Can 3D surgical planning and patient specific instrumentation reduce hip implant inventory? A prospective study

3D Printing in Medicine

Johann Henckel¹  Anna Di Laura²  Harry Hothi²  Alister Hart² 

[1] The Royal National Orthopaedic Hospital, Brockley Hill, HA7 4LP, Stanmore, London, UK;The Royal National Orthopaedic Hospital, Brockley Hill, HA7 4LP, Stanmore, London, UK;Institute of Orthopaedics and Musculoskeletal Science, University College London, London, UK;

关键词: Total hip Arthroplasty;    Preoperative planning;    Three-dimensional computerised planning;    Implant cost;    Implant inventory;   

DOI  :  10.1186/s41205-020-00077-2

来源: Springer

【 摘 要 】

BackgroundModern designs of joint replacements require a large inventory of components to be available during surgery. Pre-operative CT imaging aids 3D surgical planning and implant sizing, which should reduce the inventory size and enhance clinical outcome. We aimed to better understand the impact of the use of 3D surgical planning and Patient Specific Instrumentation (PSI) on hip implant inventory.MethodsAn initial feasibility study of 25 consecutive cases was undertaken to assess the discrepancy between the planned component sizes and those implanted to determine whether it was possible to reduce the inventory for future cases. Following this, we performed a pilot study to investigate the effect of an optimized inventory stock on the surgical outcome: we compared a group of 20 consecutive cases (experimental) with the 25 cases in the feasibility study (control). We assessed: (1) accuracy of the 3D planning system in predicting size (%); (2) inventory size changes (%); (3) intra and post-operative complications.ResultsThe feasibility study showed variability within 1 size range, enabling us to safely optimize inventory stock for the pilot study. (1) 3D surgical planning correctly predicted sizes in 93% of the femoral and 89% of the acetabular cup components; (2) there was a 61% reduction in the implant inventory size; (3) we recorded good surgical outcomes with no difference between the 2 groups, and all patients had appropriately sized implants.Conclusions3D planning is accurate in up to 95% of the cases. CT-based planning can reduce inventory size in the hospital setting potentially leading to a reduction in costs.

【 授权许可】

CC BY