Three-dimensional model analysis of trabecular acetabular cup
and solid acetabular cup

doi:10.3969/j.issn.2095-4344.2413

Abstract

Abstract:

BACKGROUND: Hip arthroplasty is most effective method to treat hip diseases such as femoral head necrosis, osteoarthritis, hip dysplasia and femoral neck fracture in the elderly. Therefore, it is necessary to study the biomechanical behaviors of hip arthroplasty.

OBJECTIVE: To simulate the contact stress and Von Mise stress values and distributions of trabecular acetabular cup and solid acetabular cup by finite element analysis method, and to predict its effects on prosthesis and hip joint.

METHODS: Two hip joint component models with different structures, trabecular acetabular cup and solid acetabular cup were designed in 3-Matic Research 11.0 software. The well-designed models were imported to Hypermesh 14.0 software to divide meshes and assign material properties. Finite element analysis software Abaqus 6.13 was used to simulate the stress values and distributions of both models.

RESULTS AND CONCLUSION: The results of this study showed that the stress of the trabecular acetabular cup was scattered and distributed widely. The solid acetabular cup is prone to stress concentration, and the stress distribution is concentrated near the point of stress. Compared with the solid acetabular cup and the trabecular acetabular cup, the latter has larger contact area of stress distribution and more uniform stress distribution, which can reduce the wear between hip prostheses and the risk of aseptic loosening of hip prostheses.

Key words: trabecular, acetabular cup, hip joint, finite element, contact stress, Mise stress, stress distribution, wear

CLC Number:

Wang Hui, Zhang Yazhou, Shi Lifang. Three-dimensional model analysis of trabecular acetabular cup and solid acetabular cup [J]. Chinese Journal of Tissue Engineering Research, 2020, 24(3): 390-394.

Figures/Tables 2

References

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