3D hydrogel/ bioactive glass scaffolds in bone tissue engineering: Status and future opportunities

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Tissue Engineering

Background:

• Significant bone defects pose a clinical challenge, necessitating biomaterials with osteogenic and angiogenic properties for vascularized bone regeneration.
• Bioactive glasses (BaG) stimulate angiogenesis and osteogenesis, while polymers offer biocompatibility and ECM-like structures.
• Composite scaffolds combining BaG and polymers can enhance mechanical properties and bioactivity for bone regeneration.

Purpose of the Study:

• To review composite scaffolds incorporating BaG for vascularized bone regeneration.
• To discuss the effects of BaG on osteo-inductivity and angiogenic properties.
• To explore the adaptation of ion-doped hydrogel composites into 3D scaffolds for bone tissue generation.

Main Methods:

• Comprehensive literature review of composite scaffolds containing bioactive glass.
• Analysis of studies focusing on osteogenic and angiogenic effects.
• Examination of 3D scaffold fabrication and ion-doping strategies.

Main Results:

• Composite scaffolds with BaG show promise in stimulating both bone formation and vascularization.
• 3D scaffolds offer advantages for bone regeneration, including controlled ion release.
• Hydrogel composites enhance mechanical strength and bioactivity compared to individual components.

Conclusions:

• BaG-incorporated hydrogel composite scaffolds are promising for vascularized bone tissue engineering.
• 3D fabrication and ion-doping are key strategies for optimizing these biomaterials.
• Further research is needed to address manufacturing challenges and clinical translation.