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Zupnik J, Kim S-W et al. J Periodontol 2011; 82: 1390–1395

The title of this paper maybe disingenuous. It is not stated if the 341 implants were placed before or during the 4-year observational period. If the latter, the outcome of some of the implants may have been followed only for a short period of time. Another study limitation is only those records of patients that could be accessed were included in their data set. Nevertheless, it is reported that there were significantly higher failure rates, albeit small, of implants placed in those patients with diabetes and those who were male. It was also found that sandblasted large grit, acid-etched implants (Straumann, Basel, Switzerland) were significantly less likely to fail than oxidised titanium implants (TiUniteâ„¢, Nobel Biocare, Zurich, Switzerland). However, three times as many Straumann implants were placed.