STA painless anesthesia technology is currently the most advanced computer-controlled local anesthesia injection technology, its painless, minimally invasive, needle stealth performance to children’s dental treatment gospel, greatly reducing the baby’s fear of anesthetic injection before dental care, the technology system has the following advantages: 1. Minimize the pain: STA technology system slow injection speed can avoid the accumulation of drug caused by a sudden rise in pressure in the tissue caused by pain in the child, which helps to reduce the pain level of periodontal membrane and palatal anesthesia. The slow injection speed also provides the possibility of a pre-puncture technique, where the drug is drained in front of the needle tip to form an anesthetic channel, which can reduce the discomfort during needle insertion. Its to some extent can make local anesthesia more comfortable and reduce the pain of the child during the injection. Zhang Zengfang, Department of Pediatric Dentistry, Workshop