Loss of Mass and Surface Topography in 3-Dimensional-Printed Solid Titanium Cages Upon Impaction: An In Vitro Model
Objective There is increased use of 3-dimensional (3D)-printing for manufacturing of interbody cages to create microscale surface features that promote bone formation. Those features may be vulnerable to abrasion and/or delamination during cage impaction. Our objective was to quantify loss of mass a...
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Korean Spinal Neurosurgery Society
2025-03-01
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| Series: | Neurospine |
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| Online Access: | http://e-neurospine.org/upload/pdf/ns-2448990-495.pdf |
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| author | Tien Tran Ian M Singleton Victor Ungurean Jr Andrea Rowland Anna Martin Oluwatodimu Richard Raji Dimitriy G. Kondrashov |
| author_facet | Tien Tran Ian M Singleton Victor Ungurean Jr Andrea Rowland Anna Martin Oluwatodimu Richard Raji Dimitriy G. Kondrashov |
| author_sort | Tien Tran |
| collection | DOAJ |
| description | Objective There is increased use of 3-dimensional (3D)-printing for manufacturing of interbody cages to create microscale surface features that promote bone formation. Those features may be vulnerable to abrasion and/or delamination during cage impaction. Our objective was to quantify loss of mass and changes in surface topography of 3D-printed titanium interbody cages due to surgical impaction. Methods Eight surfaces of four 3D-printed titanium modular interbody fusion cages were tested. The cages were impacted into the Sawbones model with compression preload of either 200N or 400N using a guided 1-lb (0.45 kg) drop weight. Mass and surface roughness parameters of each endplate were recorded and compared for differences. Results Significant weight loss was observed for the superior endplate group and for both 200N and 400N preloads. For pooled data comparison, significant postimpaction decreases were observed for mean roughness, root-mean-squared roughness, mean roughness depth, and total height of roughness profile. No significant differences were observed for profile skewness and kurtosis. There were significant changes in almost all roughness parameters in the anterior region of the cage postimpaction with significant changes in 2 out of 6 parameters in the middle, posterior, and central regions postimpaction. Conclusion Three-dimensional-printed titanium interbody fusion cages underwent loss of mass and alteration in surface topography during benchtop testing replicating physiologic conditions. There was an endplate- and region-specific postimpaction change in roughness parameters. The anterior surface experienced the largest change in surface parameters postimpaction. Our results have implications for future cage design and pre-approval testing of 3D-printed implants. |
| format | Article |
| id | doaj-art-c1c88f91ad1a4c84af4e8fa8c6d4c45b |
| institution | DOAJ |
| issn | 2586-6583 2586-6591 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Korean Spinal Neurosurgery Society |
| record_format | Article |
| series | Neurospine |
| spelling | doaj-art-c1c88f91ad1a4c84af4e8fa8c6d4c45b2025-08-20T03:06:14ZengKorean Spinal Neurosurgery SocietyNeurospine2586-65832586-65912025-03-0122117318410.14245/ns.2448990.4951674Loss of Mass and Surface Topography in 3-Dimensional-Printed Solid Titanium Cages Upon Impaction: An In Vitro ModelTien Tran0Ian M Singleton1Victor Ungurean Jr2Andrea Rowland3Anna Martin4Oluwatodimu Richard Raji5Dimitriy G. Kondrashov6 The Taylor Collaboration, San Francisco, CA, USA San Francisco Orthopaedic Residency Program, San Francisco, CA, USA The Taylor Collaboration, San Francisco, CA, USA San Francisco Orthopaedic Residency Program, San Francisco, CA, USA San Francisco Orthopaedic Residency Program, San Francisco, CA, USA The Taylor Collaboration, San Francisco, CA, USA San Francisco Orthopaedic Residency Program, San Francisco, CA, USAObjective There is increased use of 3-dimensional (3D)-printing for manufacturing of interbody cages to create microscale surface features that promote bone formation. Those features may be vulnerable to abrasion and/or delamination during cage impaction. Our objective was to quantify loss of mass and changes in surface topography of 3D-printed titanium interbody cages due to surgical impaction. Methods Eight surfaces of four 3D-printed titanium modular interbody fusion cages were tested. The cages were impacted into the Sawbones model with compression preload of either 200N or 400N using a guided 1-lb (0.45 kg) drop weight. Mass and surface roughness parameters of each endplate were recorded and compared for differences. Results Significant weight loss was observed for the superior endplate group and for both 200N and 400N preloads. For pooled data comparison, significant postimpaction decreases were observed for mean roughness, root-mean-squared roughness, mean roughness depth, and total height of roughness profile. No significant differences were observed for profile skewness and kurtosis. There were significant changes in almost all roughness parameters in the anterior region of the cage postimpaction with significant changes in 2 out of 6 parameters in the middle, posterior, and central regions postimpaction. Conclusion Three-dimensional-printed titanium interbody fusion cages underwent loss of mass and alteration in surface topography during benchtop testing replicating physiologic conditions. There was an endplate- and region-specific postimpaction change in roughness parameters. The anterior surface experienced the largest change in surface parameters postimpaction. Our results have implications for future cage design and pre-approval testing of 3D-printed implants.http://e-neurospine.org/upload/pdf/ns-2448990-495.pdfinterbody cageanterior lumbar interbody fusionthree-dimensional-printed titaniumsurface topographyroughnessimplant design |
| spellingShingle | Tien Tran Ian M Singleton Victor Ungurean Jr Andrea Rowland Anna Martin Oluwatodimu Richard Raji Dimitriy G. Kondrashov Loss of Mass and Surface Topography in 3-Dimensional-Printed Solid Titanium Cages Upon Impaction: An In Vitro Model Neurospine interbody cage anterior lumbar interbody fusion three-dimensional-printed titanium surface topography roughness implant design |
| title | Loss of Mass and Surface Topography in 3-Dimensional-Printed Solid Titanium Cages Upon Impaction: An In Vitro Model |
| title_full | Loss of Mass and Surface Topography in 3-Dimensional-Printed Solid Titanium Cages Upon Impaction: An In Vitro Model |
| title_fullStr | Loss of Mass and Surface Topography in 3-Dimensional-Printed Solid Titanium Cages Upon Impaction: An In Vitro Model |
| title_full_unstemmed | Loss of Mass and Surface Topography in 3-Dimensional-Printed Solid Titanium Cages Upon Impaction: An In Vitro Model |
| title_short | Loss of Mass and Surface Topography in 3-Dimensional-Printed Solid Titanium Cages Upon Impaction: An In Vitro Model |
| title_sort | loss of mass and surface topography in 3 dimensional printed solid titanium cages upon impaction an in vitro model |
| topic | interbody cage anterior lumbar interbody fusion three-dimensional-printed titanium surface topography roughness implant design |
| url | http://e-neurospine.org/upload/pdf/ns-2448990-495.pdf |
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