增强型多孔生物陶瓷的制备与实验分析

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1、增强型多孔生物陶瓷的制备及实验研究inthefurnaceandgraduallyheatedto200℃to400℃gasificationtoeliminateorganicmatter,andthencontinuetoheatupto800℃to1300℃sinteringceramics．Thedenseandporousceramiccontainstwoparts．Densepartofthemajorroletoplaytoincreasethemechanicalstrength,whiletheporouspartofthemaincellandtissueingrow

2、thtoplaytheguidingroleofrevascularizationCanbeobtainedatthesametimeadequatebloodsupplynutrientstotheformationofneworganizations，thecorrespondingfunction．Theenhanceddenseceramicpartsmaycontainrnicropores，porerateof0．1％～20％．ThereinforC咖entoftheporouspartoftheporesizeof50—1000prn，porosityrateof50％to8

3、5％，withintheconnectionholediameter20—500Bin，porecommunicationrateof10％to100％．2．Theestablishmentofanimalmodels24NewZealandwhiterabbitswererandomlydividedintotwogroups：Agroupfortheexperimentalgroup，theenhancedporous13-TCPBioceramicsGroup；B，controlgroup，theporous13-TCPbioceramicsgroup．Eachgroupwere12

4、．EachrabbitunderwentbilateralfemoralIB-TCPbioeeramicimplantationintothedifferenttypesof13-TCPbioceramies．4，12，24weeksaftersurgery,fourrabbitsineachgroupwerekilledandremovesamples，retainedbackup．3．DeterminationofosteoilltegrationalabilityBonemineralcontentofbonedefectmeasured：4，12，24weeksaftersurge

5、ryanimalswerekilled，diedwithaNorlandXR-36-basedsmallanimalbonedensitymeasuringapparatusandtestsoftwareinAnimalbilateralradialbonemineralcont吼tofbonedefects．Histologicalexamination：Threegroupswere4，12and24weeksaftersurgerywiththeexecutionofairinjection1／3animals．Thesurgicalsite1／3ofthefemurwasremov

6、edandthenthesamplesafterthelongitudinalcuttinghardtissueandPonceaustainingandmorphologyobservation．一5．第二军医大学硕士学位论文4．DeterminationofbiodegradabilityThespecimenpreparationforthehardtissue，X-raymicrograph,thebasisforvariousorganizationsintheX’raydifferentinlighttransmissionbycomputerimageprocessingso

7、ftwaregivestheresult．5．DeterminationofbiomechanicaipropertiesToremovethetwoendcylindricalspecimenspolished．Measuringpressurearea,thetestpieceverticallyintheMTS855typebiomechanicaltestingmachine(USAMTS)，themeasure