Table 2.

The list and potential applications of nanotubes materials used in restorative dentistry.

Nanotubes	Potential Applications
Titanium dioxide nanotubes (nt-TiO2)	nt-TiO2 were found effective in carrying 1,3,5-Trimethylhexahydro-1,3,5-triazine in a dental adhesive to exert antibacterial properties and improve the µ-tensile bond strength
Halloysite nanotubes (HNT)	HNT may deliver bioactive components around the incorporated materials by depositing calcium phosphate compounds, which may contribute to remineralization [112]. HNT can act as a drug delivery system with triclosan [113], quaternary ammonium compound [114], chlorhexidine [115], and doxycycline [116] in different resin-based materials
Boron nitride nanotubes (BNNTs)	BNNTs were found to increase the contact angle, decrease the surface energy, improve the mechanical properties [117], and preserved the bonding interface in a dental adhesive [118]