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em 1999, o médico e pesquisador russo marlen sulamanidze desenvolveu e patenteou um fio de poliuretano aptos-antiptose com garras falhadas, para sustentação da face e utilizou-o para fins estéticos, senso conhecido como "fio russo".
in 1999, the russian physician and researcher marlen sulamanidze developed and patented a polyurethane thread aptos anti-ptosis with barbs for face support and used it for aesthetic purposes, it being known as the "russian thread."