• 

• 

• 

• 

• 

• 

This patient received an injection for restoration of an upper tooth on the left side. Two days later the patient returned with a severe hematoma involving the maxilla and the mandible. 

A hematoma, a blood clot resulting from hemorrhaging into surrounding tissues, occurs if a muscle fibre is penetrated or a blood vessel is perforated by the injection of the anaesthetic into the lower jaw. 

Usually warm moist heat applications, stretching exercises, and time is sufficient treatment.