An infected root is accidentally displaced into the maxillary sinus. Examination of the socket reveals perforation of the sinus lining. Therapy should consist of 1. acrylic template to cover socket opening and saline rinses. 2. closure of oro-antral communication and antibiotic coverage. 3. antibiotic coverage and observation. 4. antrostomy for retrieval of root.
(2) and (4)
(4) only
All of the above
(1) (2) (3)
(1) and (3)
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