[Radiographs and tooth roots in maxillary sinus]

Roentgenographic observations in 19 cases of tooth roots displacement to the maxillary sinus using 4 technics of periapical, topographic, Waters and panoramic projection. It was indicated that, 1). Left maxillary first molar root was forced into the antrum more frequently than the roots of other teeth. 2). Roots were displaced into sinus more frequently in males than females. 3). To identify the root, panoramic and topographic were helpful projection. Waters projection was of little or no value, for the root fragment. However it is useful in that it may provide indirect confirmatory evidence of an antral perforation and reveals the presence of sinus infection.