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Chiral Tartaric Acid Improves Fracture Toughness of Bioactive Brushite-Collagen Bone Cements.


ABSTRACT: Brushite cements are promising bone regeneration materials with limited biological and mechanical properties. Here, we engineer a mechanically improved brushite-collagen type I cement with enhanced biological properties by use of chiral chemistry; d- and l-tartaric acid were used to limit crystal growth and increase the mechanical properties of brushite-collagen cements. The impact of the chiral molecules on the cements was examined with Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). A 3-point bend test was utilized to study the fracture toughness, and cell attachment and morphology studies were carried out to demonstrate biocompatibility. XRD and SEM analyses showed that l-, but not d-tartaric acid, significantly restrained brushite crystal growth by binding to the {010} plane of the mineral and increased brushite crystal packing and the collagen interaction area. l-Tartaric acid significantly improved fracture toughness compared to traditional brushite by 30%. Collagen significantly enhanced cell morphology and focal adhesion expression on l-tartaric acid-treated brushite cements.

SUBMITTER: Sarrigiannidis SO 

PROVIDER: S-EPMC7461128 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature

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Chiral Tartaric Acid Improves Fracture Toughness of Bioactive Brushite-Collagen Bone Cements.

Sarrigiannidis Stylianos O SO   Moussa Hanan H   Dobre Oana O   Dalby Matthew J MJ   Tamimi Faleh F   Salmeron-Sanchez Manuel M  

ACS applied bio materials 20200706 8


Brushite cements are promising bone regeneration materials with limited biological and mechanical properties. Here, we engineer a mechanically improved brushite-collagen type I cement with enhanced biological properties by use of chiral chemistry; d- and l-tartaric acid were used to limit crystal growth and increase the mechanical properties of brushite-collagen cements. The impact of the chiral molecules on the cements was examined with Fourier-transform infrared spectroscopy (FTIR), X-ray diff  ...[more]

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