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Extrusion-Based 3D Printing of Calcium Magnesium Phosphate Cement Pastes for Degradable Bone Implants
Please always quote using this URN: urn:nbn:de:bvb:20-opus-246110
- This study aimed to develop printable calcium magnesium phosphate pastes that harden by immersion in ammonium phosphate solution post-printing. Besides the main mineral compound, biocompatible ceramic, magnesium oxide and hydroxypropylmethylcellulose (HPMC) were the crucial components. Two pastes with different powder to liquid ratios of 1.35 g/mL and 1.93 g/mL were characterized regarding their rheological properties. Here, ageing over the course of 24 h showed an increase in viscosity and extrusion force, which was attributed to structuralThis study aimed to develop printable calcium magnesium phosphate pastes that harden by immersion in ammonium phosphate solution post-printing. Besides the main mineral compound, biocompatible ceramic, magnesium oxide and hydroxypropylmethylcellulose (HPMC) were the crucial components. Two pastes with different powder to liquid ratios of 1.35 g/mL and 1.93 g/mL were characterized regarding their rheological properties. Here, ageing over the course of 24 h showed an increase in viscosity and extrusion force, which was attributed to structural changes in HPMC as well as the formation of magnesium hydroxide by hydration of MgO. The pastes enabled printing of porous scaffolds with good dimensional stability and enabled a setting reaction to struvite when immersed in ammonium phosphate solution. Mechanical performance under compression was approx. 8–20 MPa as a monolithic structure and 1.6–3.0 MPa for printed macroporous scaffolds, depending on parameters such as powder to liquid ratio, ageing time, strand thickness and distance.…
Author: | Lisa-Marie Götz, Katharina Holeczek, Jürgen GrollORCiD, Tomasz JüngstORCiD, Uwe Gbureck |
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URN: | urn:nbn:de:bvb:20-opus-246110 |
Document Type: | Journal article |
Faculties: | Medizinische Fakultät / Abteilung für Funktionswerkstoffe der Medizin und der Zahnheilkunde |
Language: | English |
Parent Title (English): | Materials |
ISSN: | 1996-1944 |
Year of Completion: | 2021 |
Volume: | 14 |
Issue: | 18 |
Article Number: | 5197 |
Source: | Materials 2021, 14(18), 5197; https://doi.org/10.3390/ma14185197 |
DOI: | https://doi.org/10.3390/ma14185197 |
Dewey Decimal Classification: | 6 Technik, Medizin, angewandte Wissenschaften / 61 Medizin und Gesundheit / 610 Medizin und Gesundheit |
Tag: | degradable implant; extrusion-based 3D printing; magnesium phosphate cement |
Release Date: | 2022/01/17 |
Date of first Publication: | 2021/09/10 |
Open-Access-Publikationsfonds / Förderzeitraum 2021 | |
Licence (German): | CC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International |