This is the part most patients never get told, and it is the part worth knowing.
Breast implants sold in Brazil must be registered with ANVISA and must meet the international standard ISO 14607. Imported silicone implants additionally require compulsory certification through Brazil's conformity assessment system, administered by Inmetro — a regime tightened deliberately after the PIP and Rofil scandals, in which implants made with unapproved silicone reached patients in several countries.
More usefully for you: Brazilian law requires the manufacturer to supply traceability labels with every implant, carrying the serial number and the ANVISA registration number. At least three are provided — one for your clinical record, one for the billing documentation, and one that goes to you. ANVISA is explicit that this is a patient right, not a courtesy.
So you should leave Brazil knowing exactly what was implanted: brand, model, lot, serial number and registration number. If a specific brand or batch is ever suspended — and ANVISA does suspend them, and publishes the alerts — you can check your own label against it rather than wondering.