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Treatment of femoral neck fractures using actis stem: complication rate in 188 uncemented hemiarthroplasties.

INTRODUCTION: Cemented hemiarthroplasty (HA) is preferred in treating dislocated femoral neck fractures in elderly, osteoporotic patients, since uncemented HA was associated with mechanical complications more frequently. Cementation can conversely cause cardiopulmonary complications, leading to demand on safe, uncemented implants addressing osteoporosis. This study is set up as a retrospective feasibility study on the use of an uncemented, collared wedge implant (Actis®, DePuy Synthes, Warsaw, IN), for HA in elderly patients, focusing on complication rate.

MATERIALS AND METHODS: From 1,194 patients, treated with HA in two study centers between 2017-2022, 188 received Actis® uncemented stem with bipolar head. Complete follow-up were retrospectively collected in all patients.

RESULTS: In 188 patients (f: 64.9%; age: 83.1 ± 7.7a) included, no case of intra-operative mortality was recorded. 2 day mortality was 1.1%, 30 day mortality was 7.4% and 1 year mortality was 28.2%. 2 (1.1%) intra-operative fractures did not receive surgical revision, 3 (1.6%) post-operative periprosthetic fractures caused separate admission and revision. 2 cases (1.1%) of early infection required surgical revision.

CONCLUSION: Our data provide proof of concept, that Actis® Stem allows an alternative, uncemented treatment option for displaced femoral neck fractures with HA. In case of preoperative or intraoperative medial cortical bone defects, stability of this implant is deteriorated.

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