[Transnasal, endoscopical sinus surgery for chronic sinusitis. II. Endonasal operation of the maxillary antrum (author's transl)].

Basing on a biomechanical concept of the surgical rehabilitation of the paranasal mucosa, technique and results of 357 endonasal antrostomies are reported. Particular features were: 1) The establishment of large window in the inferior meatus; with an additional window in the middle meatus, if diffuse polyposis was present. 2) The preservation of the parietal mucosa, while polyps and cysts were removed. 3) The use of a new suction-irrigation-endoscope for optical control. - While satisfactory results were achieved in percentages, at least equalling those of the Caldwell-Luc procedure, the absence of both severe complications and postoperative discomfort classifies the described technique as superior to the transoral approach of Caldwell-Luc. Its indications for all forms of chronic maxillary sinusitis are emphasized.