Development and biomechanical study of a new sternoclavicular
hook plate

doi:10.3969/j.issn.2095-4344.2495

Abstract

Abstract:

BACKGROUND: At present, most of the treatment of unstable dislocation of sternoclavicular joint is to insert the hook plate of acromioclavicular joint into the cavity of sternal bone marrow or put it behind the sternum. The difficulty of operation is increased because of the insufficient application of steel plate, which reduces the effect of joint reduction.

OBJECTIVE: The research team has developed a new type of sternoclavicular hook plate (Patent No. ZL201520515237.3), and compared the biomechanical properties of acromioclavicular hook plate and new sternoclavicular hook plate to fix sternoclavicular joint from the aspect of biomechanics.

METHODS: The sternum and clavicle at both ends of the sternoclavicular joint were replaced with a rectangular artificial bone. Eighteen pairs of artificial sternoclavicular joints were randomly divided into two groups. In control group (n=6), the plate screw hole section of the shortest segment 3-hole common acromioclavicular hook plate was fixed to the artificial clavicle end; and the hook end was placed on the back side of the artificial sternum. Load and displacement changes in artificial sternal fractures were measured with MTS biomaterial test system. In the experimental group (n=12), the plate screw hole section of the shortest rod section 2 hole new sternoclavicular hook plate was fixed to the artificial clavicle end; and the hook end was inserted into the artificial sternum. The MTS biomaterial test system was used to detect changes in load and displacement of the anterior cortical bone (n=6) and posterior cortical bone (n=6).

RESULTS AND CONCLUSION: In the control group, the mean of maximum destructive force was (390±51) N. The mean of maximum destructive force of anterior cortical bone was (421±55) N. In the experimental group, the mean of maximum destructive force of posterior cortical bone was (437±56) N. There were no significant differences between the three groups (P > 0.05). Results indicated that the new sternoclavicular hook plate did not increase the risk of sternum fracture, and it was a safe and effective internal fixation material.

Key words: internal fixator, sternoclavicular joint dislocation, hook plate, biomechanics, sternum, fracture, research and development, artificial bone

CLC Number:

Lin Wang, Wang Yingying, Lin Weimin, Xu Shenggui, Huang Qilong, Guo Weizhong, Lin Chengshou. Development and biomechanical study of a new sternoclavicular hook plate[J]. Chinese Journal of Tissue Engineering Research, 2020, 24(9): 1395-1399.

Figures/Tables 1

References

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