A 25-year-old male patient presented to the department of maxillofacial surgery with complaints of pain during eating, which arose three days ago after an injury. Objectively: the face is asymmetric due to the swelling of the buccal and infraorbital regions on the left. Mouth opening is slightly restricted because of pain. Maxillary alveolar process and left maxillary teeth are mobile. There is a hemorrhage along the left mucogingi-val junction in the region of the said teeth; the site is tender to palpation. What diagnosis can be assumed?