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.
A toothbrush also has bristles.
All bristles are safe,
A toothbrush without bristles is often referred to as a toothbrush handle or a toothbrush base. It typically serves as the structural component that holds the bristles in place. In some contexts, it can also be seen as a placeholder or an incomplete toothbrush. Without bristles, it cannot effectively clean teeth.
Yes ,the bristles and the handles of toothbrush are made of the same material that is nylon.
The capitol of a toothbrush (most important part) is the bristles. Why am I answering this?
Yes ,the bristles and the handles of toothbrush are made of the same material that is nylon.
Nylon.
If nylon were soluble in water, using a toothbrush with nylon bristles would likely be impractical, as the bristles would dissolve and lose their effectiveness during use. A toothbrush requires durable, resilient bristles to effectively clean teeth, and soluble materials would not provide the necessary structure. Therefore, I would not choose a toothbrush with nylon bristles if they were soluble in water.
Helpful Friction.
it stands for the stiffness of the bristles but the lower the number the softer or harder?
No. The bristles of the brush will damage the soft tissue inside.
A riddle involving a toothbrush could be: "I have bristles but I'm not a broom, I help keep your smile bright in every room. What am I?" The answer, of course, is a toothbrush! This playful riddle highlights the toothbrush's function while engaging the listener's imagination.