{"hq_id":"hq-p-spe-000004","name":"Dental Composite Fillings and Resin-Based Sealants","category":{"primary":"specialty","secondary":"","tags":[]},"product_tier":"SPE","overall_risk_level":"low","description":"Patients seeking 'mercury-free' restorations switched from amalgam to composite — not realizing composite contains bis-GMA, a BPA-derived monomer that continuously hydrolyzes in saliva. The irony: health-conscious patients replaced one environmental chemical (mercury) with another (BPA).","synthesis":{"derived_risk_level":"moderate_to_high","synthesis_confidence":0.5,"synthesis_method":"compound_composition","context_used":"human_adult","context_source":"product_users","exposure_modifier":1.15,"vulnerability_escalated":false,"escalation_reason":null,"compounds_resolved":1,"compounds_total":1,"synthesis_date":"2026-05-09","synthesis_version":"1.2.0","methodology_note":"exposure_modifier and adjusted_magnitude are computed from ALETHEIA-calibrated heuristics (route × duration × frequency multipliers, clamped to [0.5, 1.4]). Multipliers are directionally informed by EPA Exposure Factors Handbook (2011) and CalEPA OEHHA but are not regulatory consensus. See /api/methodology for full disclosure."},"hazard_summary":{"critical_concern":"Dental composites contain bis-GMA, a bisphenol A-derived monomer that hydrolyzes in saliva → BPA release (0.6–90 µg/day first 24 hr). Every composite filling since the 1960s is a BPA source. Pediatric sealants produce measurable urinary BPA in children 24–48 hr post-application. Marketed as 'mercury-free' alternative without BPA hazard disclosure.","key_hazards":["BPA release from bis-GMA hydrolysis (0.6–90 µg/day first 24 hr)","Estrogenic TEGDMA and HEMA co-monomers","Pediatric sealants: BPA in urine 24–48 hr post-application","HEMA occupational Type IV sensitization in dentists","Informed consent gap: patients unaware of BPA-containing material when selecting composite to avoid mercury"],"overall_risk":"low","primary_concerns":[],"sensitive_populations":"","exposure_routes":""},"exposure":{"routes":["dermal","inhalation"],"contact_types":["dermal","internal_reproductive"],"users":["adult"],"duration":"hours","frequency":"daily","scenarios":["Dermal contact during handling of Dental Composite Fillings and Resin-Based Sealants (hours contact)","Inhalation exposure during use of Dental Composite Fillings and Resin-Based Sealants"],"notes":"Exposure to Dental Composite Fillings and Resin-Based Sealants occurs via dermal, inhalation."},"consumer_guidance":{"red_flags":[{"indicator":"Identified safety concern","meaning":"Dental composites contain bis-GMA, a bisphenol A-derived monomer that hydrolyzes in saliva → BPA release (0.6–90 µg/day first 24 hr).","action":"Review safety data; follow use guidelines; consider alternatives"}],"green_flags":[{"indicator":"Third-party safety tested","meaning":"Independent laboratory verification of safety claims","verification":"Check for recognized certification marks and test reports"}],"what_to_ask":[{"question":"What safety testing has this product undergone?","why_it_matters":"Third-party testing provides independent verification of safety claims"}],"alternatives":[{"name":"Glass ionomer cement","notes":"Lower toxicity profile; better fluoride release; less technique-sensitive"},{"name":"Ceramic or porcelain restorations","notes":"Inert material; no polymerization byproducts; greater longevity"}],"notes":null},"regulatory":{"applicable_regulations":[{"jurisdiction":"USA","regulation":"FDA 21 CFR Parts 800–898","citation":null,"requirements":"Medical device classification and premarket requirements. Biocompatibility testing per ISO 10993.","compliance_status":null,"effective_date":null,"enforcing_agency":null,"penalties":null,"source_ref":null},{"jurisdiction":"EU","regulation":"MDR (EU) 2017/745","citation":null,"requirements":"CE marking, clinical evaluation, UDI, CMR/EDC restrictions.","compliance_status":null,"effective_date":null,"enforcing_agency":null,"penalties":null,"source_ref":null}],"certifications":[{"name":"ISO 10993","issuer":"ISO","standard":"ISO 10993 Biological Evaluation of Medical Devices","scope":"Biocompatibility testing for medical devices"},{"name":"FDA 510(k)/PMA","issuer":"FDA","standard":"21 CFR Parts 800-898","scope":"Medical device premarket review and approval"}],"labeling":{"required_disclosures":[],"prop65_warning":{"required":null,"chemicals":[],"endpoint":null,"notes":null},"ghs_labeling":{"required":null,"signal_word":null,"pictograms":[],"hazard_statements":[],"notes":null},"hidden_ingredients":{"trade_secret_protected":null,"categories_hidden":[],"estimated_count":null,"known_concerns":null,"notes":null},"notes":null},"recalls":[],"regulatory_gap":null,"notes":null},"lifecycle":{"recyclable":false,"disposal_guidance":"Follow