载荷骨量对微型种植体稳定性影响的生物力学分析

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1、英文摘要Theeffectofvaryingbonequantityenduredloadingonorthodonticmini-implantstability：AbiomechaniealanalysisABSTRACTObjective：Thisstudyadoptsthemethodofinvitroexperiments．Themini-implantswereinsertedintopigiliacboneblocksdependingonthedifferentdistancestotheedgeofbone．髓eaimofthi

2、sstudywastoevaluatetheeffectofdifferentbonequantityenduredloadingontheanchorageabilityoftitaniummini—implantsusedfororthodonticanchorage．Methods：1MakingboneblockmodelTheiliumofcountrypigswaschosenastheboneblockmodel，onceallthesofttissueandcartilagehadbeenremovedwithasize22sca

3、lpel，abandsawwasusedtosawtheiliumintoblocksmeasuring1cmlongand9cmwide．Allbone／mini-implantblocksweresubsequentlytransferedinto10％bufferedformalinat40Cforfixation．2Mini—implantinsertion2．1MarkingtheimplantsiteAfterthesofttissuehadbeenremoved，eigthpositionsweremarkedonthesurfac

4、eofallthetestblocksformini-implantplacement．Markingtwopointsrespectivelyat3ram，4mm，5mmand6mmfromtheedgeofthebone．ThelateraldistancebetweenadjacentpointsislOmm．Twopointsofthesamedistancefromtheedge，theleftsiteisplannedtoinsertedverticallyandtheri出45otiltedocclusally．2．2Makingt

5、hepre-drillingThehandpiecewasoperatedwithadentalimplantationmotor．Settingtherotatespeedofhandpieceas100rpm．Thepilotdrillingwereperformedinthedirectionoftheplannedmini—implantinsertion．Asrecommendedbythemanufacturers，thepilotholesweredrilledundercoolingwithphysiologicalsalineT

6、hedrillingdepthswereadjustedat7rnnlwiththepredrilling4薹查塑墨一——一—————————————————————————————————一——diameters1．2mm．2．3Screwingthemini—implants触lmini．implantsweremanuallyinsertedintothepilotholeusingahandheldscreW(1riverinclockwisedirection．Finally，settingtheinsertiontorqueas10N

7、cmwithtortiontester·3BiomechanicaltestARera11milli．implantswereinsertedintoboneblocks，pullstrengthtestingwasperformedbyusingamicrocomputercontrolelectronic唧vers2Lltestingmachine．Thetestingmachinetightlyclampthebone／implantsspecim髓andpullthemini．implantheadbyastainlesssteelwir

8、e·Thepullforceshouldbeparalleltothebonesurfaceandperpendiculartothee