Newsletter
FRANKFURT AM MAIN, Germany: A new study involving more than 12,500 implants manufactured by DENTSPLY Implants, a Swedish specialist in patient-specific implant solutions, has demonstrated a high survival rate of the company’s ANKYLOS implants over a period of 20 years. In addition, the study found low rates of peri-implant bone loss.
In the study, 12,737 ANKYLOS implants were placed in 4,206 patients between April 1991 and May 2011. The implants were placed in men and women aged 50 to 70. In contrast to other studies, the study population also included smokers and patients with bruxism. At baseline and once a year during the follow-up period, bone quality, bone mass, indication class, and implant length and diameter were measured.
In 2012, researchers at the Department of Oral Surgery and Implantology at Goethe University Frankfurt evaluated the data and found a cumulative survival rate of 93.3 per cent. A total of 319 implants failed, resulting in an absolute survival rate of 97.5 per cent. According to the researchers, most failures occurred during the first year after implant placement and before prosthesis delivery, indicating insufficient osseointegration. In addition, the implants showed an average bone loss of less than 1 mm.
Moreover, the researchers found that the cumulative survival rate was significantly higher in female patients (93.7 per cent) than in their male counterparts (92.8 per cent). They also observed that a significantly higher number of implants placed in the mandible and in hard bone failed than those placed in the maxilla or in weak or normal bone.
According to DENTSPLY Implants, the long-term survival rate can be attributed to the design of the ANKYLOS system, particularly its broad platform switch and self-locking cone connection.
The study, titled “Long-term evaluation of ANKYLOS dental implants, Part I: 20-year life table analysis of a longitudinal study of more than 12,500 implants”, was published online on 16 September in the Clinical Implant Dentistry and Related Research journal.
