Surgery The sudden appearance Dumb-bell shaped swelling during third molar nerve block is mainly due to: A Injection in pterygoid plexus B Injection in parotid gland C Injection into internal maxillary artery D Injection into nasal cavity 💡 Explanation The sudden appearance Dumb-bell shaped swelling during third molar nerve block is mainly due to: ✓ Correct Answer: C. Injection into internal maxillary artery