Osteoblast response to dimethacrylate composites varying in composition, conversion and roughness using a...

Area of Science:

• Biomaterials Science
• Orthopedic Materials
• Cellular Response to Materials

Background:

• Dimethacrylate polymers and composites are increasingly used in orthopedic applications.
• Assessing biocompatibility through direct contact cytotoxicity assays is crucial for tissue integration.
• Understanding material property effects on cellular behavior is vital for orthopedic implant development.

Purpose of the Study:

• To evaluate osteoblast (MC3T3-E1) response to dimethacrylate composites with varied properties.
• To utilize a combinatorial testing platform for simultaneous assessment of multiple material factors.
• To determine how filler content, filler type, degree of conversion, and surface topography affect cell behavior.

Main Methods:

• Culturing MC3T3-E1 pre-osteoblasts directly on dimethacrylate composites.
• Employing a combinatorial testing platform to vary filler content, filler type, degree of conversion (DC), and surface topography.
• Analyzing cell viability, density, and area in response to material property variations.

Main Results:

• Cell viability, density, and area were influenced by an interplay of material properties.
• Low degree of conversion (DC) reduced cell area but minimally impacted viability.
• High filler content increased osteoblast cell density, while filler content/type modified surface roughness based on DC.

Conclusions:

• The combinatorial testing platform effectively quantified the impact of multiple material properties on osteoblast responses.
• Material properties significantly influence the biocompatibility of dimethacrylate composites for orthopedic applications.
• Findings provide insights for designing improved dimethacrylate-based orthopedic materials.