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Many surgical techniques have been described for the treatment of recurrent or persistent
frontal sinusitis. The major difficulty of all techniques is to avoid recurrent
stenosis of the frontonasal duct. Our endoscopic surgical technique without an
external approach is described, which allows the creation of a bony and rigid frontonasal
duct. Our first results seem to confirm the hypothesis that the creation of such a
duct reduces the frequency of secondary stenosis and therefore the recurrencies of
frontal sinusitis.