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.
A 32-year-old female patient in healthy conditions attended for extraction of second maxillary right premolar. Immediately after buccal infiltration, a white patch appeared lateral to the nasolabial fold [].