Selective bone cell adhesion on formulations containing carbon nanofibers

Area of Science:

• Biomaterials Science
• Nanotechnology
• Orthopedic Engineering

Background:

• Carbon nanofibers (CNFs) possess excellent mechanical properties and nanoscale dimensions similar to bone's hydroxyapatite.
• These properties suggest potential applications for CNFs in orthopedic and dental implants.
• Understanding cell interactions with CNFs is crucial for developing effective implant materials.

Purpose of the Study:

• To investigate bone cell adhesion on novel carbon nanofibers and polycarbonate urethane/carbon nanofiber (PCU/CNF) composites.
• To determine the effects of carbon fiber dimensions, surface energy, and chemistry on various cell types.

Main Methods:

• In vitro study examining cell adhesion on CNFs and PCU/CNF composites.
• Evaluation of osteoblast, fibroblast, chondrocyte, and smooth muscle cell adhesion.
• Analysis of how CNF dimensions, surface energy, and chemistry influence cell attachment.

Main Results:

• Smaller-scale (nanometer dimension) carbon fibers promoted osteoblast adhesion.
• Osteoblast adhesion increased with higher weight percentages of high surface energy CNFs in PCU/CNF composites.
• Smooth muscle cell, fibroblast, and chondrocyte adhesion decreased with increased CNF surface energy or altered chemistry.

Conclusions:

• Nanoscale carbon fibers show promise for enhancing osteoblast adhesion in orthopedic applications.
• Surface properties of CNFs significantly influence the adhesion of various cell types, affecting biocompatibility.
• PCU/CNF composite design can be optimized by controlling CNF weight percentage and surface characteristics for specific cellular responses.