Titanium wear from magnetically controlled growing rods (MCGRs) for the treatment of spinal deformities in children

2022 | journal article. A publication with affiliation to the University of Göttingen.

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​Titanium wear from magnetically controlled growing rods (MCGRs) for the treatment of spinal deformities in children​
Lüders, K. A.; Braunschweig, L. ; Zioła-Frankowska, A.; Stojek, A.; Jakkielska, D.; Wichmann, A. & Dihazi, G. H.  et al.​ (2022) 
Scientific Reports12(1).​ DOI: https://doi.org/10.1038/s41598-022-15057-1 

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Authors
Lüders, K. A.; Braunschweig, L. ; Zioła-Frankowska, A.; Stojek, A.; Jakkielska, D.; Wichmann, A.; Dihazi, G. H. ; Streit, F, ; Güsewell, S. E.; Trüe, T. C.; Hell, A. K. 
Abstract
Magnetically controlled growing rods (MCGRs) are an effective treatment method for early-onset scoliosis (EOS). In recent years, increasing titanium wear was observed in tissue adjacent to implants and in blood samples of these patients. This study aims to investigate the potential correlation between amount of metal loss and titanium levels in blood during MCGR treatment as well as influencing factors for metal wear. In total, 44 MCGRs ( n  = 23 patients) were retrieved after an average of 2.6 years of implantation and analyzed using a tactile measurement instrument and subsequent metal loss calculation. Titanium plasma levels ( n  = 23) were obtained using inductively coupled plasma-mass spectrometry (ICP-MS). The correlation of both parameters as well as influencing factors were analyzed. Titanium abrasion on MCGRs was observed in the majority of implants. There was no correlation of metal implant wear or titanium plasma values to the duration of MCGR implantation time, number of external lengthening procedures, patient\’s ambulatory status, gender, weight or height. Material loss on the MCGRs showed a positive correlation to titanium blood plasma values. The present study is one of the first studies to analyze retrieved MCGRs using high-precision metrological techniques and compare these results with ICP-MS analyses determining blood titanium values.
Issue Date
2022
Journal
Scientific Reports 
eISSN
2045-2322
Language
English
Sponsor
Bundesministerium für Bildung und Forschung http://dx.doi.org/10.13039/501100002347
Uniwersytet im. Adama Mickiewicza w Poznaniu http://dx.doi.org/10.13039/501100013920
Herzzentrum Göttingen
Open-Access-Publikationsfonds 2022

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