CUSTOMIZED ACETABULAR COMPONENTS IN REVISION HIP ARTHROPLASTY

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Abstract

In recent years, there is a trend of increasing demand for revision hip arthroplasty. Among these patients there are many with complex acetabular defects, including patients with pelvic discontinuity. To ensure stability for revised acetabular components in such cases becomes a challenging or unachievable task. Such defects give indications for printing customized tri-flange acetabular component. The authors analysed own experience of creating and applying custom made acetabular components in 3 patients with complex acetabular defects. Material and methods. Among the patients there were 2 women and 1 man. Average age was 60,3±19,4 years (38 to 78 years). Two patients had III B defects with pelvic discontinuity and one patient had III A defect by Paprosky classification. As the first step, the authors in collaboration with engineers printed a plaster full size pelvic 3D model, as the second step a customized tri-flange acetabular component was designed and printed. Harris Hip Score was evaluated preoperatively and 3 months postoperatively. Results. Average follow-up period was 5,3±2,5 months (3 to 8 months). The authors observed no cases of implant loosening, dislocation or deep periprosthetic infection. Average Harris Hip Score before surgery was 27,13 and after surgery – 74,1 indicating a significant improvement in 3 months postoperatively. Conclusion. Indications for use of individual acetabular components in reported patients correspond to indications formulated by Berasi et al. The authors obtained encouraging early follow-up outcomes that correspond to data of other authors. In one patient certain difficulties were reported due to insufficient pelvic distraction. Component’s flanges prevented achieving adequate pelvic distraction. Nevertheless, good primary stability was achieved. Modern software and 3D metal printers can significantly reduce the production cost of customized acetabular components. Application of this technology can be widened to various orthopaedic centres and will undoubtedly improve the quality of treatment for such patients.

About the authors

G. M. Kavalersky

I. M. Sechenov First Moscow State Medical University
8-2, ul. Trubetskaya, Moscow, 119991, Russia

Author for correspondence.
Email: yar.rukin@gmail.com
Dr. Sci. (Med) Professor, Cheaf of Department of Traumatology, Orthopaedics and Disaster Surgery Russian Federation

V. Yu. Murylev

I. M. Sechenov First Moscow State Medical University
8-2, ul. Trubetskaya, Moscow, 119991, Russia
S.P. Botkin Moscow City Clinical Hospital
5, 2-nd Botkinskiy proezd, Moscow, 125284, Russia

Email: yar.rukin@gmail.com
Dr. Sci. (Med) Professor, Professor of Department of Traumatology, Orthopaedics and Disaster Surgery Russian Federation

Y. A. Rukin

I. M. Sechenov First Moscow State Medical University
8-2, ul. Trubetskaya, Moscow, 119991, Russia

Email: yar.rukin@gmail.com
Cand. Sci. (Med) Assistant Professor of Department of Traumatology, Orthopaedics and Disaster Surgery Russian Federation

A. V. Lychagin

I. M. Sechenov First Moscow State Medical University
8-2, ul. Trubetskaya, Moscow, 119991, Russia

Email: yar.rukin@gmail.com
Cand. Sci. (Med) assistant Professor of Department of Traumatology, Orthopaedics and Disaster Surgery Russian Federation

P. M. Elizarov

I. M. Sechenov First Moscow State Medical University
8-2, ul. Trubetskaya, Moscow, 119991, Russia
S.P. Botkin Moscow City Clinical Hospital
5, 2-nd Botkinskiy proezd, Moscow, 125284, Russia

Email: yar.rukin@gmail.com
Cand. Sci. (Med) Assistant Professor of Department of Traumatology, Orthopaedics and Disaster Surgery Russian Federation

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CrossRef: 7

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