Nowadays as the technology develops itself, the needles are being replaced by digital needles. The difference separates digital needles than traditional anesthetical needles is that the digital needles cause barely no pain. Digital needles inject the anesthetical matter according to patients’ pressure of tissue. This is why, as the pressure is adjusted for patients’ sensitivity or pain level, the sense of pain is much more less than old system caused, yet some patients don’t even feel the pain of needle. The anesthetical matter is the same as used on traditional anesthetical needles.