Cementum and enamel surface mimicry influences soft tissue cell behavior

Area of Science:

• Biomaterials Science
• Cell Biology
• Dental Implantology

Background:

• Soft tissue integration around dental abutments is crucial for implant success.
• Titanium surface properties influence cellular responses, impacting tissue integration.
• Understanding cell-specific responses to varying titanium topographies is key.

Purpose of the Study:

• To investigate if titanium surface roughness can guide gingival fibroblast and keratinocyte behavior.
• To enhance soft tissue integration quality around abutments using tailored titanium surfaces.

Main Methods:

• Created titanium discs with enamel-like (M) and cementum-like (MA) roughness, varying hydrophilicity.
• Assessed human fibroblast and keratinocyte adhesion and proliferation on these surfaces.
• Utilized immunofluorescence and qPCR to analyze cell behavior in depth.

Main Results:

• Enamel-like surfaces (M) supported keratinocyte growth and differentiation.
• Cementum-emulating surfaces (MA) inhibited keratinocyte growth but supported fibroblast adhesion and proliferation.
• Increased hydrophilicity of MA surfaces enhanced fibroblast adhesion and elastin expression.

Conclusions:

• A bimodal titanium roughness design, combining enamel-like (M) and hydrophilic cementum-like (hMA) surfaces, is optimal for abutments.
• This design selectively guides cell responses, impairing epithelial downgrowth and promoting fibroblast adhesion for a robust soft tissue barrier.