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Four-year treatment and radiographic outcomes of 1-piece implants used in immediate function: a prospective study in a single private practice.

The aim of this study was to prospectively evaluate treatment outcomes of 1-piece implants (NobelDirect and NobelPerfect, Nobel Biocare AB, Gothenberg, Sweden) in routine private clinical practice. Forty-seven implants placed in 30 subjects demonstrated a cumulative survival rate of 97.9% with stable marginal bone levels after 4 years of loading.