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.
Highlights
New technologies in Traumatology AND OrthopedicsУвеличивается число пациентов с тяжелыми разрушениями вертлужной впадины, у которых достижение стабильности эндопротеза становится трудной или недостижимой задачей
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
Revision Total Hip Arthroplasty Using Tantalum Augment in Patients with Paprosky III or IV Acetabular Bone Defects: A Minimum 2-year Follow Up Study
Summary
Увеличивается число пациентов с тяжелыми разрушениями вертлужной впадины, у которых достижение стабильности эндопротеза становится трудной или недостижимой задачей. В таких случаях возникают показания к печати индивидуального трехфланцевого вертлужного компонента. Среди наших пациентов было 2 женщины и 1 мужчина, их средний возраст составил 60,3±19,4 лет (от 38 до 78 лет). Средний балл по шкале Харриса у 3 пациентов перед операцией составил 27,13, а после операции 74,1, что свидетельствует о значительном улучшении уже через 3 месяца после имплантации индивидуальных вертлужных компонентов. У одной пациентки имелись сложности с имплантацией индивидуального компонента, поскольку фланцы помешали обеспечить достаточную дистракцию таза. Учитывая увеличение количества пациентов с тяжелыми разрушениями вертлужной впадины, 3D-технологии изготовления индивидуальных вертлужных компонентов заслуживают широкого применения, что улучшит качество лечения таких больных.
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