Bluetooth - it's something we use in everyday life, and it generally has nothing to do with teeth!
However, in this case, blue seems like a good tooth-related colour for this creative advertising style image!
The toothbrush and toothpaste were shot using the same/similar lighing setup with a diffuser and gridded stobe overhead and a stripbox camera left. The toothpaste trail was created using Blender and the separate images composited together using Photoshop.
I hope that this puts a smile on your face and chases away the blues for a few moments!
Remember - brush twice daily, you only get 2 sets of teeth!
