Improved design and biomechanical characteristics of the rotary self-locking intramedullary nail of the humerus

doi:10.3969/j.issn.2095-4344.2015.39.026

Abstract

Abstract:

BACKGROUND: Humeral fractures can be treated by using rotary self-locking intramedullary nail. The previous spin in self-locking intramedullary nail has some limitations in application, so it should be improved in its design so as to obtain better biomechanical effect.
OBJECTIVE: To improve the design of the rotary self-locking intramedullary nail of the humerus, and to analyze its biomechanical characteristics and application effect, and to provide reference for the clinical treatment of humeral fractures.
METHODS: (1) The design of the rotary self-locking intramedullary nail was improved and tested by mechanics test. (2) A total of 63 cases of humeral fractures were randomly divided into two groups: control group (31 cases) and experimental group (32 cases). Patients in the control group received conventional rotary self-locking intramedullary nail, and patients in the experimental group received improved nail.
RESULTS AND CONCLUSION: Results of mechanical test concerning anti-axial compression, tensile, torsion and bending were obviously better after improvement than before improvement. No significant difference in range of motion was detected between the two groups (P > 0.05). Compared with that before treatment, the range of motion was significantly increased after treatment in both groups (P < 0.01 or P < 0.05). The range of motion was significantly higher in the experimental group than in the control group (P < 0.05). Simultaneously, the excellent and good rate was significantly higher in the experimental group than in the control group (P < 0.05). These data
suggest that the improved rotary self-locking intramedullary nail has better mechanical characteristics and can obtain better clinical effect.

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: Humeral Fractures, Bone Nails, Biomechanics

CLC Number:

R318

Bai Xiao-bing, Zhao Qin-peng. Improved design and biomechanical characteristics of the rotary self-locking intramedullary nail of the humerus[J]. Chinese Journal of Tissue Engineering Research, doi: 10.3969/j.issn.2095-4344.2015.39.026.

Figures/Tables 6

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