Nylon.
Yes ,the bristles and the handles of toothbrush are made of the same material that is nylon.
Yes ,the bristles and the handles of toothbrush are made of the same material that is nylon.
All bristles are safe,
The capitol of a toothbrush (most important part) is the bristles. Why am I answering this?
No
Helpful Friction.
I'm assuming that they are attached on a small board. I would expect the plastic of the toothbrush to be put over the board and the piece over the board would have holes to allow the bristles to come through the plastic.
No. The bristles of the brush will damage the soft tissue inside.
it stands for the stiffness of the bristles but the lower the number the softer or harder?
Typically, cheap toothbrushes are made from plastic handles and nylon bristles. Higher end toothbrushes might have wooden handles and boar bristles.
A modern toothbrush is made up of two parts, the handle and the bristles. The handle is made up of plastic and sometimes plastic and rubber with small hole at one end that hold the bristles. The bristles are made up of short strands of nylon and are held in their place in hole in the handle by small pieces of corrosion resistant stainless steel staples.
Ahh, I remember when I had braces and brushing was a pain, however with the right equipment you can make if fairly quick and easy. I found that a toothbrush with soft bristles that weren't very coarse made it easier to really wiggle them under your brackets and around your wires; it was also a lot less painful at times. Although a toothbrush out of the store may be hard to find that has soft bristles try finding an old toothbrush that has been well used where the bristles have actually 'worn out' a little. I used my moms old one because she had just bought a new replacement. Just clean it really well before use, you can either go to the store and buy a toothbrush cleaning solution, or soak it in rubbing alcohol. Either way be sure to rinse it EXTREMELY well before use. Good luck!