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Development of a solvent-free polylactide/calcium carbonate composite for selective laser sintering of bone tissue engineering scaffolds.
Gayer, Christoph; Ritter, Jessica; Bullemer, Martin; Grom, Stefanie; Jauer, Lucas; Meiners, Wilhelm; Pfister, Andreas; Reinauer, Frank; Vucak, Marijan; Wissenbach, Konrad; Fischer, Horst; Poprawe, Reinhart; Schleifenbaum, Johannes Henrich.
Afiliación
  • Gayer C; Fraunhofer Institute for Laser Technology ILT, Steinbachstrasse 15, 52074 Aachen, Germany. Electronic address: christoph.gayer@ilt.fraunhofer.de.
  • Ritter J; Department of Dental Materials and Biomaterials Research, RWTH Aachen University Hospital, Pauwelsstrasse 30, 52074 Aachen, Germany.
  • Bullemer M; EOS GmbH, Robert-Stirling-Ring 1, 82152 Krailling/Munich, Germany. Electronic address: martin.bullemer@amcm.com.
  • Grom S; Karl Leibinger Medizintechnik GmbH & Co. KG, Kolbinger Strasse 10, 78570 Mühlheim/Donau, Germany. Electronic address: stefanie.grom@klsmartin.com.
  • Jauer L; Fraunhofer Institute for Laser Technology ILT, Steinbachstrasse 15, 52074 Aachen, Germany. Electronic address: lucas.jauer@ilt.fraunhofer.de.
  • Meiners W; Fraunhofer Institute for Laser Technology ILT, Steinbachstrasse 15, 52074 Aachen, Germany. Electronic address: wilhelm.meiners@trumpf.com.
  • Pfister A; EOS GmbH, Robert-Stirling-Ring 1, 82152 Krailling/Munich, Germany. Electronic address: andreas.pfister@eos.info.
  • Reinauer F; Karl Leibinger Medizintechnik GmbH & Co. KG, Kolbinger Strasse 10, 78570 Mühlheim/Donau, Germany. Electronic address: frank.reinauer@klsmartin.com.
  • Vucak M; SCHAEFER KALK GmbH & Co. KG, Louise-Seher-Strasse 6, 65582 Diez, Germany. Electronic address: marijan.vucak@schaeferkalk.de.
  • Wissenbach K; Fraunhofer Institute for Laser Technology ILT, Steinbachstrasse 15, 52074 Aachen, Germany. Electronic address: konrad.wissenbach@ilt.fraunhofer.de.
  • Fischer H; Department of Dental Materials and Biomaterials Research, RWTH Aachen University Hospital, Pauwelsstrasse 30, 52074 Aachen, Germany. Electronic address: hfischer@ukaachen.de.
  • Poprawe R; RWTH Aachen University - Chair for Laser Technology LLT, Steinbachstrasse 15, 52074 Aachen, Germany. Electronic address: reinhart.poprawe@llt.rwth-aachen.de.
  • Schleifenbaum JH; RWTH Aachen University - Digital Additive Production DAP, Steinbachstrasse 15, 52074 Aachen, Germany. Electronic address: johannes.henrich.schleifenbaum@dap.rwth-aachen.de.
Mater Sci Eng C Mater Biol Appl ; 101: 660-673, 2019 Aug.
Article en En | MEDLINE | ID: mdl-31029360
Since large bone defects cannot be healed by the body itself, continuous effort is put into the development of 3D scaffolds for bone tissue engineering. One method to fabricate such scaffolds is selective laser sintering (SLS). However, there is a lack of solvent-free prepared microparticles suitable for SLS. Hence, the aim of this study was to develop a solvent-free polylactide/calcium carbonate composite powder with tailored material properties for SLS. Four composite powders with a composition of approximately 75 wt% polylactide (PLLA as well as PDLLA) and 25 wt% calcium carbonate (calcite) were prepared by a milling process based on GMP standards. Four different grades of polylactide were chosen to cover a broad inherent viscosity range of 1.0-3.6 dl/g. The composite material with the lowest inherent viscosity (1.0 dl/g) showed the best processability by SLS. This was caused by the small polymer particle diameter (50 µm) and the small zero-shear melt viscosity (400 Pa·s), which led to fast sintering. The SLS process parameters were developed to achieve low micro-porosity (approx. 2%) and low polymer degradation (no measurable decrease of the inherent viscosity). A biaxial bending strength of up to 75 MPa was achieved. Cell culture assays indicated good viability of MG-63 osteoblast-like cells on the SLS specimens. Finally, the manufacture of 3D scaffolds with interconnected pore structure was demonstrated. After proving the biocompatibility of the material, the developed scaffolds could have great potential to be used as patient-specific bone replacement implants.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Poliésteres / Materiales Biocompatibles / Carbonato de Calcio / Ingeniería de Tejidos / Andamios del Tejido Límite: Humans Idioma: En Revista: Mater Sci Eng C Mater Biol Appl Año: 2019 Tipo del documento: Article Pais de publicación: Países Bajos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Poliésteres / Materiales Biocompatibles / Carbonato de Calcio / Ingeniería de Tejidos / Andamios del Tejido Límite: Humans Idioma: En Revista: Mater Sci Eng C Mater Biol Appl Año: 2019 Tipo del documento: Article Pais de publicación: Países Bajos