The purpose of this experimental in vivo investigation was to evaluate the influence of modifying the implant surface by adding a monolayer of multi-phosphonate molecules on the development of experimental peri-implantitis.
Material and methods
Eight beagle dogs received 5 tests and 5 control implants each following a split-mouth design 3 months after premolar and molar extraction. On the most mesial implant of each side, a 3-mm buccal dehiscence was artificially created. Experimental peri-implantitis was induced by silk ligatures over a 4-month period; after ligature removal, peri-implantitis was left to progress for another 4 months without plaque control. Clinical, histological, and radiographic outcomes were evaluated.
Radiographically, both implant groups showed a similar bone loss (BL) at the end of the induction and progression phases. BL measured on the histological sections of the test and control groups was 3.14 ± 0.42 mm and 3.26 ± 0.28 mm, respectively; the difference was not statistically significant (p > 0.05). The remaining buccal bone to implant contact (bBIC) percentage of the test and control groups was 59.38 ± 18.62 and 47.44 ± 20.46%, respectively; the difference, however, was not statistically significant (p > 0.05). Bone loss observed at dehiscent sites compared to non-dehiscent ones showed no statistically significant difference (p > 0.05).
Addition of a monophosphonate layer to a moderately rough implant surface did not affect development of experimental peri-implantitis.
Influence of implant surface on peri-implantitis may condition implant selection by the clinician, especially on patients with disease risk factors. In that sense, monophosphate layer implants do not show higher peri-implantitis risk than control implants.
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The authors would like to express their appreciation to the personnel of the Rof Codina research facilities, for their invaluable support with the care of the animals. Also, the authors would like to acknowledge the support with the histological processing made by Fernando Muñoz’s research team.
This study was partially funded through a research contract between the University Complutense of Madrid and MIS Implants (Israel).
Conflict of interest
The authors declare that they have no conflict of interest.
All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.
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Sanz-Esporrin, J., Di Raimondo, R., Pla, R. et al. Experimental peri-implantitis around titanium implants with a chemically modified surface with a monolayer of multi-phosphonate molecules: a preclinical in vivo investigation. Clin Oral Invest 25, 3789–3800 (2021). https://doi.org/10.1007/s00784-020-03708-4
- Experimental peri-implantitis
- Animal model
- Dental implants
- Implant surface
- Monophosphonate layer
- Wound chamber
- Histometric analysis