Injectable MnSr-doped brushite bone cements with improved biological performance

authors	Torres, PMC; Marote, A; Cerqueira, AR; Calado, AJ; Abrantes, JCC; Olhero, S; Silva, OABDE; Vieira, SI; Ferreira, JMF
nationality	International
journal	JOURNAL OF MATERIALS CHEMISTRY B
keywords	BETA-TRICALCIUM PHOSPHATE; TO-POWDER RATIO; MECHANICAL-PROPERTIES; IN-VITRO; STRENGTH IMPROVEMENT; HYPODERMIC INJECTION; CALCIUM PHOSPHATES; IONIC MODIFICATION; STRONTIUM; SUBSTITUTION
abstract	Good mechanical properties and high injectability are the major requirements to ensure widespread application of calcium phosphate cements (CPCs) as bone substitutes in minimally invasive surgeries. However, obtaining CPCs that exhibit a good compromise between these two properties as well as good biological performance is still a great challenge. This study presents novel solutions to improve these properties, which include (i) co-doping beta-tricalcium phosphate (beta-TCP) powder with Sr and Mn, and (ii) adding small amounts of saccharides (sucrose or fructose) to the setting-liquid solution. The combination of these two strategies enabled full injectability and significantly increased the wet compressive strength of CPCs in comparison to undoped or solely Sr-doped CPCs. Furthermore, the proliferative response of human MG63 osteoblastic cells, their rate of collagen-I secretion, and particularly their growth behaviour on the cement surfaces were also enhanced. The overall improved relevant properties of Mn/Sr co-doped CPCs with added sucrose, including in vitro biological performance, renders them very promising materials for bone regeneration and tissue engineering.
publisher	ROYAL SOC CHEMISTRY
issn	2050-750X
isbn	2050-7518
year published	2017
volume	5
issue	15
beginning page	2775
ending page	2787
digital object identifier (doi)	10.1039/c6tb03119f
web of science category	Materials Science, Biomaterials
subject category	Materials Science
unique article identifier	WOS:000398949000009