公开(公告)号：US09895104B2

公开(公告)日：2018-02-20

申请号：US13261567

申请日：2011-07-12

申请人： Randall Connor ,  Daniel Bridges ,  Paul Hansma

发明人： Randall Connor ,  Daniel Bridges ,  Paul Hansma

IPC分类号： A61B19/00 ,  A61B5/00 ,  G01N3/42 ,  A61C19/04

CPC分类号： A61B5/4504 ,  A61B5/0053 ,  A61C19/04 ,  G01N3/42

摘要： The device performs reference point indentation without a reference probe. The indentation distance is measured relative to the instrument which remains substantially stationary during the impact process, which occurs on the order of one millisecond. In one embodiment, an impact motion with a peak force of order 28N creates an indentation in bone with a depth of approximately 150 μm during which the instrument case moves less than 1 μm. Thus the error in measuring indentation depth due to the motion of the case is less than 1%, making a reference probe unnecessary. Further, this “error” is consistent and can be corrected. In one embodiment, the device measures the fracture resistance of hard tissues by actually creating microscopic fractures in the hard tissues in a measured way. It creates these microscopic fractures by impacting the sample with a sharpened probe. The indentation distance in the sample is correlated with fracture resistance.

公开(公告)号：US20130122466A1

公开(公告)日：2013-05-16

申请号：US13261567

申请日：2011-07-12

申请人： Randall Connor ,  Daniel Bridges ,  Paul Hansma

发明人： Randall Connor ,  Daniel Bridges ,  Paul Hansma

IPC分类号： A61B5/00

CPC分类号： A61B5/4504 ,  A61B5/0053 ,  A61C19/04 ,  G01N3/42

摘要： The device performs reference point indentation without a reference probe. The indentation distance is measured relative to the instrument which remains substantially stationary during the impact process, which occurs on the order of one millisecond. In one embodiment, an impact motion with a peak force of order 28N creates an indentation in bone with a depth of approximately 150 μm during which the instrument case moves less than 1 μm. Thus the error in measuring indentation depth due to the motion of the case is less than 1%, making a reference probe unnecessary. Further, this “error” is consistent and can be corrected. In one embodiment, the device measures the fracture resistance of hard tissues by actually creating microscopic fractures in the hard tissues in a measured way. It creates these microscopic fractures by impacting the sample with a sharpened probe. The indentation distance in the sample is correlated with fracture resistance.

摘要翻译： 该设备执行参考点缩进，无参考探针。 相对于在冲击过程中保持基本上静止的仪器测量压痕距离，其发生在一毫秒量级。 在一个实施例中，具有28N的峰值力的冲击运动在具有大约150μm的深度的骨中产生凹陷，在该深度期间仪器壳体移动小于1um。 因此，由于壳体的运动导致测量压痕深度的误差小于1％，使得不需要参考探头。 此外，这个“错误”是一致的，可以被纠正。 在一个实施例中，该装置通过以测量的方式实际地在硬组织中产生微观骨折来测量硬组织的抗断裂性。 它通过用尖锐的探针冲击样品来产生这些微观裂缝。 样品中的压痕距离与抗断裂性相关。