Biological modification of tooth surface by laser-based apatite coating techniques

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Dental Research

Background:

• Periodontal disease causes loss of connective tissue attachment, necessitating new regenerative procedures.
• Apatite coatings on root surfaces can improve biocompatibility and promote connective tissue reattachment.

Purpose of the Study:

• To develop novel laser-based techniques for apatite coating of tooth surfaces.
• To evaluate the efficacy of these techniques for periodontal regenerative therapy.

Main Methods:

• Laser-assisted biomimetic (LAB) process: Irradiating tooth substrates in calcium phosphate solution to form apatite films.
• Fluoride-incorporated apatite film formation using LAB for antibacterial properties.
• Laser-induced forward transfer with optical stamp (LIFTOP) process: Transferring pre-formed apatite films with fibronectin onto tooth substrates.

Main Results:

• LAB process successfully created submicron-thick apatite films via laser-assisted pseudo-biomineralization.
• Fluoride-apatite films exhibited antibacterial activity against Streptococcus mutans.
• LIFTOP process enabled rapid, low-heat transfer of cell-adhesive films, preserving fibronectin's bioactivity.

Conclusions:

• The LAB and LIFTOP processes are promising novel tools for tooth surface modification.
• These laser-based techniques hold potential for treating periodontal disease and regenerating lost attachment structures.