For dental implant systems, clinical long-term follow-up examinations with high patient numbers are necessarily. Therefore, the following study evaluated the cumulative survival rate (CSR), the success criteria according to Albrektsson and Buser as well as the vertical bone loss of the TiOblast®-implant (n=216) in the edentulous, not-augmentated mandible in a 10-year follow-up examination. In 60 of those implants, an irradiation prior or post implantation had been conducted. The CSR of all implants was 94%, the CSP of the implants inserted prior or post radiation was 97%. Reasons for implant loss were insufficient bony healing (n=8) and periimplantitis (n=5). The analysis according to success criteria showed cummulative values of 86% (Albrektsson) and 91% (Buser). The vertical bone loss added up to a mean value of 2.2mm/year. In regard to the "critical" patients (28% of the implants in the irradiated mandible), the implant system showed, with an in situ rate of 94% after 10 years of clinical use, satisfying results. A mean bone loss of 2.2mm after 10 years seems to be acceptable Schlagwörter: Astra, TiOblast, implant, long-term results, edentulous mandible