Postoperative stability following a triple pelvic osteotomy is affected by implant configuration: a finite element analysis
Artikel i vetenskaplig tidskrift, 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

Författare

Henrik Hedelin

Göteborgs universitet

Sahlgrenska universitetssjukhuset

Erik Brynskog

Chalmers, Mekanik och maritima vetenskaper, Fordonssäkerhet

Per Larnert

Göteborgs universitet

Sahlgrenska universitetssjukhuset

Johan Iraeus

Chalmers, Mekanik och maritima vetenskaper, Fordonssäkerhet

Tero Laine

Sahlgrenska universitetssjukhuset

Göteborgs universitet

Kerstin Lagerstrand

Göteborgs universitet

Sahlgrenska universitetssjukhuset

Journal of Orthopaedic Surgery and Research

1749799x (eISSN)

Vol. 17 1 275

Infrastruktur

C3SE (Chalmers Centre for Computational Science and Engineering)

Ämneskategorier

Ortopedi

Medicinsk bildbehandling

DOI

10.1186/s13018-022-03169-3

PubMed

35570304

Mer information

Senast uppdaterat

2022-09-27