Article3D printing in medicine2020
The effect of metal artefact on the design of custom 3D printed acetabular implants.
Article in 3D printing in medicine, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 9 citations in OpenAlex.
- Assessment of Custom-Made Acetabular Implants for Complex Revision Total Hip Arthroplasty: A Concise Follow-up, at a Minimum of 5 Years.The Journal of bone and joint surgery. American volume · 2026Article
- Biomechanical comparison between custom-made enhanced triflange and quadri-flange acetabular components for the treatment of Paprosky IIIB acetabular bone defects.Bone & joint research · 2025Article
- Blood titanium levels in patients with large and sliding titanium implants.BMC musculoskeletal disorders · 2022Article
- Shape suitability and mechanical safety of customised hip implants: Three-dimensional printed acetabular cup for hip arthroplasty.Journal of orthopaedicsArticle
- Custom 3D-Printed Implants for Acetabular Reconstruction: Intermediate-Term Functional and Radiographic Results.JB & JS open accessArticle
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Authors and funding
5 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
background3D Printed custom-made implants constitute a viable option in patients with acetabular Paprosky III defects. In these patients, needing complex hip revision surgery, the appreciation of the bony defect is crucial to assure stable fixation of the customised implant, often intended to replace a failed one. We aimed to understand the effect of metal artefact on the design of customised implants.
methods26 patients with massive acetabular defects were referred, between May 2016 and September 2018, to our institution classified as "un-reconstructable" by other hospitals. They all received custom 3D-printed acetabular cups. A subset of them underwent two-stage revision surgery due to infection. We then extended the two-stage procedure to the cases where metal artefacts were significantly affecting the reading of the CT scans. CT scans of patients' pelvises were taken pre and post-implant removal. We assessed for changes in bony shape and volume of the pelvis using 3D imaging software and quantified the effect on implant design with CAD software.
resultsEight (out of 26) patients (31%) underwent two-stage revision surgery. The CT bony reconstructions between the two timepoints changed in all cases. The changes were mostly associated to the shape and distribution of the acetabular defects. Three of these cases (37.5%) showed a remarkable difference in the remaining bone that led to a change in implant design. So far, there has been no difference in the clinical outcome between the patients who underwent single (n = 18) and two-stage surgery (n = 8).
conclusionsThe shape of the acetabulum reconstructed from CT data is potentially altered by metal artefact and bone excised during removal of the failed component. For "end-of-road" acetabular reconstruction, we recommend surgeons consider the use of two-stage surgery to enable a reliable fitting of the complex shape of 3D-printed implants.
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