TY - JOUR

T1 - Strontium ion reinforced bioceramic scaffold for load bearing bone regeneration

AU - Prabha, R. D.

AU - Ding, Ming

AU - Bollen, P.

AU - Ditzel, N.

AU - Varma, H. K.

AU - Nair, P. D.

AU - Kassem, M.

PY - 2020/4

Y1 - 2020/4

N2 - Bone defects in load bearing areas require bone reconstruction with strong biomaterial having mechanical characteristics like cortical bone. Bioceramics are biomaterials that support bone formation as well as provide adequate mechanical properties. A strontium substitution of the bioceramic is expected to further increase its bioactivity by enhancing osteogenesis and protect the bone from osteoclastic resorption. The study involves development, characterization and in vivo testing of a newly developed strontium substituted hydroxyapatite based bioceramic scaffold (SrHAB) with sufficient biomechanical properties. Optimal concentration of strontium ion required for enhanced osteogenic differentiation was identified by comparing three compositions of SrHAB scaffold; namely Sri10HAB, Sr30HAB and Sr50 HAB for their Alkaline phosphatase activity in vitro. The selected Sr10HAB scaffold demonstrated in vivo bone formation with osteogenic differentiation of stromal derived mesenchymal stem cells (MSC) from human and ovine sources in ectopic and ovine models. Thus, Sr10HAB scaffold has a potential for application in load bearing bone requirements of orthopaedics and dentistry.

AB - Bone defects in load bearing areas require bone reconstruction with strong biomaterial having mechanical characteristics like cortical bone. Bioceramics are biomaterials that support bone formation as well as provide adequate mechanical properties. A strontium substitution of the bioceramic is expected to further increase its bioactivity by enhancing osteogenesis and protect the bone from osteoclastic resorption. The study involves development, characterization and in vivo testing of a newly developed strontium substituted hydroxyapatite based bioceramic scaffold (SrHAB) with sufficient biomechanical properties. Optimal concentration of strontium ion required for enhanced osteogenic differentiation was identified by comparing three compositions of SrHAB scaffold; namely Sri10HAB, Sr30HAB and Sr50 HAB for their Alkaline phosphatase activity in vitro. The selected Sr10HAB scaffold demonstrated in vivo bone formation with osteogenic differentiation of stromal derived mesenchymal stem cells (MSC) from human and ovine sources in ectopic and ovine models. Thus, Sr10HAB scaffold has a potential for application in load bearing bone requirements of orthopaedics and dentistry.

KW - Load bearing

KW - In vivo

KW - Bio ceramic

KW - Bone

KW - Strontium

KW - BIOACTIVE GLASSES

KW - DIFFERENTIATION

KW - OSTEOPONTIN

KW - GROWTH

KW - PHOSPHORYLATION

KW - RECONSTRUCTION

KW - ANGIOGENESIS

KW - RESORPTION

KW - INCREASES

KW - RANELATE

U2 - 10.1016/j.msec.2019.110427

DO - 10.1016/j.msec.2019.110427

M3 - Journal article

C2 - 32228983

VL - 109

JO - Materials Science and Engineering C: Materials for Biological Applications

JF - Materials Science and Engineering C: Materials for Biological Applications

SN - 1873-0191

M1 - 110427

ER -