Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.biomaterials.2009.05.067
Title: Biological performance of a polycaprolactone-based scaffold used as fusion cage device in a large animal model of spinal reconstructive surgery
Authors: Abbah, S.A.
Goh, J.C.H.
Wong, H.-K. 
Lam, C.X.L.
Hutmacher, D.W.
Keywords: Bioresorbable fusion cage devices
Bone graft substitute
Bone regeneration
Porcine model
Spinal reconstructive surgery
Issue Date: 2009
Source: Abbah, S.A., Goh, J.C.H., Wong, H.-K., Lam, C.X.L., Hutmacher, D.W. (2009). Biological performance of a polycaprolactone-based scaffold used as fusion cage device in a large animal model of spinal reconstructive surgery. Biomaterials 30 (28) : 5086-5093. ScholarBank@NUS Repository. https://doi.org/10.1016/j.biomaterials.2009.05.067
Abstract: A bioactive and bioresorbable scaffold fabricated from medical grade poly (epsilon-caprolactone) and incorporating 20% beta-tricalcium phosphate (mPCL-TCP) was recently developed for bone regeneration at load bearing sites. In the present study, we aimed to evaluate bone ingrowth into mPCL-TCP in a large animal model of lumbar interbody fusion. Six pigs underwent a 2-level (L3/4; L5/6) anterior lumbar interbody fusion (ALIF) implanted with mPCL-TCP + 0.6 mg rhBMP-2 as treatment group while four other pigs implanted with autogenous bone graft served as control. Computed tomographic scanning and histology revealed complete defect bridging in all (100%) specimen from the treatment group as early as 3 months. Histological evidence of continuing bone remodeling and maturation was observed at 6 months. In the control group, only partial bridging was observed at 3 months and only 50% of segments in this group showed complete defect bridging at 6 months. Furthermore, 25% of segments in the control group showed evidence of graft fracture, resorption and pseudoarthrosis. In contrast, no evidence of graft fractures, pseudoarthrosis or foreign body reaction was observed in the treatment group. These results reveal that mPCL-TCP scaffolds could act as bone graft substitutes by providing a suitable environment for bone regeneration in a dynamic load bearing setting such as in a porcine model of interbody spine fusion. © 2009 Elsevier Ltd. All rights reserved.
Source Title: Biomaterials
URI: http://scholarbank.nus.edu.sg/handle/10635/25267
ISSN: 01429612
DOI: 10.1016/j.biomaterials.2009.05.067
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