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Alumina-toughened zirconia (ATZ) implants demonstrate strong five-year survival rates, with no significant difference observed between one and five years. Peri-implant bone loss and patient-reported outcomes remained stable, indicating good long-term performance.

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Area of Science:

  • Dental Implantology
  • Biomaterials Science
  • Prosthodontics

Background:

  • Alumina-toughened zirconia (ATZ) is a ceramic material used in dental implants.
  • Long-term survival and outcomes of ATZ implants require further investigation.
  • Assessing peri-implant bone loss, soft tissue health, and patient satisfaction is crucial for evaluating implant success.

Purpose of the Study:

  • To assess the five-year survival rate of ATZ implants.
  • To evaluate peri-implant marginal bone loss (MBL), soft tissue health, and patient-reported outcome measures (PROMs) over five years.
  • To compare ATZ implant survival between one and five years post-operatively.

Main Methods:

  • A monocentre cohort study involving 40 patients with 53 ATZ implants.
  • Clinical parameters including probing depth, bleeding index, and plaque index were recorded.
  • Standardised radiographs were used to evaluate marginal bone loss (MBL).
  • Patient-reported outcome measures (PROMs) assessed satisfaction with function, aesthetics, and self-esteem using a visual analogue scale (VAS).

Main Results:

  • The five-year survival rate for ATZ implants was 94.3%, with all failures occurring before definitive restoration.
  • No significant difference in implant survival was found between one and five years.
  • A mean MBL of 0.71 mm was observed from placement to restoration, with minimal change thereafter (0.78 mm at one year, 0.81 mm at five years).
  • Significant increases in probing depth, plaque index, and bleeding index were noted, though oral hygiene remained good.
  • Patient-reported outcomes showed significant improvements over the five-year period, particularly in aesthetics and sense.

Conclusions:

  • ATZ implants exhibit favorable five-year survival rates in a select patient cohort.
  • The study supports the long-term stability of ATZ implants concerning marginal bone loss and soft tissue health.
  • Patient satisfaction and perceived outcomes significantly improve post-implantation and are maintained over five years.