ndyag激光轰击处理纯钛表面对钛瓷结合强度影响的实验研究

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1、AStudyofNd：YAGlaserEtchingontheBondingStrengthofTitaniumtoAbstractObjective：ToinvestigatetheeffectsofNd：YAGlasertreatmentoftitaniumonmicrostructureandthebondingstrengthofporcelaintotitanium．Methods：33non-casttitaniumstripswereprogressivelypolishedby240靛400撑．800≠}and1000jfi}siliconcarbidesandpaperun

2、derrunningwateT,thenthe30stripsweredividedintothreegroups(GroupAtoC，11stripspergroup)randomly．GroupA：sandblasted；GroupB：Nd：YAGlaserirradiatedat20A，15s；GroupC：Nd：YAGlaserirradiatedat20A，30s．Followingsurfacetreatments，microstructuralandchemicalanalysiswereperformedbymeansofelectronmicroscopeexaminati

3、onandEDS，andthesurfaceroughnesswasmeasured．．Low-fusingporcelainwasappliedontothetitaniumspecimensaccordingtothemanufacturer’Sinstructions．Bondingstrengthofthesampleswasmeasuredbyathree—pointbendingtesteraccordingtoIS09693．ElectronmicroscopeexaminationandEDSanalysiswerealsoperformedforonespecimenofe

4、achgroupaftertheshearbondstrengthtesttoevaluatethenatureofthefracturesurface．Results：Therewasasignificantdifferenceinsurfaceroughnesswithrespecttosurfacetreatment(p<0．05)．Thereweredifferentinthesurfacemorphologyandthephasecomponentsofthreegroups．EDSanalysisshowedthatspecimenofAgroupwasconsistingofT

5、ielement，OelementsandA1elements；specimensofgroupBorgroupCwasconsisting．3，万方数据ofTielementonly．GroupC(31．42±2．47MPalproducedthehighestbondstrengthamongthegroups(p

6、tofISO9693．TheelectronmicroscopeexaminationimageafterdebondingofgroupCshowedporcelainretainedonthesurface．Conclusion：LaseretchingoftitaniumsurfacesusinganNd：YAGlaserwaseffectiveinimprovingsurfaceroughnessandwettabilityoftitanium．Lasertreatmentmaybeanalternativemethodtosandblastingforenhancingthebon

7、dingstrengthoflow—fusingporcelaintotitanium．KeyWords：Neodymium：yttrium-aluminum—garnetlaser／Titanium／Three--point·-flexure··test万方数据．^L--L日IJ吾烤瓷熔附金属全冠(porcelain．fused．to．metalcrown，PFM)也称金属烤瓷全冠，具有美观、强度高等特点，