Masticatory myofascial pain is the one of the most common etiologies for nonodontogenic pain, often characterized by the presence of trigger points. Conventional management includes approaches such as jaw exercises, physical therapy, intraoral appliances, medications, and trigger point injections. Peripheral/regional nerve blocks have shown to be effective in managing myogenous pain conditions. The twin block is a nerve block that blocks both the masseteric and the anterior deep temporal nerves. The objective of this case series is to illustrate expeditious and sustained efficacy of the twin block in the management of chronic masticatory myofascial pain. Schlagwörter: chronic myofascial pain, trigger point injections, twin block