The patient was a 22-year-old woman who referred for mandibular right wisdom tooth removal. Lidocaine 2% and epinephrine 1:80,000 were used for inferior alveolar nerve block. Facial, buccal, and palatal blanching occurred on the side of injection. She felt numbness in the periorbital and lower lip. The color of the face returned to preinjection condition after 10minutes [].
The patient was a 63-year-old man who attended for right maxillary sinus lift procedure. On the basis of previous heart problems, epinephrine was not used in the local anesthetic cartridge. Maxillary block injection from greater palatine canal approach was used for obtaining profound anesthesia. Facial and palatal blanching occurred immediately after the injection, and the patient felt burning and itching sensation on the face [].