Discussion
Out of 189 implants nine were explanted prematurely. Since all except for one exception
were not yet prosthetically restored because of the too short implant duration (mean value 3.5 months), prosthetic restoration as possible cause for explantation is not discussed further in the present study. It is not new that failures occur primarily within the healing phase and this is described in many studies. Albrektsson et al. [4]
even go so far as to start the assessment of the success of an implant only after the first year insitu, which would significantly improve the success statistics in the present study.