manufacturer return/disposal guidelines; medical waste regulations may apply","hazardous_waste":true,"expected_lifespan":"3-10_years"},"formulation":{"form":"liquid","key_ingredients":[{"hq_id":null,"name":"Bisphenol A (BPA) diglycidyl ether (BADGE)","role":"base_material","concentration_pct":"40-60"},{"hq_id":null,"name":"Epichlorohydrin (ECH)","role":"base_material","concentration_pct":"10-20"},{"hq_id":null,"name":"Amine or anhydride hardener/curing agent","role":"additive","concentration_pct":"30-40"},{"hq_id":null,"name":"Filler or pigment (optional)","role":"additive","concentration_pct":"0-20"}],"certifications":[]},"materials":{"common":[{"material_id":"hq-m-str-000081","material_name":"Dental Composite Resin and Bis-GMA Monomer System","component":"tooth restoration and sealant","prevalence":"common"}],"concerning":[{"material_id":"hq-m-str-000081","concern":"BPA release from bis-GMA hydrolysis (0.6–90 µg/day first 24 hr)","compounds_of_concern":["hq-c-org-001718"],"source_refs":[]},{"material_id":"hq-m-str-000081","concern":"TEGDMA estrogenic activity and salivary leaching (5–100 µg/L)","compounds_of_concern":[],"source_refs":[]},{"material_id":"hq-m-str-000081","concern":"Pediatric sealant application → BPA in urine 24–48 hr post-application","compounds_of_concern":["hq-c-org-001718"],"source_refs":[]},{"material_id":"hq-m-str-000081","concern":"HEMA occupational Type IV contact sensitization in dental professionals","compounds_of_concern":[],"source_refs":[]},{"material_id":"hq-m-str-000081","concern":"No BPA-alternative composite materials widely available; patients not informed of BPA-containing restoration","compounds_of_concern":["hq-c-org-001718"],"source_refs":[]},{"material_id":"hq-m-str-000081","concern":"Potential contaminant: Residual monomer","compounds_of_concern":[],"source_refs":[]}],"preferred":[{"material_id":null,"material_name":"Amalgam (silver-tin-copper-mercury alloy)","why_preferred":"","tradeoffs":"Well-established safety record (70+ years); durable; longer service life (10–20+ years). Contains mercury (concern for some populations); not tooth-colored (aesthetics); less conservative (requires more tooth removal for retention)."},{"material_id":null,"material_name":"Glass ionomer cement (GIC, resin-modified)","why_preferred":"","tradeoffs":"Fluoride-releasing (anti-cavity); biocompatible; lower cost than composite. Weaker, higher wear rate; not suitable for posterior load-bearing restorations; more translucent (limited cosmetic control)."},{"material_id":null,"material_name":"Ceramic/porcelain inlays and crowns","why_preferred":"","tradeoffs":"No monomer release; esthetic; durable (15–20+ years). Higher cost; requires more tooth removal; moisture-sensitive during cementation (composite luting agent still used, monomer exposure)."}]},"compound_composition":[{"hq_id":"hq-c-org-001718","compound_name":"Bis-GMA (bisphenol A-glycidyl methacrylate)","role":"base","typical_concentration":null}],"identifiers":{"common_names":["composite filling","tooth-colored restoration","dental sealant","resin-based sealant","mercury-free filling"],"aliases":[],"manufacturer":null,"brands":[]},"brand_examples":[{"brand":"Generic Mass-Market Brand A","manufacturer":"Consumer Products Corporation","market_position":"mass_market","notable":"Widely available mass-market option"},{"brand":"Generic Mass-Market Brand B","manufacturer":"Consumer Goods Ltd","market_position":"mass_market","notable":"Popular budget alternative"},{"brand":"Premium Brand A","manufacturer":"Premium Consumer Inc","market_position":"premium","notable":"Upscale premium positioning"},{"brand":"Professional Brand","manufacturer":"Professional Products Co","market_position":"professional","notable":"Professional/salon-grade option"},{"brand":"Specialty Eco-Brand","manufacturer":"Natural Products Ltd","market_position":"premium","notable":"Sustainable/natural product line"}],"brand_examples_disclaimer":"Representative branded products of this category. Concerning ingredients listed in materials.concerning[] apply to the category, not necessarily to every named brand. Specific formulations vary by SKU and may have changed since this record was written; consult the brand's current ingredient label before drawing brand-level conclusions.","sources":[{"id":"src_001","type":"journal","title":"BPA Release from Dental Composite Resins","year":2018},{"id":"src_002","type":"journal","title":"Urinary BPA in Children After Dental Sealants","year":2021}],"meta":{"schema_version":"4.0.0","last_updated":"2026-03-25","timestamp":"2026-05-14T01:22:07.914Z"}}