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01.08.2011 | Original Article

In vivo preclinical evaluation of the influence of osteoporosis on the anchorage of different pedicle screw designs

verfasst von: Gianluca Giavaresi, Milena Fini, Roberto Giardino, Francesca Salamanna, Maria Sartori, Veronica Borsari, Silvia Spriano, Chiara M. Bellini, Marco Brayda-Bruno

Erschienen in: European Spine Journal | Ausgabe 8/2011

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Abstract

We investigate the anchorage of pedicle screws with different surface treatments in osteoporotic bone. Eight ewes were divided into two groups of four animals each: four sheep underwent bilateral ovariectomy (OVX Group), whereas the operation was simulated in the remaining group (SHAM Group). Eighteen months after the first operation, the Dynesys^® System was fitted to the sheep using pedicle screws with three different surface treatments: untreated, rough blasted (uncoated) and bioactive coated (bioactive). Uncoated screws showed a significantly higher bone ingrowth value compared with the untreated screws in the OVX group (9.3%, p < 0.005) and a significantly lower bone ingrowth value in the SHAM group (−11.0%, p < 0.05). Furthermore, the bioactive pedicle screws had a significant lower bone ingrowth value than the untreated screws in the SHAM group (−12.1%, p < 0.05). These results suggest that both tested surface treatments of pedicular screws may provide an advantage in terms of bone quality and osseointegration, when implanted in osteoporotic vertebrae.

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Titel: In vivo preclinical evaluation of the influence of osteoporosis on the anchorage of different pedicle screw designs
verfasst von: Gianluca Giavaresi
Milena Fini
Roberto Giardino
Francesca Salamanna
Maria Sartori
Veronica Borsari
Silvia Spriano
Chiara M. Bellini
Marco Brayda-Bruno
Publikationsdatum: 01.08.2011
Verlag: Springer-Verlag
Erschienen in: European Spine Journal / Ausgabe 8/2011
Print ISSN: 0940-6719
Elektronische ISSN: 1432-0932
DOI: https://doi.org/10.1007/s00586-011-1831-5

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