J Healthc Eng:种植钉植入后何时才可进行正畸加载?

2017-07-22 MedSci MedSci原创

种植体植入后需要达到骨结合,但是对于正畸科医生来说,正畸微种植体的各种种植体界面是其感兴趣的地方。目前,关于种植钉为保持稳定而需要的最小骨整合量并没有达成明确的共识。本研究旨在探讨不同骨植入界面对微种植体及其周围组织的影响。采用有限元分析方法,代表种植体-骨界面的一种较为先进的方法,并结合有限元模型分析骨种植体的骨整合程度。总共进行了26种不同的有限元分析。计算并比较了应力/应变模式,同时对种植钉

种植体植入后需要达到骨结合,但是对于正畸科医生来说,正畸微种植体的各种种植体界面是其感兴趣的地方。目前,关于种植钉为保持稳定而需要的最小骨整合量并没有达成明确的共识。本研究旨在探讨不同骨植入界面对微种植体及其周围组织的影响。

采用有限元分析方法,代表种植体-骨界面的一种较为先进的方法,并结合有限元模型分析骨种植体的骨整合程度。总共进行了26种不同的有限元分析。计算并比较了应力/应变模式,同时对种植钉的移位进行评价。

结果,不同骨种植体界面其应力/应变分布也不同。完全未达到骨结合时,应力/应变分布比较均匀。达到15%的骨结合后,应力/应变逐渐集中在皮质骨区。未有骨整合的情况下,种植钉的移位程度最大。骨整合从0%到3%,种植钉的最大位移急剧下降,趋于稳定。

总之,该研究表明,从生物力学的角度来看,可以认为正畸加载可应用于微种植体达到15%的骨整合后,而没有任何稳定性损失。

原始出处:


Fabing Tan, Chao Wang, et al., Biomechanical Effects of Various Bone-Implant Interfaces on the Stability of Orthodontic Miniscrews: A Finite Element Study. J Healthc Eng. 2017; 2017: 7495606. Published online 2017 Jun 19. doi: 10.1155/2017/7495606.
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    2017-08-12 shizhenshan
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    2018-06-05 spoonycyy
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    2017-09-07 huangdf
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    2017-07-24 wxl882001

    学习一下

    0

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    2017-07-24 grace5700
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    2017-07-24 jiyangfei
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