During extraction of the upper first molar, the mesio buccal root is missing and is suspected to have been pushed into the maxillary sinus. To close a oro antral fistula which of the flaps cannot be used

Surgery

During extraction of the upper first molar, the mesio buccal root is missing and is suspected to have been pushed into the maxillary sinus. To close a oro antral fistula which of the flaps cannot be used

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?