Bispherical metal augment improved biomechanical stability in severe acetabular deficiency reconstruction: a comparative finite element analysis

Background This study used finite element analysis (FEA) to compare the biomechanical stability of bispherical metal augment (BA) and wedge-shaped trabecular-metal augment (TA) in different acetabular defect reconstruction models, thereby explaining the application value of this novel bispherical au...

Full description

Saved in:
Bibliographic Details
Published inBMC musculoskeletal disorders Vol. 25; no. 1; pp. 1 - 10
Main Authors Li, Guoyuan, Zhang, Xiaoqi, Chen, Min, Luo, Zhengliang, Ji, Xiaofeng, Pan, Chunang, Li, Hui, Shang, Xi-fu
Format Journal Article
LanguageEnglish
Published London BioMed Central Ltd 31.08.2024
BioMed Central
BMC
Subjects
Acetabular defect
Acetabulum
Augments
Biomechanics
Bone implants
Care and treatment
Defects
Design
Females
Finite element analysis
Finite element method
Hip
Interfaces
Joint diseases
Mechanical properties
Metal products
Orthopedic implants
Pelvis
Polymethyl methacrylate
Revision total hip arthroplasty
Skin & tissue grafts
Surgery, Experimental
Surgical research
Transplants & implants
China
Online AccessGet full text

Cover

More Information
Summary:Background This study used finite element analysis (FEA) to compare the biomechanical stability of bispherical metal augment (BA) and wedge-shaped trabecular-metal augment (TA) in different acetabular defect reconstruction models, thereby explaining the application value of this novel bispherical augment in complex hip revision. Methods Three different acetabular defect pelvis models originating from three representative patients with different types of severe acetabular defects (Paprosky IIC, IIIA, and IIIB) were constructed and reconstruction with BA and TA technique was simulated. Based on the FEA models, the displacement of reconstruction implants, relative displacement of bone implants, and hemi-pelvic von Mises stress were investigated under static loads. Results BA acquired smaller reconstruction system displacement, less relative displacement of bone implants, and lower pelvic von Mises stress than TA in all Paprosky IIC, IIIA, and IIIB defect reconstructions. Conclusion The FEA results show that BA could acquire favourable biomechanical stability in severe acetabular defect reconstruction. This technique is a reliable method in complex hip revision. Keywords: Revision total hip arthroplasty, Acetabular defect, Augments, Finite element analysis
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1471-2474
1471-2474
DOI:10.1186/s12891-024-07816-0