In total, 189 zirconia implants were examined in
71 test subjects. However, as required only one
implant determined with the chance generator
per test subject was included in the survival
analysis according to Kaplan and Meier [11]
(n = 71), to guarantee the independence of the
examined implants.
53 out of 71 implants (74.6%) were so-called
«standard sites» with suffi cient soft tissue and
bone available. Subsequent fi xed restoration