dc.creator | Velasco-Ortega, Eugenio | es |
dc.creator | Jiménez Guerra, Álvaro | es |
dc.creator | Ortiz García, Iván | es |
dc.creator | Núñez Márquez, Enrique | es |
dc.creator | Gil, Javier | es |
dc.creator | Delgado, Luis M. | es |
dc.creator | Rondón-Romero, José Luis | es |
dc.creator | Monsalve Guil, Loreto | es |
dc.date.accessioned | 2024-07-03T13:22:40Z | |
dc.date.available | 2024-07-03T13:22:40Z | |
dc.date.issued | 2024-01 | |
dc.identifier.citation | Velasco-Ortega, E., Jiménez Guerra, Á., Ortiz García, I., Núñez Márquez, E., Gil, J., Delgado, L.M.,...,Monsalve Guil, L. (2024). Silver coating on dental implant-abutment connection screws as potential strategy to prevent loosening and minimizing bacteria adhesion. Frontiers in Bioengineering and Biotechnology, 11, 1293582. https://doi.org/10.3389/fbioe.2023.1293582. | |
dc.identifier.issn | 2296-4185 | es |
dc.identifier.uri | https://hdl.handle.net/11441/161061 | |
dc.description.abstract | Introduction: One of the main problems for the long-term behavior of dental
implants are loosening of the implant-abutment connection screws and bacterial
infiltration. The aim of this work is to increase the screw fixation by silver coating,
providing superior mechanical retaining and antibacterial effect.
Methods: Eighty dental implants with their abutments and screws have been
studied. Twenty screws were not coated and were used as a control while the rest
of screws were silver coated by sputtering, with three different thickness: 10,
20 and 40 μm and 20 screws per each thickness. Coating morphology and
thickness were determined by scanning electron microscopy using image
analysis systems. The screws were tightened for each of the thicknesses and
the control with two torques 15 Ncm and 20 Ncm and tested under mechanical
fatigue simulating oral stresses up to a maximum of 500,000 cycles. The
remaining torques at different cycles were determined with a high-sensitivity
torquemeter. Cell viability assays were performed with SaOs-2 osteoblasts and
microbiological studies were performed against Streptococcus gordonii and
Enterococcus faecalis bacteria strains, determining their metabolic activity and
viability using live/dead staining.
Results: It was observed a decrease in torque as cycles increase. For a preload of
15 Ncm at 100,000 cycles, the loosening was complete and, for 20 Ncm at
500,000 cycles, 85% of torque was lost. The silver coatings retained the torque,
especially the one with a thickness of 40 μm, retaining 90% of the initial torque at
500,000 cycles. It was observed that osteoblastic viability values did not reach
70%, which could indicate a slight cytotoxic effect in contact with cells or tissues;
however, the screw should not be in direct contact with tissue or living cells. Silver
coating induced a significant reduction of the bacteria metabolic activity for
Streptococcus gordonii and Enterococcus faecalis, around 90% and 85%
respectively. Discussion: Therefore, this coating may be of interest to prevent loosening of
implant systems with a worthy antibacterial response. | es |
dc.format | application/pdf | es |
dc.format.extent | 9 p. | es |
dc.language.iso | eng | es |
dc.publisher | Frontiers Research Foundation; Frontiers media S.A. | es |
dc.relation.ispartof | Frontiers in Bioengineering and Biotechnology, 11, 1293582. | |
dc.rights | Atribución 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | * |
dc.subject | Silver coating | es |
dc.subject | Dental implants | es |
dc.subject | Screws loosening | es |
dc.subject | Antibacterial coating | es |
dc.subject | Tightening | es |
dc.title | Silver coating on dental implant-abutment connection screws as potential strategy to prevent loosening and minimizing bacteria adhesion | es |
dc.type | info:eu-repo/semantics/article | es |
dc.type.version | info:eu-repo/semantics/publishedVersion | es |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Estomatología | es |
dc.relation.publisherversion | https://www.frontiersin.org/journals/bioengineering-and-biotechnology/articles/10.3389/fbioe.2023.1293582/full | es |
dc.identifier.doi | 10.3389/fbioe.2023.1293582 | es |
dc.contributor.group | Universidad de Sevilla. CTS618: Investigación Básica y Clínica en Implantología Oral. | es |
dc.journaltitle | Frontiers in Bioengineering and Biotechnology | es |
dc.publication.volumen | 11 | es |
dc.publication.initialPage | 1293582 | es |