Objectives: Implant loss represents an important success criterion in dental implantations. However, in case of failure there is the possibility to implant again in the same localization. Nothing is known about the probability of success of a reimplantation. Goal of this study was to evaluate the success rate in such secondary implants.

Methods: 395 patients with 1541 implants were included in the analysis. 118 implants were lost during the study period (May 1984 - November 2004). After 5 years the Kaplan-Meier survival rate was determined 93% for primary implants. In 53 cases (44 %) a secondary implant was placed in the same position in order to compensate the loss after failure of the first implant. The re-implants were analyzed with regard to survival rate and further variables (time, gender, jaw, indication, size of implant).

Results: The secondary implantation took place at three different time frames: 8 immediate, 16 delayed (within first 3 month) and 28 late implantations (after 3 month). The 53 secondary implants were less successful than the 1541 primary implants. However, after 2 years 88 % and after 5 years 75 % were still in function.

Conclusions: Secondary implantations seem to be an encouraging method to compensate implant failures.

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