1·The teardrop sign is secondary to opacification of the upper maxillary sinus from herniated orbital fat.
泪滴征是继发于眶内脂肪疝入上颌窦导致的浑浊。
2·A dilute solution of 5-10 MLS sodium hypochlorite was inadvertently injected into the maxillary sinus during root canal therapy of a right upper second premolar (5).