Following extraction of the impacted mandibular canine, which involved the use of micromotor, the patient developed severe pain and ecchymosis as seen in the color plate. What can be the cause?

Surgery

Following extraction of the impacted mandibular canine, which involved the use of micromotor, the patient developed severe pain and ecchymosis as seen in the color plate. What can be the cause?

A tender swelling in submandibular triangle is mostly likely diagnosed as

In transfacial proportions, the face Is divided into how many segments:

Specific for Ankylosing spondylitis is true?