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Batch review performed on 17 march 2021: lot 156954: (b)(4) items manufactured and released on 08-apr-2016.Expiration date: 2021-03-22.No anomalies found related to the problem.To date, (b)(4) items of the same lot have been already sold without any similar reported event since 1-jan-2017.Additional implant involved: ball heads: cocr 01.25.012 cocr ball head 12/14 ø 28 size m 0 (k072857) lot.162046.Batch review performed on 17 march 2021: lot 162046: (b)(4) items manufactured and released on 11-may-2016.Expiration date: 2021-04-14.No anomalies found related to the problem.To date, (b)(4) items of the same lot have been already sold without any similar reported event since 1-jan-2017.Additional implant involved: cup: versafitcup cc trio 01.26.45.1148 acetabular shell cc trio no-hole ø 48 (k122911) lot.161601.Batch review performed on 06 april 2021: lot 161601: (b)(4) items manufactured and released on 20-jun-2016.Expiration date: 2021-06-08.No anomalies found related to the problem.To date, all items of the same lot have been already sold without any similar reported event since 1-jan-2017.Clinical evaluation performed by medical affairs manager: acetabular component revision performed 4.5 years after cementless total hip arthroplasty in a (b)(6) year old woman.Although no lateral projection is available, in the radiographic image provided the position of the acetabular cup appears to be inadequate.We cannot tell if this is the result of post-surgery migration or the surgeon's choice: in the latter case, no explanation for this decision was supplied.In these conditions, it is very likely that part of the femoral stem may impinge with the acetabular rim and therefore dislocation occurs.The cause of dislocation should be defined as cup position.The cause for such cup position is unknown.
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