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Calcium phosphate coating on dental composite resins by a laser-assisted biomimetic process
A Joseph Nathanael1, Ayako Oyane1, Maki Nakamura1
1Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 5, 1-1-1 Higashi Tsukuba, 305-8565, Japan.
Objectives:
Dental composite resins with better biocompatibility and osteoconductivity have been sought in endodontic treatments. This study aimed to develop a technique to produce the osteoconductive resin surfaces through calcium phosphate (CaP) coating using a laser-assisted biomimetic (LAB) process.
Methods:
Light-cured, acrylic-based composite resins were used as substrates. The resin substrate was subjected to a LAB process comprising Nd:YAG pulsed laser irradiation in a supersaturated CaP solution. The LAB-processed substrate was immersed for 3 days in a simulated body fluid (SBF) for the preliminary osteoconductivity assessment.
Results:
After irradiation for 30 min, the resin surfaces were partly coated with a newly formed CaP layer. The coating layer contained hydroxyapatite as the main crystalline phase and the coating coverage depended on the laser wavelength and the type of resin. The LAB-processed CaP-coated surface exhibited apatite-forming ability in SBF.
Conclusions:
LAB process is effective for CaP coating on light-cured dental composite resins and improving their osteoconductivity.
Clinical Significance:
The LAB process is a potential new tool to create a cementum-like osteoconductive surface on dental composite resins.
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