Mechanical characterisation of porous glass reinforced hydroxyapatite ceramics: Bonelike®
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Materials research (São Carlos. Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392003000300004 |
Resumo: | In the present study, mechanical properties of porous glass reinforced hydroxyapatite bioceramics were assessed by microhardness, bending and compression tests and fracture toughness determination. Porous discs were produced by a dry method using wax spheres as pore formers. Green bodies were sintered and the final microstructure of the composites consists of hydroxyapatite, alpha and beta tricalcium phosphate (alpha and <FONT FACE=Symbol>b</font>-Ca3(PO4)2)due to the reaction between the glassy phase and the hydroxyapatite matrix. The results of the mechanical tests showed that the glassy phase yielded higher fracture toughness and bending strength when comparing with literature data for single hydroxyapatite. There is a compromise between mechanical properties and the porosity level for bioceramics: for example, according to Weibull statistics for composites with 65% porosity the maximum bending stress level is 0.2 MPa for 100% survival probability whereas this stress level increases to 2.5 MPa for composites with 40%. However, only the 65% porosity composite samples seem to have the complete adequate morphology for bone ingrowth. |
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Materials research (São Carlos. Online) |
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Mechanical characterisation of porous glass reinforced hydroxyapatite ceramics: Bonelike®CaO-P2O5 glasshydroxyapatiteporous compositesbendingcompressionIn the present study, mechanical properties of porous glass reinforced hydroxyapatite bioceramics were assessed by microhardness, bending and compression tests and fracture toughness determination. Porous discs were produced by a dry method using wax spheres as pore formers. Green bodies were sintered and the final microstructure of the composites consists of hydroxyapatite, alpha and beta tricalcium phosphate (alpha and <FONT FACE=Symbol>b</font>-Ca3(PO4)2)due to the reaction between the glassy phase and the hydroxyapatite matrix. The results of the mechanical tests showed that the glassy phase yielded higher fracture toughness and bending strength when comparing with literature data for single hydroxyapatite. There is a compromise between mechanical properties and the porosity level for bioceramics: for example, according to Weibull statistics for composites with 65% porosity the maximum bending stress level is 0.2 MPa for 100% survival probability whereas this stress level increases to 2.5 MPa for composites with 40%. However, only the 65% porosity composite samples seem to have the complete adequate morphology for bone ingrowth.ABM, ABC, ABPol2003-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392003000300004Materials Research v.6 n.3 2003reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392003000300004info:eu-repo/semantics/openAccessSilva,Marcelo Henrique Prado daLemos,Alexandra FernandesFerreira,José Maria da FonteSantos,José Domingoseng2003-11-28T00:00:00Zoai:scielo:S1516-14392003000300004Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2003-11-28T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
Mechanical characterisation of porous glass reinforced hydroxyapatite ceramics: Bonelike® |
title |
Mechanical characterisation of porous glass reinforced hydroxyapatite ceramics: Bonelike® |
spellingShingle |
Mechanical characterisation of porous glass reinforced hydroxyapatite ceramics: Bonelike® Silva,Marcelo Henrique Prado da CaO-P2O5 glass hydroxyapatite porous composites bending compression |
title_short |
Mechanical characterisation of porous glass reinforced hydroxyapatite ceramics: Bonelike® |
title_full |
Mechanical characterisation of porous glass reinforced hydroxyapatite ceramics: Bonelike® |
title_fullStr |
Mechanical characterisation of porous glass reinforced hydroxyapatite ceramics: Bonelike® |
title_full_unstemmed |
Mechanical characterisation of porous glass reinforced hydroxyapatite ceramics: Bonelike® |
title_sort |
Mechanical characterisation of porous glass reinforced hydroxyapatite ceramics: Bonelike® |
author |
Silva,Marcelo Henrique Prado da |
author_facet |
Silva,Marcelo Henrique Prado da Lemos,Alexandra Fernandes Ferreira,José Maria da Fonte Santos,José Domingos |
author_role |
author |
author2 |
Lemos,Alexandra Fernandes Ferreira,José Maria da Fonte Santos,José Domingos |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Silva,Marcelo Henrique Prado da Lemos,Alexandra Fernandes Ferreira,José Maria da Fonte Santos,José Domingos |
dc.subject.por.fl_str_mv |
CaO-P2O5 glass hydroxyapatite porous composites bending compression |
topic |
CaO-P2O5 glass hydroxyapatite porous composites bending compression |
description |
In the present study, mechanical properties of porous glass reinforced hydroxyapatite bioceramics were assessed by microhardness, bending and compression tests and fracture toughness determination. Porous discs were produced by a dry method using wax spheres as pore formers. Green bodies were sintered and the final microstructure of the composites consists of hydroxyapatite, alpha and beta tricalcium phosphate (alpha and <FONT FACE=Symbol>b</font>-Ca3(PO4)2)due to the reaction between the glassy phase and the hydroxyapatite matrix. The results of the mechanical tests showed that the glassy phase yielded higher fracture toughness and bending strength when comparing with literature data for single hydroxyapatite. There is a compromise between mechanical properties and the porosity level for bioceramics: for example, according to Weibull statistics for composites with 65% porosity the maximum bending stress level is 0.2 MPa for 100% survival probability whereas this stress level increases to 2.5 MPa for composites with 40%. However, only the 65% porosity composite samples seem to have the complete adequate morphology for bone ingrowth. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003-06-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392003000300004 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392003000300004 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1516-14392003000300004 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
ABM, ABC, ABPol |
publisher.none.fl_str_mv |
ABM, ABC, ABPol |
dc.source.none.fl_str_mv |
Materials Research v.6 n.3 2003 reponame:Materials research (São Carlos. Online) instname:Universidade Federal de São Carlos (UFSCAR) instacron:ABM ABC ABPOL |
instname_str |
Universidade Federal de São Carlos (UFSCAR) |
instacron_str |
ABM ABC ABPOL |
institution |
ABM ABC ABPOL |
reponame_str |
Materials research (São Carlos. Online) |
collection |
Materials research (São Carlos. Online) |
repository.name.fl_str_mv |
Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR) |
repository.mail.fl_str_mv |
dedz@power.ufscar.br |
_version_ |
1754212657344282624 |