1. Objective:To evaluate the distortion rate of dental implant bed in the jaw by the orthopantomography.
目的：探讨颌骨不同种植部位在曲面断层片上的失真率。
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2. It's displayed in orthopantomography that 3 teeth impacted in maxillary sinus and 2 cases of maxillary molars were buccolingually and horizontally impacted.
曲面体层片显示3例位于上颌窦内，2例上颌后牙颊舌向水平埋伏阻生。
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3. It's displayed in orthopantomography that 3 teeth impacted in maxillary sinus and 2 cases of maxillary molars were buccolingually and horizontally impacted.
