while maintaining patient comfort.
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