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

Figure 2 Subcutaneous emphysema is clearly evident in the right retromandibular angle. The skin temperature rose and the skin became red. Mouth-opening was not restricted and the patient felt no pain in the region of swelling. Yellow arrows: Subcutaneous emphysema. A: Front view; B: Profile view; C: Profile view while mouth opening.