AIM: To study the pathological changes of maxillary sinus in the patients after conventional maxillary radical treatment, Caldwell-Lucoperation, and discuss its clinic significance.
目的：研究传统上颌窦根治术后上颌窦局部骨质增生与瘢痕形成的病理改变情况，并讨论其临床意义。
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Objective: To compare endoscopy maneuver with Caldwell-lucoperation for the treatment of chronic.