Characterization of titanium surface modified by calcium titanate
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2019
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INTERNATIONAL MATERIALS RESEARCH CONGRESS, 28th
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Coatings based on apatite and others that contain calcium play an important role for the
osseointegration with the implant. It is believed that released calcium induces a specific biological
response to the living tissue establishing a stable chemical bonding between formed bone and
implants. The mechanical anchorage of implants also depends on the surface structure and
morphology. In this work, the titanium surface was modified by calcium titanate, which was
deposited by sol-gel method combined to the dip coating technique followed by heat treatments.
Two different emersion rate (5 and 10 cm/min) were used as well as the number of coatings were
varied. The temperature of this treatment was established based on the results of the thermal
analysis (TG/DTA). The surfaces were characterized by X-ray diffractometry (DRX), Scanning Electron
Microscopy (SEM) and water contact angle measurement. The corrosion behavior of modified surfaces
was evaluated by electrochemical method (polarization curves) in balanced saline Hanks solution.
Finally, biological test was carried out by the analysis of cellular viability and adhesion of MC3T3-E1
(subclone 4), mouse pre-osteoblastic cells (ATCC CRL-2593), using MTT and crystal violet assays,
respectively, after 24h incubation at 37oC in 5% CO2 atmosphere. The coating consists of anatase TiO2
(PDF 21-1272) and calcium titanate (CaTiO3, PDF 43-226). SEM analysis showed that homogeneous
films with 0.8μm of thickness are provided when they are prepared by only one immersion and that
the films increase the resistence to corrosion. The coating increases the wettability as the water
contact angle decreases from 90o±10o for cp Ti (low interstitial titanium) to 34 o±5o. The biological test
shows that the modifications do not interfere on the osteoblast viability and adhesion, however, the
morphological analysis of preosteoblasts cultured on the modified Ti-surface by SEM shows that the
coatings promote a cell spreading.
Como referenciar
SAEKI, MARGARIDA J.; GARCIA, JOÃO I.M.M.; FERNANDES, CELIO J.C.; ROSSI, MARIANA C.; SILVA, WILLIAM de M.; MARTINEZ, LUIS G.; ZAMBUZZI, WILLIAN F. Characterization of titanium surface modified by calcium titanate. In: INTERNATIONAL MATERIALS RESEARCH CONGRESS, 28th, August 18-23, 2019, Cancun, México. Abstract... Ciudad de México, México: Sociedad Mexicana de Materiales, 2019. Disponível em: http://repositorio.ipen.br/handle/123456789/31008. Acesso em: 25 Apr 2024.
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.