Orthodontic Retainer — BPA and Phthalate Leaching from Clear Plastic Retainers, Essix vs Hawley (Thermoplastic PETG/Polycarbonate, Endocrine Disruption) — safety profile
Low riskClear orthodontic retainers (Essix-type, including Invisalign retainers) are vacuum-formed thermoplastic appliances worn 8-22 hours daily to maintain tooth alignment after orthodontic treatment.
What is this product?
Clear orthodontic retainers (Essix-type, including Invisalign retainers) are vacuum-formed thermoplastic appliances worn 8-22 hours daily to maintain tooth alignment after orthodontic treatment. Materials include PETG (polyethylene terephthalate glycol), polycarbonate, and copolyester blends. Polycarbonate-based retainers are synthesized from bisphenol A and can leach BPA into saliva — studies using HPLC-MS detect BPA at 1.5-15 ug/L in artificial saliva after 24-hour incubation with polycarbonate retainers, with leaching accelerated by elevated temperature (hot beverages) and acidic pH. PETG retainers show lower BPA release but may contain phthalate plasticizers (including DEHP) in some formulations. The clinical significance is amplified by duration: retainer patients typically wear appliances for years (often indefinitely at night), and adolescents — the primary orthodontic population — are in active endocrine development. Hawley retainers (acrylic palatal plate with wire clasps) contain methyl methacrylate monomer, which can cause contact stomatitis in sensitized individuals.
What's in it
Click any compound name for its full safety profile, regulatory consensus, and exposure data.
Leachable Monomer
Plasticizer
Frequently asked questions
No FAQs generated.
Look up Orthodontic Retainer — BPA and Phthalate Leaching from Clear Plastic Retainers, Essix vs Hawley (Thermoplastic PETG/Polycarbonate, Endocrine Disruption) in the body app
Search by ingredient, browse by category, or compare to alternatives in the live app.
Open in body View raw API dataReference data, not professional advice. Aggregates publicly available regulatory and scientific information. Why we built ALETHEIA →