[Comparative experimental measurement of the stimulus threshold of the effect of the local anesthetic Ultracaine (Carticaine)].

For objectifying clinical experience, we measured and compared experimental stimulus thresholds with Ultracain 4% and Xylocain 2% in the upper and lower jaws in double blind tests. By means of electronically controlled rectangular impulses the latent period, depth and duration of anesthesia were registered. Relevant differences were found for plexus anesthesia in the lower jaw. The Ultracain preparation is characterized by a high capacity of bone penetration.