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Clinical evaluation performed on 16 february 2018: partial hip revision surgery occurred 1 year and 3 months after primary cementless double mobility total hip arthroplasty.Radiographic images provided allow suboptimal evaluation of the cup position and surrounding bone status.Regions of osteolysis are visible in the equatorial region but pictures show the presence of bone adhesion on the cup surface.Aseptic loosening is a possible literature described adverse event after primary cementless tha and reasons are often unknown.In this case, the cause of failure cannot be determined.Batch review performed on 26 february 2018 lot 162385: (b)(4) items manufactured and released on 24 june 2016.Expiration date: 2021-06-15 no anomalies found related to the problem.To date, all items of the same lot have been already sold without any similar reported event.Preliminary investigation performed by r&d product manager on 02 march 2018: the mpact shown in the pictures was still explanted.The reasons of the event are unknown as it is not possible to determine the root cause from the received images.
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