Overdentures were consecutively inserted in 92 severely resorbed maxillae and followed for 1 year. The dentures were supported by a total of 430 implants. Of these, 69 (16%) became loose and were removed during the follow-up period. The mobile implants caused 7 complete failures of the overdenture treatment. Postinsertion maintenance was more extensive for the overdentures than for fixed prostheses supported by implants. Problems arose in relation to the mucosa around the implants, and there were also fatigue fractures of the acrylic resin and the retentive clips. Fewer speech problems were reported in the overdenture group when compared to those with fixed prostheses. Schlagwörter: Brånemark implants, complications, edentulous maxilla failures, overdenture, resorbed maxilla