Clamp for bone fracture connecting plate bending intensity and equivalent bending rigidity determination and method

A technology of bending strength and bending stiffness, which is applied in the field of bone plate quality inspection, can solve problems such as the inability to measure two sets of deflection values ​​at the same time, the inability to compare differences, and evaluate the quality of bone plates, so as to avoid errors, improve efficiency, and improve general use. sexual effect

Inactive Publication Date: 2017-06-23
山东省医疗器械产品质量检验中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current test plan can only measure one set of deflection values ​​for one bone plate, and it is impossible to measure two sets of deflection values ​​at the same time
Even for the same batch of products, there will be individual differences between different samples, and it is impossible to compare the differences in the measurement results of the two test methods, which is not conducive to accurate, scientific and objective evaluation of bone plate quality

Method used

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  • Clamp for bone fracture connecting plate bending intensity and equivalent bending rigidity determination and method
  • Clamp for bone fracture connecting plate bending intensity and equivalent bending rigidity determination and method
  • Clamp for bone fracture connecting plate bending intensity and equivalent bending rigidity determination and method

Examples

Experimental program
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Effect test

Embodiment 1

[0066] A jig for measuring the bending strength and stiffness of a bone plate, comprising an upper jig and a lower jig used in conjunction with each other.

[0067] Such as Figure 1 ~ Figure 3 As shown, the upper fixture includes an upper clamp body 1, and two inner rollers 6 are installed on the lower surface of the upper clamp body 1, and the inner roller shafts 6 are installed on the upper clamp body 1 through the upper adjustment plate 3, and the upper clamp body 1 An upper chute 8 is provided on the lower surface, and the upper adjusting plate 3 can drive the inner roller shaft 6 to slide along the upper chute 8 and realize positioning at any position of the upper chute 8 .

[0068] The upper chute 8 is a T-shaped slot, and the upper chute 8 is provided with an upper mounting block 7 matching it, and the upper mounting block 7 can slide along the upper chute; the upper mounting block 7 is located at the wider part of the top of the T-shaped slot ,Such as figure 2 As s...

Embodiment 2

[0107] The features of this embodiment that are the same as those of Embodiment 1 will not be described in detail. The features of this embodiment that are different from Embodiment 1 are: Figure 8 As shown, the outer roller shaft 13 is columnar, and the surface in contact with the sample is a cylinder of equal diameter, and the shape of the inner roller shaft 6 can be the same as that of the outer roller shaft.

Embodiment 3

[0109] The features of this embodiment that are the same as those of Embodiment 1 will not be described in detail. The features of this embodiment that are different from Embodiment 1 are: Figure 9 As shown, the outer roller shaft 13 is semi-cylindrical with equal diameter, and the surface in contact with the sample is an arc surface, and the shape of the inner roller shaft 6 can be the same as that of the outer roller shaft.

[0110] The shapes of the inner roller shaft 6 and the outer roller shaft 13 of the present invention are not limited to the shapes described in the embodiments, and can also be other shapes. From the aspect of processing technology, the cylindrical shape is a preferred embodiment, but as long as it The contact surface with the sample may be a cylindrical surface of equal diameter, and the arc diameter of the cylindrical surface of equal diameter is preferably 8 mm, 10 mm, 12 mm, and may be other values ​​between 8 mm and 13 mm.

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Abstract

The invention discloses a clamp for bone fracture connecting plate bending intensity and equivalent bending rigidity determination and a method, and belongs to the technical field of bone fracture connecting plate quality inspection. The clamp comprises an upper clamp and a lower clamp which are used in a mutually matched way, wherein the upper clamp comprises an upper clamp body; two downwards projected inner side roller shafts are arranged on the lower surface of the upper clamp body; the lower surface of each inner side roller shaft is an arc-shaped surface; the lower clamp comprises a lower clamp body; two upwards projected outer side roller shafts are arranged on the upper surface of the lower clamp body; the upper surface of each outer side roller shaft is an arc-shaped surface; three displacement sensors are arranged between the two outer side roller shafts in parallel; the displacement sensors positioned at the two sides correspond to the two inner side roller shafts. The invention also discloses a method for determining the bone fracture connecting plate by using the clamp. The clamp and the method have the advantages that the test efficiency and the test result accuracy are improved; the test cost is reduced.

Description

technical field [0001] The invention relates to the technical field of bone plate quality inspection, in particular to a fixture and method for measuring the bending strength and equivalent bending stiffness of a bone plate, and is especially suitable for using the four-point method to measure the bending strength and equivalent bending stiffness of a bone plate Stiffness was measured. Background technique [0002] Bone plate is a high-risk medical device under national key supervision. It is a fixation device designed according to the shape of human bones and bionics. It is usually used to treat orthopedic diseases that require fixation due to various reasons. The quality inspection before it is put into use is very important and is closely related to the physical rehabilitation status of patients. Clinical suspicious medical device adverse events mainly manifested as plate fracture, bending, loosening, etc. [0003] Therefore, the bending strength, equivalent bending sti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/04G01N3/20G01M5/00
CPCG01M5/005G01N3/04G01N3/20G01N2203/0682G01N2203/0023G01N2203/0075G01N2203/04G01N2203/0282G01N2203/0003
Inventor 姚秀军万敏刘万宗
Owner 山东省医疗器械产品质量检验中心
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