Abdul-Monem, M., Alabbassy, F., Ahmed, D., Aly, H., Kamoun, E., El-Fakharany, E. (2021). PREPARATION, CHARACTERIZATION AND OSTEOGENIC POTENTIAL OF AN INJECTABLE PHOTO-CURABLE HYALURONIC ACID HYDROGEL SCAFFOLD LOADED WITH BIOACTIVE NANO-HYDROXYAPATITE.. Alexandria Dental Journal, 46(Issue 2), 146-152. doi: 10.21608/adjalexu.2020.20075.1000
Abdul-Monem, M., Alabbassy, F., Ahmed, D., Aly, H., Kamoun, E., El-Fakharany, E. (2021). 'PREPARATION, CHARACTERIZATION AND OSTEOGENIC POTENTIAL OF AN INJECTABLE PHOTO-CURABLE HYALURONIC ACID HYDROGEL SCAFFOLD LOADED WITH BIOACTIVE NANO-HYDROXYAPATITE.', Alexandria Dental Journal, 46(Issue 2), pp. 146-152. doi: 10.21608/adjalexu.2020.20075.1000
Abdul-Monem, M., Alabbassy, F., Ahmed, D., Aly, H., Kamoun, E., El-Fakharany, E. PREPARATION, CHARACTERIZATION AND OSTEOGENIC POTENTIAL OF AN INJECTABLE PHOTO-CURABLE HYALURONIC ACID HYDROGEL SCAFFOLD LOADED WITH BIOACTIVE NANO-HYDROXYAPATITE.. Alexandria Dental Journal, 2021; 46(Issue 2): 146-152. doi: 10.21608/adjalexu.2020.20075.1000
PREPARATION, CHARACTERIZATION AND OSTEOGENIC POTENTIAL OF AN INJECTABLE PHOTO-CURABLE HYALURONIC ACID HYDROGEL SCAFFOLD LOADED WITH BIOACTIVE NANO-HYDROXYAPATITE.
1Dental Biomaterials,Faculty of dentistry,Alexandria University,Egypt.
2Dental Biomaterials Department, Faculty of Dentistry, Alexandria University, Alexandria, Egypt.
3Department of Oral Biology, Faculty of Dentistry, Alexandria University, Alexandria,Egypt.
4Polymeric Materials Research Department, City of Scientific Research and Technological Applications, Alexandria, Egypt
5Protein Research Dep., Genetic Engineering and Biotechnology Research Institute, City of Scientific Research and Technological Applications, Alexandria, Egypt.
Abstract
Introduction: In-situ photo-cured hydrogels for bone regeneration offer an advantage compared to solid scaffolds or membranes is that it can be used by minimally invasive techniques and can fill irregularly shaped defects easily. Objective: was to prepare an injectable photo-curable hyaluronic acid hydrogel scaffold loaded with bioactive nano-hydroxyapatite using riboflavin as a natural source photoinitiator for bone regeneration and to investigate the effect of addition of nano-hydroxyapatite on the physiochemical and mechanical properties of the prepared hydrogel. Also, the osteogenic potential of the prepared hydrogels was assessed in a rabbit model. Materials and methods: Two groups were prepared, (Group I) photo-cured hyaluronic acid as a control group and (Group II) photo-cured hyaluronic acid/nano-hydroxyapatite. Laboratory characterization tests: FTIR, XRD, SEM, mechanical, swelling and degradation rate tests were performed. Cell viability % using the MTT assay was used to assess the biocompatibility. In vivo bioactivity was assessed in a rabbit model and histomorphometric analysis was done. Results: Statistical analysis of results revealed that the addition of nano-hydroxyapatite increased significantly the mechanical properties of the hydrogels. SEM images demonstrated that the addition of nano-hydroxyapatite caused the formation of inter-connected pores. MTT assay showed that hydrogel extract didn’t affect cell viability after 48h. Histomorphometric analysis results revealed that the photo-cured (GMA-HA/HAP) hydrogel increased the osteogenic potential by one and a half folds compared to the control group and this proved its bioactivity. Conclusion: Results suggest that the prepared photo-cured hyaluronic hydrogel is a promising biomaterial to deliver bioactive nano-hydroxyapatite and has an osteogenic potential.
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