Crestal bone loss due to abutment manipulation and an internal silver deposition implant design in a canine model

Abstract

Objective

The study aimed to evaluate the effect of internal silver coating as a countermeasure to crestal bone loss around implants with or without multiple abutment disconnections/reconnections.

Materials and methods

Following tooth extraction, 48 implants with connected healing abutments (24 implants internally coated with elemental silver) were placed in the mandible of eight beagle dogs. Two months after implant surgery one side of the mandible was randomly assigned to four abutment manipulations (disconnection/reconnection) on a weekly basis. At 4 months postoperative, biopsies were obtained and prepared for histomorphometric analysis.

Results

Healing abutment manipulation increased crestal bone remodeling when compared to no abutment manipulation (1.28 mm versus 0.92 mm, respectively), although the difference was not statistically significant (p = 0.0836). Overall, an internal silver coating did not provide a statistically sufficient implant treatment characteristic as a countermeasure to crestal bone loss (p = 0.7801).

Conclusions

These findings indicate that the controlled variables explored here (abutment manipulation/internal silver coating) have a limited effect on initial crestal bone loss.

Clinical relevance

Abutment manipulation during prosthetic work does not seem to harm the peri-implant soft and hard tissues.

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Acknowledgements

The authors acknowledge collegial collaborations with Drs. James N. Kenealy, Arndt Happe, and Markus B. Hürzeler, as well as the histological contributions of Michael Rohrer and Hari Prassad.

Funding

Partial support for this study was provided by Biomet 3i (now Zimmer Biomet Dental). Author SSK also acknowledges support from the National Institutes of Health (P20 MD003350).

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Correspondence to Sean S. Kohles.

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Fickl, S., Stappert, C.F.J. & Kohles, S.S. Crestal bone loss due to abutment manipulation and an internal silver deposition implant design in a canine model. Clin Oral Invest 25, 515–523 (2021). https://doi.org/10.1007/s00784-020-03416-z

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Keywords

  • Crestal bone regression
  • Internal silver coating
  • Abutment manipulation
  • Animal model
  • Histomorphometrics
  • Edentulous remodeling
  • Design countermeasure