(1) Browne in his study of 81 cases of dentigerous cyst found mucous cells in 30% of mandibular and 53% of maxillary cysts
. (2) In the present study mucous cells were found in 20 % of mandibular cyst and 50% of maxillary cysts
In the head and neck, it affects mainly the posterior region of the mandible (Ferreira Jr., Damante, & Lauris, 2004; Homem de Carvalho et al., 2010; Velez et al., 2010), between the canines and third molars (Kumar, Sherubin, Raman, & Shettar, 2011; Mupparapu et al., 2008), representing one percent of maxillary cysts
(Damante, Guerra, & Ferreira Jr., 2002; Harnet et al., 2008; Saia, Fusetti, Emanuelli, Ferronato, & Procopio, 2012).
Other causes of OAC/OAF include tuberosity fracture, dentoalveolar/periapical infections of molars, implant dislodgement into maxillary sinus, trauma (7.5%), presence of maxillary cysts
or tumors (18.5%), osteoradionecrosis, flap necrosis, dehiscence following implant failure and sometimes as a complication of the Caldwell-Luc procedure.15
(9) The lesions observed in out patient were of the dentigerous variety, because unerupted teeth were visible in both the mandibular and maxillary cysts
on CT and MRI.
In others, pain, swelling, expansion, drainage, and bone perforation are reported.4,8 Buccal cortical plate expansion was noticed which is seen in only one third cases of maxillary cysts
. Whereas in OKC the extension is more in anteroposterior direction and the pressure of the fluid is quite low and grows by extension rather than by expansion.