With two episodes of right retromandibular angle subcutaneous emphysema during right upper molar crown preparation: A case report

Figure 6 The symptoms were similar to those on the first occasion. A and B: The emphysema was in the retromandibular area; the yellow arrows indicate the swelling; C-E: The teeth and gingiva were normal and healthy; F and G: Optical scans acquired using an oral scanner (3Shape, Copenhagen, Denmark) also revealed very good general health. However, beginning on the occlusion surface of #17, a subfissure line was found between the tooth and resin (blue arrow). Grinding at this point triggered subcutaneous emphysema in the retromandibular area.