Mechanical Analysis of Explanted Telescopic Rods in the Management of Osteogenesis Imperfecta: A Multicenter Study

Background: Telescopic rods in the management of osteogenesis imperfecta fail frequently. This could be attributed to technical errors, rod design, and structure. We aimed analyze mechanical properties tribology explanted male female components identify effects vivo telescoping that may relate observed patterns successful or failure. Methods: Recruitment took place at 3 4 English centers for imperfecta. Twenty-five growth failure during revision a new were analyzed terms clinical indication prerevision imaging if there was mode failure. Laboratory analysis performed using optical scanning electrical microscopy, radiograph diffraction analysis, hardness test, bending energy-dispersive x-ray spectroscopy. Results: All implants tested high-grade stainless steel. Female had inferior strength [mean Vickers property (HV0.3) 0.3 313?kg] comparison (HV0.3 406) due different techniques manufacture. also higher wear coefficient (7.89×10?12?m3/N/m3) than (6.46×10?12?m3/N/m3). Abrasive wear, shear deformation, scratches, debris identified all rods. Male displayed corrosion contributing adhesive wear. Intraoperatively cut rods, particularly components, irregular ends leading more wear. Conclusions: Current manufacturing result material compared with males, which combined is likely lead implant Intraoperative cutting increase risk Considering improve as well design better outcomes.