The DHT (dental hi tec) presents SleeperOne and QuickSleeper electronic anaesthesia systems also known as cclads (computer controlled local anesthestic delivery system). They improve the performance of all types of anesthesia with unequalled effectiveness on mandible molars, teeth with pulpitis or cavities, for implantology, periodontology, endodontics, extractions, prosthetics. The use of vasoconstrictors such as epinephrine (adrenaline) are safe with osteocentral or transcortical anesthesias. By using dentalhitec needles which incise, they are the most painfree and effective systems for intraligamentary, intraseptal, nerve block, infiltration anesthesia, even for children. Osteocentral and transcortical (Intraosseous) are easy to perform, instantaneous, painless and efficient.