The invention relates to a kitten comprising a ring supporting a crimping member of a decorative member arranged radially in a groove in a base of a decorative article. According to the invention, the kitten comprises a circular throat arranged to accommodate a branch made of a shape memory alloy, which can undergo reversible transformation, and the branch can be moved from its contracted position at the throat, Toward a deployment position, wherein the connector extends at least partially out of the throat to hold the kitten in the matrix.
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