微型钩钢板固定指骨掌板撕脱性骨折的生物力学研究

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Abstract Objective To investigate the mechanical stability of micro hook plate in the fixation of avulsion fracture of metacarpal plate of phalanx.Methods The middle phalanx of 6 hand specimens were made into a model of avulsion fracture of the metacarpal plate. The same specimen was divided into experimental group and control group by drawing lots on the left and right hands. The experimental group was fixed with a new hook steel plate，while the control group was fixed with micro screws for the index finger，kirschner wire for the middle finger，ordinary steel plate for the ring finger，and double hole transverse micro hook steel plate for the little finger. We measured the traction force of the volar plate，recorded the maximum tension of 2mm separation of the fracture end，and compared the mechanical differences of different internal fixation methods.Results The maximum tension of 2 mm was (50.17±1.92)N，(45.80±4.02)N，(46.68±3.33)N，(43.75±3.34)N in the experimental group. The control group was (20.15±2.14)N，(10.55±1.46)N，(45.23±3.73)N，(28.88±2.00)N respectively. There was no significant difference between the ring finger group and the control group，and the difference between the other finger group and the experimental group was statistically significant (P＜0.05).Conclusion The new hook plate is biomechanically stable in the fixation of avulsion fracture of the palmar plate of the finger，has no obvious compression on the tendon and bone，and can be used for early functional exercise.

Key words： phalange palmar plate avulsive fracture

Corresponding Authors: Duan Xianglin

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	Shang Xiaoqiang
	Duan Xianglin
	Wang Jun
	Yang Ping
	Zhou Xiangkun
	Sun Wei
	Tao Shengxiang
	Zheng Zhou

Cite this article:

Shang Xiaoqiang,Duan Xianglin,Wang Jun, et al. Biomechanical Study on Fixation of Avulsion Fracture of Phalangeal Metacarpal Plate With Micro Hook Plate[J]. sygkzz, 2022, 28(7): 616-618.

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http://www.sygkzz.com/EN/ OR http://www.sygkzz.com/EN/Y2022/V28/I7/616

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