Drug loaded biodegradable load-bearing nanocomposites for damaged bone repair

E. Y. Gutmanas, I. Gotman, A. Sharipova, S. G. Psakhie, S. K. Swain, R. Unger

Результат исследований: Материалы для книги/типы отчетовМатериалы для конференции

4 Цитирования (Scopus)

Аннотация

In this paper we present a short review-scientific report on processing and properties, including in vitro degradation, of load bearing biodegradable nanocomposites as well as of macroporous 3D scaffolds for bone ingrowth. Biodegradable implantable devices should slowly degrade over time and disappear with ingrown of natural bone replacing the synthetic graft. Compared to low strength biodegradable polymers, and brittle CaP ceramics, biodegradable CaP-polymer and CaP-metal nanocomposites, mimicking structure of natural bone, as well as strong and ductile metal nanocomposites can provide to implantable devices both strengths and toughness. Nanostructuring of biodegradable β-TCP (tricalcium phosphate)-polymer (PCL and PLA), β-TCP-metal (FeMg and FeAg) and of Fe-Ag composites was achieved employing high energy attrition milling of powder blends. Nanocomposite powders were consolidated to densities close to theoretical by high pressure consolidation at ambient temperature - cold sintering, with retention of nanoscale structure. The strength of developed nanocomposites was significantly higher as compared with microscale composites of the same or similar composition. Heat treatment at moderate temperatures in hydrogen flow resulted in retention of nanoscale structure and higher ductility. Degradation of developed biodegradable β-TCP-polymer, β-TCP-metal and of Fe-Ag nanocomposites was studied in physiological solutions. Immersion tests in Ringer's and saline solution for 4 weeks resulted in 4 to 10% weight loss and less than 50% decrease in compression or bending strength, the remaining strength being significantly higher than the values reported for other biodegradable materials. Nanostructuring of Fe-Ag based materials resulted also in an increase of degradation rate because of creation on galvanic Fe-Ag nanocouples. In cell culture experiments, the developed nanocomposites supported the attachment the human osteoblast cells and exhibited no signs of cytotoxicity. Interconnected system of nanopores formed during processing of nanocomposites was used for incorporation of drugs, including antibiotics and anticancer drugs, and can be used for loading of bioactive molecules enhancing bone ingrowth.

Язык оригиналаАнглийский
Название основной публикацииPhysics of Cancer
Подзаголовок основной публикацииInterdisciplinary Problems and Clinical Applications - Proceedings of the International Conference on Physics of Cancer: Interdisciplinary Problems and Clinical Applications, PC IPCA 2017
РедакторыElazar Y. Gutmanas, Oleg B. Naimark, Yurii P. Sharkeev
ИздательAmerican Institute of Physics Inc.
Том1882
ISBN (электронное издание)9780735415621
DOI
СостояниеОпубликовано - 28 сен 2017
СобытиеInternational Conference on Physics of Cancer: Interdisciplinary Problems and Clinical Applications, PC IPCA 2017 - Tomsk, Российская Федерация
Продолжительность: 23 мая 201726 мая 2017

Конференция

КонференцияInternational Conference on Physics of Cancer: Interdisciplinary Problems and Clinical Applications, PC IPCA 2017
СтранаРоссийская Федерация
ГородTomsk
Период23.5.1726.5.17

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Цитировать

    Gutmanas, E. Y., Gotman, I., Sharipova, A., Psakhie, S. G., Swain, S. K., & Unger, R. (2017). Drug loaded biodegradable load-bearing nanocomposites for damaged bone repair. В E. Y. Gutmanas, O. B. Naimark, & Y. P. Sharkeev (Ред.), Physics of Cancer: Interdisciplinary Problems and Clinical Applications - Proceedings of the International Conference on Physics of Cancer: Interdisciplinary Problems and Clinical Applications, PC IPCA 2017 (Том 1882). [020025] American Institute of Physics Inc.. https://doi.org/10.1063/1.5001604