A poly(lactide-co-glycolide)/hydroxyapatite composite scaffold with enhanced osteoconductivity.

Current ceramic bone substitutes face challenges in biocompatibility and integration with host tissue. Traditional fabrication methods often rely on organic solvents, which may affect cell viability. These solvents can also limit the exposure of ceramic particles on the scaffold surface. Limited ceramic exposure may reduce the scaffold's ability to support new bone growth. Researchers have explored alternative fabrication techniques to improve surface properties. One key limitation is the difficulty in achieving high ceramic exposure without harmful chemicals. This gap motivated the development of a new fabrication method. The goal is to enhance scaffold performance in bone regeneration.

This study aimed to develop a new fabrication method for polymer/ceramic scaffolds. The goal was to increase ceramic exposure on the scaffold surface. The researchers wanted to avoid the use of organic solvents. They hypothesized that higher ceramic exposure would improve bone regeneration. The study compared two fabrication techniques: GF/PL and SC/PL. The focus was on measuring bone formation in a rat model. The team evaluated histological and imaging data. The objective was to determine if the new method improves osteoconductivity.

The researchers used a gas foaming and particulate leaching (GF/PL) method. This technique avoids the use of organic solvents. They fabricated PLGA/HA composite scaffolds using this method. A conventional solvent casting and particulate leaching (SC/PL) method was also used. Both methods involved nanohydroxyapatite (HA) and poly(D,L-lactide-co-glycolide). Ceramic exposure was assessed using selective staining techniques. Scaffolds were implanted in rat skull defects for 8 weeks. Bone regeneration was evaluated using histology and microcomputed tomography.

GF/PL scaffolds showed significantly more HA nanoparticle exposure than SC/PL scaffolds. Histological analysis revealed greater bone formation in the GF/PL group. Microcomputed tomography confirmed enhanced bone regeneration in the GF/PL scaffolds. The increased HA exposure may explain the improved osteoconductivity. The GF/PL method did not use harmful organic solvents. Bone formation was more extensive in the GF/PL group. The results suggest that the new method improves scaffold performance. The study supports the use of GF/PL for better bone regeneration outcomes.

The GF/PL method increases HA nanoparticle exposure on the scaffold surface. This exposure may enhance the scaffold's wettability and osteoconductivity. The study found that GF/PL scaffolds support more bone regeneration than SC/PL scaffolds. The absence of organic solvents in GF/PL is a key advantage. The results suggest that the fabrication method affects scaffold performance. The authors propose that higher ceramic exposure improves bone formation. The study highlights the importance of surface properties in tissue engineering. The findings support further exploration of the GF/PL method for bone scaffolds.