Microrough titanium surface affects biologic response in MG63 osteoblast-like cells

Area of Science:

• Biomaterials Science
• Cell Biology
• Orthopedic Research

Background:

• Titanium (Ti) is widely used in orthopedic and dental implants.
• Surface properties of Ti implants significantly influence biological responses.
• Understanding the relationship between Ti surface topography and cellular behavior is crucial for improving implant osseointegration.

Purpose of the Study:

• To characterize the surface properties of Ti disks with varying roughness.
• To investigate the biological response of MG63 cells to Ti disks of different surface roughness levels.
• To determine the optimal Ti surface microroughness for promoting osteogenic differentiation.

Main Methods:

• Ti disks were prepared and roughened using sandblasting and electric glow discharging.
• Surface properties, including roughness, were analyzed comprehensively.
• MG63 cell responses were assessed by measuring cell number, alkaline phosphatase (ALP) activity, Runx2 gene expression, and type I collagen production.
• Statistical analysis was performed using analysis of variance (ANOVA).

Main Results:

• Sandblasted Ti disks exhibited controlled surface roughness within clinically relevant ranges (1-3 µm).
• Increased Ti surface roughness correlated with decreased cell number.
• Higher surface roughness significantly increased ALP activity, type I collagen production, and Runx2 gene expression.
• Runx2 gene expression occurred earlier on rougher Ti surfaces.

Conclusions:

• Microrough Ti surfaces in the 1-3 µm range promote osteogenic differentiation and proliferation in MG63 cells.
• Surface roughness is a critical factor in modulating cellular responses to Ti implants.
• Tailoring Ti surface topography can enhance osseointegration and implant success.