Extract and mechanical properties measurement method of bone trabecula and measurement mechanism

A measurement method and trabecular bone technology, applied in the field of biomechanical experiments, can solve problems such as applications that have not been reported, and achieve the effects of accurate mechanical performance parameters and true and reliable measurement results.

Inactive Publication Date: 2008-04-09
TSINGHUA UNIV
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Problems solved by technology

However, the application in the field of measuring the mechanical properties of trabecular bone has not been reported.

Method used

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  • Extract and mechanical properties measurement method of bone trabecula and measurement mechanism
  • Extract and mechanical properties measurement method of bone trabecula and measurement mechanism
  • Extract and mechanical properties measurement method of bone trabecula and measurement mechanism

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Embodiment Construction

[0030] The extraction of the trabecular bone proposed by the present invention and the method for measuring mechanical properties and its device are described in detail in conjunction with the accompanying drawings and embodiments as follows: (because stretching and compression are only the direction of movement of the loading section is opposite, others are the same. For the convenience of the following description, take the Stretching is described as an example. This patent is also suitable for compression.)

[0031] A kind of pair embodiment of the method of the present invention, this embodiment is to the measurement of bone trabecular mechanical properties under the physiological state (when carrying out each step below, will guarantee that trabecular is in normal saline operation as far as possible, to prevent it from being caused by dehydration and affect its mechanical properties), the method may further comprise the steps:

[0032] 1) Cut the cancellous bone of femora...

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Abstract

The invention relates to an extracting of a bone trabecula and a test method and a device of mechanical property, which belongs to the biological mechanics experiment technical field. The method comprises: 1. the bone is cut into a plurality of small blocks at the length of the bone trabecula; 2. the marrow in the middle of each small spongy bone block is rejected clearly and the spongy bone structure is only left; 3. a small spongy bone block which has an intact bone trabecula is chosen and the bone trabecula around the intact bone trabecula is cut away; 4. the bone trabecula is stretched and compressed at the direction paralleled with a loading force, and the two ends of the bone trabecula are fixed; 5. the CCD camera is aimed to the bone trabecula so as to lead the picture of the bone trabecula in the CCD to be clear; 6. the displacement of the stretching or compressing of the bone trabecula is controlled; 7. the picture and the load of the bone trabecula in each time quantum are recorded synchronously; 8. the displacement field and the strain field of each load is worked out according to DSCM; namely the poisson ratio of the material and the strain curve of the strain of the bone trabecula can be obtained. The invention can minimize the damage greatly, and lead a plurality of mechanical property parameters to be more correct.

Description

technical field [0001] The invention belongs to the technical field of biomechanical experiments, and in particular relates to extraction and mechanical property characterization techniques of bone trabeculae. Background technique [0002] Bone tissue consists of cortical bone and cancellous bone. Through decades of research, people have had a deep understanding of the biomechanical properties of cortical bone, and have used this knowledge to guide clinical practice, which has played a huge role. Due to the needs of clinical medicine, the research on the mechanical properties of cancellous bone has gradually become a research hotspot these years. Cancellous bone is a network structure composed of trabecular bone, and its biomechanical properties are determined by the mechanical properties and porosity of the trabecular bone. The size of porosity can be measured and characterized by experimental methods such as Micro CT. For the study of mechanical properties of trabeculae...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/483G01N19/00
Inventor 姚学锋王鹏雷一鸣戴如春
Owner TSINGHUA UNIV
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