Cargando…

New Resin-Based Bulk-Fill Composites: in vitro Evaluation of Micro-Hardness and Depth of Cure as Infection Risk Indexes

The current in vitro study evaluated the Vickers hardness number (VHN) and hardness ratio of four bulk-fill composites (VisCalor bulk; Admira Fusion x-tra; x-tra fil; and GrandioSO x-tra-Voco, Cuxhaven, Germany) to assess the risk of bacterial colonization in comparison with standard composite mater...

Descripción completa

Detalles Bibliográficos
Autores principales: Colombo, Marco, Gallo, Simone, Poggio, Claudio, Ricaldone, Vittorio, Arciola, Carla Renata, Scribante, Andrea
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7143874/
https://www.ncbi.nlm.nih.gov/pubmed/32183115
http://dx.doi.org/10.3390/ma13061308
_version_ 1783519713966424064
author Colombo, Marco
Gallo, Simone
Poggio, Claudio
Ricaldone, Vittorio
Arciola, Carla Renata
Scribante, Andrea
author_facet Colombo, Marco
Gallo, Simone
Poggio, Claudio
Ricaldone, Vittorio
Arciola, Carla Renata
Scribante, Andrea
author_sort Colombo, Marco
collection PubMed
description The current in vitro study evaluated the Vickers hardness number (VHN) and hardness ratio of four bulk-fill composites (VisCalor bulk; Admira Fusion x-tra; x-tra fil; and GrandioSO x-tra-Voco, Cuxhaven, Germany) to assess the risk of bacterial colonization in comparison with standard composite materials. Thirty samples were prepared for each group. The VHN of both the external (top) and internal surface (bottom) was determined with a micro-hardness tester (200 g load for 15 s), and the hardness ratio was also calculated for each sample. Subsequently, storage in an acidic soft drink (Coca-Cola, Coca-Cola Company, Milano, Italy) was performed; for each group, 10 samples were stored for 1 day, while another 10 were stored for 7 days and the remaining 10 were kept in water as controls. A significant reduction in VHN was shown for all the groups when comparing the external versus internal side (P < 0.05), although the hardness ratio was greater than 0.80, resulting in an adequate polymerization. Regarding the acid storage, all the groups showed a significant decrease of VHN when compared with the controls, both after 1 day (P < 0.05) and after 7 days (P < 0.001). All the products showed adequate depth of cure without further risk of bacterial colonization. However, acid exposure negatively affected micro-hardness values, which might promote subsequent colonization.
format Online
Article
Text
id pubmed-7143874
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-71438742020-04-14 New Resin-Based Bulk-Fill Composites: in vitro Evaluation of Micro-Hardness and Depth of Cure as Infection Risk Indexes Colombo, Marco Gallo, Simone Poggio, Claudio Ricaldone, Vittorio Arciola, Carla Renata Scribante, Andrea Materials (Basel) Article The current in vitro study evaluated the Vickers hardness number (VHN) and hardness ratio of four bulk-fill composites (VisCalor bulk; Admira Fusion x-tra; x-tra fil; and GrandioSO x-tra-Voco, Cuxhaven, Germany) to assess the risk of bacterial colonization in comparison with standard composite materials. Thirty samples were prepared for each group. The VHN of both the external (top) and internal surface (bottom) was determined with a micro-hardness tester (200 g load for 15 s), and the hardness ratio was also calculated for each sample. Subsequently, storage in an acidic soft drink (Coca-Cola, Coca-Cola Company, Milano, Italy) was performed; for each group, 10 samples were stored for 1 day, while another 10 were stored for 7 days and the remaining 10 were kept in water as controls. A significant reduction in VHN was shown for all the groups when comparing the external versus internal side (P < 0.05), although the hardness ratio was greater than 0.80, resulting in an adequate polymerization. Regarding the acid storage, all the groups showed a significant decrease of VHN when compared with the controls, both after 1 day (P < 0.05) and after 7 days (P < 0.001). All the products showed adequate depth of cure without further risk of bacterial colonization. However, acid exposure negatively affected micro-hardness values, which might promote subsequent colonization. MDPI 2020-03-13 /pmc/articles/PMC7143874/ /pubmed/32183115 http://dx.doi.org/10.3390/ma13061308 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Colombo, Marco
Gallo, Simone
Poggio, Claudio
Ricaldone, Vittorio
Arciola, Carla Renata
Scribante, Andrea
New Resin-Based Bulk-Fill Composites: in vitro Evaluation of Micro-Hardness and Depth of Cure as Infection Risk Indexes
title New Resin-Based Bulk-Fill Composites: in vitro Evaluation of Micro-Hardness and Depth of Cure as Infection Risk Indexes
title_full New Resin-Based Bulk-Fill Composites: in vitro Evaluation of Micro-Hardness and Depth of Cure as Infection Risk Indexes
title_fullStr New Resin-Based Bulk-Fill Composites: in vitro Evaluation of Micro-Hardness and Depth of Cure as Infection Risk Indexes
title_full_unstemmed New Resin-Based Bulk-Fill Composites: in vitro Evaluation of Micro-Hardness and Depth of Cure as Infection Risk Indexes
title_short New Resin-Based Bulk-Fill Composites: in vitro Evaluation of Micro-Hardness and Depth of Cure as Infection Risk Indexes
title_sort new resin-based bulk-fill composites: in vitro evaluation of micro-hardness and depth of cure as infection risk indexes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7143874/
https://www.ncbi.nlm.nih.gov/pubmed/32183115
http://dx.doi.org/10.3390/ma13061308
work_keys_str_mv AT colombomarco newresinbasedbulkfillcompositesinvitroevaluationofmicrohardnessanddepthofcureasinfectionriskindexes
AT gallosimone newresinbasedbulkfillcompositesinvitroevaluationofmicrohardnessanddepthofcureasinfectionriskindexes
AT poggioclaudio newresinbasedbulkfillcompositesinvitroevaluationofmicrohardnessanddepthofcureasinfectionriskindexes
AT ricaldonevittorio newresinbasedbulkfillcompositesinvitroevaluationofmicrohardnessanddepthofcureasinfectionriskindexes
AT arciolacarlarenata newresinbasedbulkfillcompositesinvitroevaluationofmicrohardnessanddepthofcureasinfectionriskindexes
AT scribanteandrea newresinbasedbulkfillcompositesinvitroevaluationofmicrohardnessanddepthofcureasinfectionriskindexes