Abstract: Provided is a virtual currency generation apparatus including a blockchain generator configured to generate a blockchain including a virtual currency that is generated based on a credit limit of a consumer and to update the blockchain based on payment details; an account manager configured to manage multi-signatures of a plurality of accounts sharing the blockchain; and a transaction generator configured to store a transaction condition corresponding to each of the plurality of accounts and to proceed with a payment using the virtual currency based on the transaction condition.

Abstract: A method for inducing periodontal regeneration including soft tissue, cementum, and bone regeneration, resulting in a type of healing characteristic of the anatomy and architecture of the undiseased tissue, comprising treating the surface of the damaged root with a demineralizing agent, and then applying a growth factor directly to the treated bone surface.