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Surface-modified zirconia implants: tissue response in rabbits.

Isabella Rocchietta1, Filippo Fontana, Alessandro Addis

  • 1Department of Periodontology, School of Dentistry, University of Milan, Milan, Italy. isabella.rocchietta@gmail.com

Clinical Oral Implants Research
|July 17, 2009
PubMed
Summary

Surface modifications on zirconia implants did not significantly improve bone integration or strength compared to oxidized titanium. Further chemical modifications on zirconia implants did not enhance bone-to-implant contact or interfacial shear strength.

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Area of Science:

  • Biomaterials Science
  • Dental Implantology
  • Orthopedic Research

Background:

  • Zirconia implants are explored as alternatives to titanium for dental applications.
  • Optimizing osseointegration is crucial for implant success, focusing on strength and speed.
  • Surface modifications aim to enhance the biological response and stability of dental implants.

Purpose of the Study:

  • To compare bone tissue response to zirconia implants with varied surface modifications against oxidized titanium.
  • To evaluate the potential of surface modifications to optimize osseointegration of zirconia implants.
  • To assess the impact of chemical modifications on topographically modified zirconia implants.

Main Methods:

  • A study involving 143 implants (123 zirconia, 20 titanium oxide controls) in 18 rabbits.
  • Zirconia implants featured three distinct surface topographies.
  • Evaluation included removal torque testing (RTQ) and histological analysis after 3 weeks.

Main Results:

  • No significant difference in interfacial shear strength between chemically modified and topographically modified zirconia implants.
  • No statistically significant difference in bone-to-implant contact between zirconia and control oxidized implants.
  • Study completion with 110 implants from 16 rabbits.

Conclusions:

  • Specific chemical modifications on topographically modified zirconia implants do not appear to enhance bone-to-implant contact.
  • Additional chemical modifications did not increase the interfacial shear strength of zirconia implants.
  • Zirconia implant surface modifications, in this study, did not outperform oxidized titanium controls in enhancing osseointegration.