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Approach for Rapid Fabrication of Individual Bone Replacement Structures by Designing Additively Prefabricated CPC Models

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Innovative Product Development by Additive Manufacturing 2022 (IPDAM 2022)

Abstract

Customized bone replacement structures offer the potential to build up missing bone areas. However, additive manufacturing of calcium phosphate cement (CPC) structures is limited due to the material behavior. The aim is to separate the functionalization and shaping. Thus, prefabricated CPC-prefabs, which show different porosity as functionalization, are to be manufactured additively. The individual shaping will be carried out by milling (CAD/CAM). Several CPC-prefabs are developed, which differ in the mapping of the transition geometry from porous to dense phase as well as in the overall size. Therefore, categorized datasets of mandibular scans are analyzed and the cross-sectional contour of the bone is determined. Mathematical regression is used to determine a parametrically described average contour, which is used to design the prefab models. First single phase prefab demonstrators have been additively manufactured and subjected to initial milling tests. The feasibility in principle of the intended process has thus been demonstrated.

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Acknowledgements

This work is funded by the German Federal Ministry for Economic Affairs and Climate Action (reference: KK5366401BM1).

The authors further thank INNOTERE GmbH (Radebeul, Germany) for providing and producing the printed CPC structures.

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Correspondence to P. Sembdner .

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© 2023 The Author(s), under exclusive license to Springer Nature Switzerland AG

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Sembdner, P. et al. (2023). Approach for Rapid Fabrication of Individual Bone Replacement Structures by Designing Additively Prefabricated CPC Models. In: Lachmayer, R., Bode, B., Kaierle, S. (eds) Innovative Product Development by Additive Manufacturing 2022. IPDAM 2022. Springer, Cham. https://doi.org/10.1007/978-3-031-27261-5_5

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  • DOI: https://doi.org/10.1007/978-3-031-27261-5_5

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-031-27260-8

  • Online ISBN: 978-3-031-27261-5

  • eBook Packages: EngineeringEngineering (R0)

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