Postoperative stability following a triple pelvic osteotomy is affected by implant configuration: a finite element analysis
Journal article, 2022

Background
The triple pelvic osteotomy is an established surgical method with multiple modifications regarding surgical technique and choice of implant. The stability of the osteotomy is affected by numerous factors, and among these, the three-dimensional implant configuration is a scientifically less explored aspect.

Methods
We used a finite element model of a hemi-pelvis with a standardized triple osteotomy to calculate relative flexibility for loads in all translational degrees of freedom for five different implant configurations. Two of the configurations used entry points only feasible when implant removal was not necessary.

Results
The stability of the osteotomy improved with an increased distance between the implants in the plane of the osteotomy as well as for a more perpendicular angle relative to the osteotomy plane. The implant configurations with more entry points available made this easier to adhere to.

Conclusion
The use of bioabsorbable implants may provide better opportunities for optimal implant constructs which can, to a certain degree, compensate for the lesser mechanical stiffness of bioabsorbable polymers as compared to metal implants.

Finite element analysis

Osteotomy

Acetabulum

Bioabsorbable screw

Fixation

Author

Henrik Hedelin

University of Gothenburg

Sahlgrenska University Hospital

Erik Brynskog

Chalmers, Mechanics and Maritime Sciences (M2), Vehicle Safety

Per Larnert

University of Gothenburg

Sahlgrenska University Hospital

Johan Iraeus

Chalmers, Mechanics and Maritime Sciences (M2), Vehicle Safety

Tero Laine

Sahlgrenska University Hospital

University of Gothenburg

Kerstin Lagerstrand

University of Gothenburg

Sahlgrenska University Hospital

Journal of Orthopaedic Surgery and Research

1749799x (eISSN)

Vol. 17 1 275

Infrastructure

C3SE (Chalmers Centre for Computational Science and Engineering)

Subject Categories

Orthopedics

Medical Image Processing

DOI

10.1186/s13018-022-03169-3

PubMed

35570304

More information

Latest update

9/27/2022