簡介:TIBIALCOMPONENTFIXATIONWITHAPERIAPATITECOATINGEVALUATIONBYRADIOSTEREOMETRICANALYSISINACANINETOTALKNEEARTHROPLASTYMODELMATTHEWJALLEN,VETMB,PHD,YKENDALLALEONE,BS,YMICHAELJDUNBAR,MD,PHD,ZAMOSRACE,PHD,YPAULAFROSENBAUM,PHD,§ANDJONATHANMSACKS,MS,MBA∥ABSTRACTCEMENTLESSFIXATIONFORTHETIBIALCOMPONENTINTOTALKNEEARTHROPLASTYTKAREMAINSPROBLEMATICPERIAPATITEPA,ASOLUTIONDEPOSITEDHYDROXYAPATITE,ISUNDERINVESTIGATIONASANOPTIONFORIMPROVINGTHEFIXATIONOFCEMENTLESSTIBIALCOMPONENTSINTHISSTUDY,RADIOSTEREOMETRICANALYSISWASUSEDTODOCUMENTIMPLANTMIGRATIONIN48DOGSTHATUNDERWENTTKAWITHCEMENTLESS,PACOATED,ORCEMENTEDTIBIALCOMPONENTSMIGRATIONAT12WEEKSWASSIMILARINTHE2GROUPSAT12MONTHS,THEREWASGREATERMIGRATIONINTHEPACOATEDGROUP,BUTTHEDIFFERENCEBETWEENTHE2GROUPSWASBELOWTHETHRESHOLDCONSIDEREDCLINICALLYSIGNIFICANTINTHISCANINETKAMODEL,CEMENTLESSFIXATIONWITHPAPERFORMEDLESSWELLTHANDIDCEMENTEDFIXATION,BUTNOTTOADEGREETHATWOULDMAKEACLINICALDIFFERENCEINTHESHORTTERMKEYWORDSIMPLANTMIGRATION,DOG,ARTHROPLASTY,BONECEMENT,HYDROXYAPATITE?2012ELSEVIERINCALLRIGHTSRESERVEDCEMENTLESSFIXATIONOFFERSSIGNIFICANTPOTENTIALADVANTAGESOVERCEMENTEDFIXATIONFORTOTALJOINTARTHROPLASTYINADDITIONTOTHEELIMINATIONOFBONECEMENTASASOURCEOFPARTICULATEDEBRIS13,CEMENTLESSFIXATIONISMOREAMENABLETOMINIMALLYINVASIVESURGICALAPPROACHESANDBETTERPRESERVESPERIPROSTHETICBONESTOCKATTHETIMEOFSURGERY4,5WITHTHECURRENTTRENDTOWARDPERFORMINGTOTALJOINTARTHROPLASTYINYOUNGERPATIENTS6ANDPATIENTSWITHHIGHERBODYMASSINDICES7,PRESERVATIONOFBONEMASSMAYBECRITICALLYIMPORTANTINOPTIMIZINGTHEMECHANICALINTEGRITYOFTHEBONEIMPLANTINTERFACEANDENSURINGIMPLANTLONGEVITYALTHOUGHCEMENTLESSIMPLANTSHAVEASUCCESSFULTRACKRECORDINTOTALHIPARTHROPLASTY810,EXPERIENCETODATEWITHTRADITIONALBONEINGROWTHSURFACESBEADS,FIBERMESH,ETCHAVEPRODUCEDMIXEDRESULTSWITHTOTALKNEEARTHROPLASTYTKAIMPLANTS1113DATAFROMTHESWEDISHKNEEARTHROPLASTYREGISTRYINDICATETHATTHERISKOFASEPTICLOOSENINGISSIGNIFICANTLYHIGHERWITHCEMENTLESSTKAIMPLANTSTHANWITHCEMENTEDIMPLANTS14THEUSEOFABIOACTIVECOATINGSUCHASHYDROXYAPATITEHAHASBEENSHOWNTOENHANCEBONEAPPOSITIONANDIMPROVEIMPLANTFIXATIONINANIMALMODELS1517,ANDTHEREISWIDESPREADINTERESTINDEVELOPINGTHESECOATINGSFORTKAIMPLANTSHOWEVER,CONCERNSREMAINTHATVARIATIONSINCOATINGCOMPOSITIONANDDEPOSITIONMETHODSMAKEITVERYHARDTOOBTAINPREDICTABLEOSSEOINTEGRATIONINTKAASNEWCOATINGMETHODOLOGIESANDINGROWTHSURFACESAREDEVELOPED,THEREISAPRESSINGNEEDFORPRECLINICALDATATOSUPPORTTHESAFETYANDEFFICACYOFTHESECANDIDATECOATINGSANDFIXATIONSURFACESINANIMALMODELSTHATFAITHFULLYRECAPITULATETHECLINICALFEATURESOFTKAINHUMANSTHESPECIFICAIMOFTHISSTUDYWASTODETERMINEWHETHERANEW,SOLUTIONDEPOSITEDFORMOFHAPERIAPATITE,ORPASTRYKERORTHOPAEDICS,MAHWAH,NJ18PROVIDESEFFECTIVEFIXATIONOFTHETIBIALCOMPONENTINCEMENTLESSTKABECAUSEMOSTPRECLINICALRESEARCHONFROMTHEDEPARTMENTOFVETERINARYCLINICALSCIENCES,THEOHIOSTATEUNIVERSITY,COLUMBUS,OHIOYDEPARTMENTOFORTHOPEDICSURGERY,SUNYUPSTATEMEDICALUNIVERSITY,SYRACUSE,NEWYORKZDEPARTMENTOFORTHOPEDICSURGERY,DALHOUSIEUNIVERSITY,NOVASCOTIA,CANADA§DEPARTMENTOFPUBLICHEALTHANDPREVENTIVEMEDICINE,SUNYUPSTATEMEDICALUNIVERSITY,SYRACUSE,NEWYORKAND∥STRYKERORTHOPAEDICS,MAHWAH,NEWJERSEYSUBMITTEDAPRIL26,2011ACCEPTEDDECEMBER24,2011THECONFLICTOFINTERESTSTATEMENTASSOCIATEDWITHTHISARTICLECANBEFOUNDATDOI101016/JARTH201112029REPRINTREQUESTSMATTHEWJALLEN,VETMB,PHD,DEPARTMENTOFVETERINARYCLINICALSCIENCES,THEOHIOSTATEUNIVERSITY,601VERNONLTHARPST,COLUMBUS,OH43210?2012ELSEVIERINCALLRIGHTSRESERVED08835403/270600523600/0DOI101016/JARTH2011120291138THEJOURNALOFARTHROPLASTYVOL27NO62012RADIOGRAPHSWEREOBTAINEDTODOCUMENTACCURATEPOSITIONINGOFTHEIMPLANT,ASECONDDOSEOFANTIBIOTICSWASADMINISTERED,ANDAROBERTJONESBANDAGEWASAPPLIEDTHEDOGWASTHENTRANSFERREDTOASTAINLESSSTEELRECOVERYCAGESHORLINE,KANSASCITY,KANFOROVERNIGHTHOUSINGPOSTOPERATIVEPAINMANAGEMENTINCLUDEDOPIATEANALGESICSMORPHINE10MGIMEVERY6TO12HOURSFOR2DAYSPOSTOPERATIVELYNONSTEROIDALANTIINFLAMMATORYAGENTSCARPROFEN100MGORALLY,ONCEDAILYANDANTIBIOTICSCEPHALEXIN500MGORALLY,TWICEDAILYWEREGIVENONTHEFIRSTPOSTOPERATIVEMORNINGANDCONTINUEDFOR7TO10DAYSPOSTSURGERYTHEBANDAGEWASTYPICALLYREMOVED3TO4DAYSPOSTSURGERYSKINSTAPLESWEREREMOVED8TO10DAYSPOSTSURGERYTHEANIMALCARESTAFFCHECKEDTHEANIMALSATLEASTTWICEDAILY,ANDANYANIMALSHOWINGSIGNSOFPAINORDISTRESSWASREFERREDTOTHEATTENDINGVETERINARIANANIMALSWEREALSOEXAMINED5DAYS/WKBYONEOFTHETECHNICIANSONTHESTUDYBODYTEMPERATUREWASRECORDED,ANDTHESKININCISIONWASCHECKEDFORSIGNSOFINFLAMMATIONAND/ORINFECTIONONCETHESKINSTAPLESHADBEENREMOVED,THEFOCUSCHANGEDTOEVALUATINGKNEEFUNCTIONANDLIMBUSEDOGSWEREALLOWEDOUTOFTHEIRKENNELSFORPERIODSOFUPTO15MINUTESFROMWEEKS2THROUGH6,WITHTHEEXPECTATIONBEINGTHATLIMBUSEWOULDGRADUALLYINCREASEOVERTHISPERIODFROMWEEK6ONWARD,DOGSWEREALLOWED30MINUTESOFUNRESTRICTEDACTIVITYPERDAYPASSIVEJOINTRANGEOFMOTIONWASMEASUREDWITHAGONIOMETER,ANDLAMENESSWASEVALUATEDUSINGANESTABLISHEDSCORINGSCHEME27AT6,12,26,AND52WEEKSAFTERSURGERYBIPLANARORTHOGONALVIEWRADIOGRAPHSFORRSAWEREOBTAINEDWITHTHEANIMALUNDERHEAVYSEDATIONWITHMEDETOMIDINEHYDROCHLORIDE750ΜG/M2IVTHEOPERATEDSTIFLEJOINTWASPOSITIONEDINTHEKNEECAGECAGE10RSABIOMEDICALWITHTHELONGAXISO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