Use of 3D Cups in Severe Acetabular Defects

Introduction: Given the increase in hip arthroplasties in the last century, serious acetabular defects are increasingly frequent events. Its treatment represents a real challenge, due to the deficit and poor bone quality, which these patients usually have.
Materials and Methods: Six patients treated between 2016 and 2021 are presented. Five cases of pelvic disruption due to failed revisions, classified as Paprosky type IIIB, and one transverse fracture of the acetabulum, a possible treatment option in cases of osteoporotic patients.
Results: The patients treated with this multidisciplinary technique were followed up for an average of 20 months, none of them presented postoperative complications. The results evaluated by analogous scales are promising and invite us to establish this procedure as the gold standard.
Conclusions: Strict evaluation is necessary in acetabular defects. The inclusion of medical informatics engineering makes it possible to manufacture custom-made multiporous trabecular titanium/tantalum implants, which is ideal for achieving osseointegration, added to the possibility of planning the direction and length of screws to the remaining bone, according to its quality. Cementing a double mobility cup inside the customized implant reduces the risk of dislocation and overloading of the latter, by eliminating metal-metal friction.

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The authors declare no conflict of interest.

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The datasets used in this study are openly available at [repository link] and the source code is available on GitHub at [GitHub link].

This work did not receive any external funding.