Chinese Journal of Tissue Engineering Research ›› 2018, Vol. 22 ›› Issue (27): 4359-4363.doi: 10.3969/j.issn.2095-4344.0353

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Mechanical stability of external fixator versus metacarpal plate for Rolando fracture by three-dimensional finite element analysis  

Ai Deng-chao1, Lu Yun2   

  1. 1Graduate School of Tianjin Medical University, Tianjin 300070, China, 2Department of Orthopedics, Tianjin TEDA Hospital, Tianjin 300457, China
  • Online:2018-09-28 Published:2018-09-28
  • Contact: Lu Yun, Chief physician, Department of Orthopedics, Tianjin TEDA Hospital, Tianjin 300457, China
  • About author:Ai Deng-chao, Master candidate, Graduate School of Tianjin Medical University, Tianjin 300070, China
  • Supported by:

    the Tianjin Science and Technology Project, No. 12ZCZDSY02800; the Medical Science and Technology Project of Binhai District Health Bureau, No. 2011BHKL003

Abstract:

BACKGROUND: The incidence of Rolando fracture is high, and there is no unified theory for the selection of external fixation and internal fixation plate.

OBJECTIVE: To compare the mechanical stability of the external fixator and metacarpal plate by establishing the three-dimensional (3D) finite element models, so as to provide a theoretical basis for the clinical treatment of Rolando fracture.
METHODS: One healthy adult volunteer was selected, and the wrist joint was scanned by CT and MRI. The data were imported into Mmics 10.0, and the 3D model of the first and the second metacarpal and trapezium was established. All data were imported into Geomagic studio 10 for editing, and then transferred into ANSYS 12.0. Micro external fixator, the micro metacarpal bone plate model and Rolando fracture type in the clinical treatment principle of the two kinds of fixation methods were constructed. Each model was built following appropriate unit type, and then given 100 N of vertical load in the first metacarpal fracture distal, and the maximum displacement was detected.
RESULTS AND CONCLUSION: (1) In the external fixation group, the relative displacement and total displacement of the maximum and minimum values of palm ulnar fracture end were 2.033, 0.201, 5.674, and 0.548 mm, were 2.537, 0.405, 4.479, 0.127 mm on the dorsolateral fracture end, respectively. In the plate group, the relative displacement and total displacement of the maximum and minimum values of palm ulnar fracture end were 0.385, 0.133, 0.595, 0.163 mm, were 0.278, 0.164, 0.501, 0.142 mm on the dorsal lateral fracture end, respectively. The differences were significant between two groups (P < 0.05). (2) To conclude, metacarpal plate is an ideal method for Rolando fracture.

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: Fractures, Bone, Internal Fixators, Finite Element Analysis, Tissue Engineering

CLC Number: