The use of an Ossis custom 3D-printed tri-flanged acetabular implant for major bone loss: minimum 2-year follow-up

Abstract

The mid-term results of the Ossis custom 3D-printed tri-flanged acetabular implant for the management of severe acetabular defects are encouraging. The improvement in functional scores and radiographic outcomes are comparable to similar designs. In addition, no cases have required revision for aseptic loosening.

Results of the acetabular custom-made implants usage in extensive acetabular deficiency. Literature review

“…In 17 out of 18 studies analyzed by Chiarlone [4] pre-operative bone defects were classified according Paprosky or AAOS system and in the most cases the grade of bone loss was classified as type IIIA-IIIB or AAOS III-IV. In one case the bone defects were minor classified as IIA-IIB [22]. One study did not mention any classification or grade of bone loss [23].…”

“…It is difficult to make a reliable comparison of the clinical results in the literature due to differences in classification, types of acetabular bone defect, implant features, numbers of patients, number of previous surgeries and revisions and various indications for surgery. Clinical results were summarized by Chiarlone [4] in a review in which 18 publications [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] were taken into account and included 627 patients in total (634 hips). The studies showed good clinical and radiological outcomes of custom-made acetabular implants with 94.0 ± 5.0% survival rate.…”

“…Dislocation was the main indication for re-operation (11.5 ± 10.7%). In all studies [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] clinical evaluation using Harris Hip Score was performed and the mean was 76.1 ± 8.6. In 17 out of 18 studies analyzed by Chiarlone [4] pre-operative bone defects were classified according Paprosky or AAOS system and in the most cases the grade of bone loss was classified as type IIIA-IIIB or AAOS III-IV.…”

“…The treatment of a massive acetabular deficiency classified in publications as Paprosky Type IIIA-B or type III-IV according to American Academy of Orthopaedic Surgeons [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] is a complex problem. The acetabular custom-made implants seem to open up new opportunities.…”

Mid-term Outcomes of Using Custom-Made Implants for Revision Hip Arthroplasty

“…по данным литературы, использование индивидуальных трехфланцевых вертлужных компонентов и конструкций типа «конуса мороженого» сопровождаются более высоким уровнем осложнений и неудовлетворительных результатов. Вероятно, это связано, в первую очередь, с применением таких имплантатов в наиболее сложных случаях ревизии вертлужного компонента [14,15,16,31]. Но существует и другая проблема -нарушение позиционирования индивидуальных конструкций [32,33], которое может потенциально ограничить зону контакта с костью.…”