Modified implant surface with slower and less initial biofilm formation

Area of Science:

• Biomaterials Science
• Dental Implantology
• Microbiology

Background:

• Peri-implant mucositis and peri-implantitis are increasing concerns in dental implantology.
• These infections are primarily caused by bacterial biofilm formation on implant surfaces.
• Implant surface texture influences biofilm development and maturation rates.

Purpose of the Study:

• To compare initial biofilm formation on three different titanium implant surfaces: machined (M), sandblasted large grit and acid-etched (SLA), and machined-modified acid-etched (mod MA).
• To assess the biocompatibility of these plaque-colonized surfaces using human gingival fibroblasts.

Main Methods:

• Titanium implant surfaces (M, SLA, mod MA) were exposed to initial biofilms.
• Plaque formation was quantified using erythrosine staining and energy-dispersive X-ray spectroscopy (EDX).
• Cell viability assays were performed on plaque-settled surfaces seeded with human gingival fibroblasts.

Main Results:

• Initial plaque accumulation was highest on the M surface, followed by SLA, and lowest on the mod MA surface (M > SLA > mod MA).
• Cell viability was highest on the M surface, with comparable results for mod MA and SLA surfaces.
• EDX analysis confirmed the differences in initial biofilm formation.

Conclusions:

• The mod MA surface demonstrated significantly reduced initial biofilm formation.
• This characteristic may benefit the transgingival healing process and enhance patient oral hygiene due to retarded plaque maturation.
• The mod MA surface presents a potential advantage in preventing peri-implant infections.