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Updated: Feb 3, 2026

Oral Biofilm Formation on Different Materials for Dental Implants
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Anodised or turned dental implants?

Natacha Reis1, Marco Bergamini1, Thamar Silvestre1

  • 1New York University, College of Dentistry, New York, USA.

Evidence-Based Dentistry
|October 27, 2018
PubMed
Summary

Turned implants show a significantly higher failure rate compared to anodised-surface implants. However, both implant types demonstrated no significant difference in marginal bone loss (MBL).

Area of Science:

  • Dental Implantology
  • Biomaterials Science
  • Oral Surgery

Background:

  • Dental implant surface treatments, such as machining (turned) and anodisation (e.g., TiUnite), influence implant performance.
  • Understanding comparative failure rates, marginal bone loss (MBL), and infection risk is crucial for selecting optimal implant surfaces.

Purpose of the Study:

  • To systematically compare the failure rates, MBL, and post-operative infection between turned (machined) and anodised-surface dental implants.
  • To evaluate the influence of implant surface type on clinical outcomes in dental implantology.

Main Methods:

  • Conducted an electronic search across multiple databases (PubMed/Medline, Web of Science, Cochrane Oral Health Group Trials Register) and manual searches.
  • Included human clinical studies (randomized or non-randomized) comparing turned vs. anodised-surface implants from the same manufacturer.

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  • Utilized the Newcastle-Ottawa Scale (NOS) for quality assessment; performed meta-analysis for failure rates and MBL.

    • Main Results:

    • Turned implants exhibited a statistically significant 2.82-fold higher risk of failure compared to anodised-surface implants (P < 0.00001).
    • No statistically significant difference in marginal bone loss (MBL) was observed between turned and anodised implants (MD = 0.02 mm, P = 0.82).
    • Meta-analysis for post-operative infection was not feasible due to insufficient data.

    Conclusions:

    • Turned implants present a statistically higher probability of failure than anodised-surface implants, irrespective of placement location (maxilla or mandible).
    • The choice between turned and anodised implant surfaces did not significantly impact marginal bone loss in the included studies.
    • Further research is needed to compare post-operative infection rates due to data limitations; results should be interpreted cautiously.