Chinese Journal of Tissue Engineering Research ›› 2018, Vol. 22 ›› Issue (27): 4305-4310.doi: 10.3969/j.issn.2095-4344.0324

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Comparison of the biomechanical characteristics of the locking reconstruction plate through different placement methods for transverse fracture of the acetabulum  

Zhong Xiao1, Jia Xu-feng2, Huang Guang-ping2, Zhou Qing-zhong3   

  1. 1Department of Orthopedics, West China Ziyang Hospital, Sichuan University (the First People’s Hospital of Ziyang), Ziyang 641300, Sichuan Province, China; 2Department of Orthopedics, the People’s Hospital of Jianyang City, Jianyang 641400, Sichuan Province, China; 3Department of Orthopedics, the Affiliated Hospital of Southwest Medical University, Luzhou 641400, Sichuan Province, China
  • Online:2018-09-28 Published:2018-09-28
  • About author:Zhong Xiao, Associate chief physician, Department of Orthopedics, West China Ziyang Hospital, Sichuan University (the First People’s Hospital of Ziyang), Ziyang 641300, Sichuan Province, China
  • Supported by:

    the Research Project of Health and Family Planning Commission of Chengdu, Sichuan Province, No. 2016035

Abstract:

BACKGROUND: Locking reconstruction plate is used in the internal fixation of acetabular fractures in a variety of ways, and different fixation methods have certain advantages. However, the biomechanical characteristics of different internal fixation methods are little reported.

OBJECTIVE: To compare the biomechanical differences of locking compression plate with different internal fixation methods in the treatment of acetabular transverse fracture.
METHODS: Forty adult semipelvic specimens were used to make the transverse acetabular fracture model, and then randomly divided into four groups. Anterior column fixation group received simple iliac anterior column locking reconstruction plate fixation; posterior column fixation group received locking compression plate fixation of anterior column reconstruction; the anterior column combined fixation group received iliac anterior column locking reconstruction plate fixation, while the posterior column implanted with one lag screw; posterior column combined fixation group received locking reconstruction plate internal fixation in the posterior column and one screw placement in the anterior column. The horizontal and longitudinal displacements of the fracture end under the loads of 600, 1 400 and 1 800 N were detected, and the axial stiffness was calculated.
RESULTS AND CONCLUSION: (1) The horizontal displacement of the fracture end under the loads of 600, 1 400 and 1 800 N in the anterior column and posterior column combined fixation groups was significantly lower than that in the anterior column and posterior column fixation groups (P < 0.05). There was no significant difference between anterior column and posterior column combined fixation groups, and the horizontal displacement in the anterior column fixation group was significantly smaller than that in the posterior column fixation group (P < 0.05). (2) The longitudinal displacement of the fracture end under the loads of 600, 1 400 and 1 800 N in the anterior column and posterior column combined fixation groups was significantly lower than that in the anterior column and posterior column fixation groups (P < 0.05). There was no significant difference between anterior column and posterior column combined fixation groups, and the longitudinal displacement in the anterior column fixation group was significantly smaller than that in the posterior column fixation group (P < 0.05). (3) The axial stiffness under the loads of 600, 1 400 and 1 800 N in the anterior column and posterior column combined fixation groups was significantly lower than that in the anterior column and posterior column fixation groups (P < 0.05). There was no significant difference between anterior column and posterior column combined fixation groups, and the longitudinal displacement in the anterior column fixation group was significantly smaller than that in the posterior column fixation group (P < 0.05). (4) These results indicate that for transverse acetabular fractures, locking compression plate combined with lag screw fixation shows better biomechanical stability than the single locking reconstruction plate internal fixation; and iliac bone anterior locking compression plate internal fixation reconstruction exhibits better biomechanical stability than the posterior column fixation.

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程

Key words: Acetabulum, Fractures, Bone, Internal Fixators, Biomechanics, Tissue Engineering

CLC Number: