Abstract
Objectives
The aim was to evaluate the rate of bone loss progression during experimentally induced peri-implantitis using two different implant-abutment connections in implants with identical surface topography.
Material and methods
Forty-eight Regular Neck tissue-level SLA implants with a matching implant to abutment connection (TL) and 36 bone-level SLA implants with a switching platform implant to abutment connection (BL) were subjected to experimental peri-implantitis in two independent in vivo pre-clinical investigations. Experimental peri-implantitis was induced by means of silk ligatures during 3 months (induction phase), and followed for one extra month without ligatures (progression phase). Radiographic and clinical outcomes were evaluated longitudinally along both studies and subsequently compared between experiments.
Results
During the induction phase, radiographic bone loss was significantly higher in implants with matched abutments compared with those with platform switching connections (2.65 ± 0.66 mm vs 0.84 ± 0.16 mm, respectively, p = 0.001). During the progression phase, both types of implant-abutment connection exhibited similar rates of radiographic bone loss. Similar outcomes were observed clinically.
Conclusions
A platform switching connection resulted in a more benign development of peri-implantitis during the experimental induction phase of the disease. These differences, however, disappeared once the ligatures were removed (progression phase).
Clinical relevance
Influence of the implant-abutment connection in peri-implantitis progression may be relevant when considering implant selection in the moment of placement. In this sense, platform switching abutment demonstrated less peri-implantitis development when compared to implant matching connection.
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Acknowledgments
The authors would like to express their appreciation to personnel of the Rof Codina research facilities, Faculty of Veterinary, University of Santiago de Compostela, Lugo, for their invaluable support with the care of the animals and the histological preparation and measurements, specially to Maria Permuy.
Funding
The work was supported by the joint collaboration between Periodontology Department of University Complutense of Madrid as well as Periodontology Department of University of Santiago de Compostela, both in Spain. This study was self-funded by the ETEP Research Group, UCM-Madrid, and the Clinic of Periodontology of the School of Medicine and Dentistry, University of Santiago de Compostela, Spain and the Center of Biofunctional Studies, Complutense University, Madrid, Spain.
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• Javier Sanz-Esporrin: data retrieval, data analysis, helped in surgical procedures, and writing the manuscript.
• Cristina Carral: data retrieval, helped in surgical procedures, and editing the manuscript.
• Juan Blanco: surgeries in dogs, conceived the ideas, supervised the writing.
• Jose Sanz-Casado: surgeries in dogs, conceived the ideas, supervised the writing.
• Fernando Muñoz: histological preparation, histometrical measurements, critical histological analysis.
• Mariano Sanz: protocol design and manuscript writing and editing.
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Sanz-Esporrin, J., Carral, C., Blanco, J. et al. Differences in the progression of experimental peri-implantitis depending on the implant to abutment connection. Clin Oral Invest 25, 3577–3587 (2021). https://doi.org/10.1007/s00784-020-03680-z
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DOI: https://doi.org/10.1007/s00784-020-03680-z