Direct manufacture of hydroxyapatite scaffolds using blue laser
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Materials Science Forum
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The study deals with the direct manufacturing of hydroxyapatite scaffolds using selective
polymerization of the slurry liquid phase. The bovine hydroxyapatite has great similarity with the
human bone structure, making it able for a direct connection with the bone tissues. This study aims
to obtain scaffolds using a new technique of rapid prototyping, obtained by polymerization of
acrylic resin (liquid phase of slurry) by ultraviolet light present in a range of the band spectrum
emitted by the blue laser light. Sub-micrometer hydroxyapatite was obtained by the calcination and
grinding of bovine bone in a vibratory mill. Mixtures of hydroxyapatite and resin were prototyped
in three-dimensional pieces and sintered afterword and subjected to blue laser emission path
directed in a CNC equipment. Grounded particles obtained in the grinding vibratory mill, with
equivalent diameter of 0.35 microns, were reactive enough to compensate the low green
densification bellow 50 vol%. Polymerization tests realized indicated that the incidence of the laser
with fluency of 170 mW.s/mm2 promoted the curing of the 0.5 mm diameter pieces in depth about
0.5 mm, which allowed the prototyping of the scaffolds with sufficient mechanical strength for
handling.
Como referenciar
MEIRA, CAMILA R. de; GOMES, DANNYLO T.; BRAGA, FRANCISCO J.C.; PURQUERIO, BENEDITO de M.; FORTULAN, CARLOS A. Direct manufacture of hydroxyapatite scaffolds using blue laser. Materials Science Forum, v. 805, p. 128-133, 2015. DOI: 10.4028/www.scientific.net/MSF.805.128. Disponível em: http://repositorio.ipen.br/handle/123456789/27683. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.