Antral fistula is most common after extraction of:
(d) 1st molar(Ref. Scott Brown, 6th ed., 1/5/25)The floor of the maxillary sinus is related to 2nd premolar and 1st molar. Therefore extraction of these teeth can lead to an oro-antral fistula.
2nd incisor
1st premolar
3rd molar
1st molar
Congenital Lesions and Stridor