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 25-year-old man and ASA class I []. Mandibular inferior alveolar nerve block (Halsted’s technique) and long buccal nerve were used for dental implant insertion in the mandibular right quadrant. Facial blanching and palatal–buccal mucosa whitening occurred.