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目的 觀察不同振動頻率刺激下股骨表觀密度的變化情況,從而確定何種振動參數(shù)能對骨骼系統(tǒng)產(chǎn)生最有益影響.方法 先獲得兔股骨掃描圖像,再利用UG軟件對圖像進(jìn)行三維重建得到股骨的實(shí)體模型,最后導(dǎo)入ANSYS軟件中,利用ANSYS軟件布爾操作中的減操作,得到帶有空腔的兔股骨生物力學(xué)模型.結(jié)果 通過有限元仿真分析,發(fā)現(xiàn)添加振動激勵后骨骼的應(yīng)力分布和骨密度發(fā)生了變化,股骨部分部位骨密度增加.結(jié)論 有限元分析不但為分析振動對骨重建的動物和人體實(shí)驗(yàn)打下基礎(chǔ),還為進(jìn)一步深入了解骨骼結(jié)構(gòu)與力學(xué)環(huán)境之間的關(guān)系、為進(jìn)一步研究對抗航天失重引起的骨丟失和治療骨質(zhì)疏松癥提供了幫助.

1. Clinton Rubin,McLeod KJ.Promotion of bony ingrowth by frequency-specific,low-amplitude mechanical strain[J].Clinical Orthopaedics and Related Research,1994,298(8):165-174.
2. Clinton Rubin,Steven Bain.Low mechanical signs strengthen long bone[J].Nature,2001,412(8):603-604.
3. Clinton Rubin.The anabolic activity of bone tissue,suppressed by disuse,is normalized by brief exposure to extremely low-magnitude mechanical stimuli[J].The FASEB Journal,2001,15(12):2225-2229.
4. Rubin C,Judex S,Q in YX,et al.Inhibition of osteopenia by low magnitude,high frequency mechanical stimuli[J].Drug Discovery Today,2001,6(16):848-858.
5. Judex Stefan,Boyd Steve,Rubin Clintion,et al.Adaptations of trabecular bone to low magnitude vibrations result in more uniform stress and strain under load[J].Annals of Biomedical Engineering,2003,31(1):12-20.
6. Clinton Rubin,Robert Recker,Diane Cullen,et al.Prevention of postmenopausal bone loss by a low-magnitude,high-frequency mechanical stimuli:a clinical trial assessing compliance,efficacy,and safety[J].Bone & Mineral Research,2004,19(3):343-351.
7. Russo,Fulvio Lauretani,Stefania Bandinelli,et al.High-frequency vibration training increases muscle power in postmenopausal women[J].Arch Phys Med Rehabil,2003,84 (12):1854-1857.
8. Beaupré GS,Orr TE,Garter DR.An approach for time,dependent bone modeling and remodeling application:a preliminary remodeling simulation.J orthop Res,1990,8:662-670.
9. Rubin C,Turner AS,MallinckrodtC,et al.Mechanical strain,Induced noninvasively in the high-frequency domain,is anabolic to cancellous bone,but not cortical bone.Bone,2002,30(3):445-452.
10. Fischer KJ,Jacobs CR,Levenston ME,et al.Observation of convergence and uniqueness of node,based bone remodeling simulations.Annals of Biomechanical Engineering,1997,25:261-268
11. 宮赫,朱興華.初始密度對骨自優(yōu)化結(jié)果的影響[J].中國生物醫(yī)學(xué)工程學(xué)報(bào),2000,19(3):277-280.
12. 李志香.30 Hz全身振動對骨質(zhì)疏松的影響[J].航天醫(yī)學(xué)與醫(yī)學(xué)工程,2007,20(2):116-119.