Document Detail

Influence of surface roughness on streptococcal adhesion forces to composite resins.
MedLine Citation:
PMID:  21524789     Owner:  NLM     Status:  Publisher    
OBJECTIVE: To determine streptococcal adhesion forces with composite resins with different surface roughness. METHODS: Polishing and grinding were applied to obtain smooth (roughness 20nm), moderately rough (150nm) and rough (350nm) surfaces of two orthodontic, light-cured composites. Adhesion forces between Streptococcus sanguinis and Streptococcus mutans and the composite surfaces were measured using atomic force microscopy in absence or presence of a salivary conditioning film. Initial adhesion forces were measured as well adhesion after 120s of contact, as longer contact times are known to result in stronger adhesion forces ("bond-strengthening"). Surface roughness in absence and presence of salivary conditioning films were compared using ANOVA, while adhesion forces were subjected to a Weibull analysis. RESULTS: Initial adhesion forces in absence of a salivary conditioning film amounted between -0.7 and -0.9nN for smooth composite resins and increased between -1.0 and -2.0nN for the roughest surfaces. Streptococcal adhesion forces after bond-strengthening were significantly stronger than upon initial contact, irrespective of the composite type. Salivary conditioning films significantly decreased the surface roughness of the composites, as well as the streptococcal adhesion forces. Yet, also in the presence of a conditioning film, rougher composite surfaces exerted stronger adhesion forces, irrespective of composite type or bacterial strain. CONCLUSION: Streptococcal adhesion forces to orthodontic composite resins increase with increasing roughness of the composite surfaces. Composite surface roughness less affects adhesion forces with S. mutans than with S. sanguinis.
Li Mei; Henk J Busscher; Henny C van der Mei; Yijin Ren
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-4-25
Journal Detail:
Title:  Dental materials : official publication of the Academy of Dental Materials     Volume:  -     ISSN:  1879-0097     ISO Abbreviation:  -     Publication Date:  2011 Apr 
Date Detail:
Created Date:  2011-4-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8508040     Medline TA:  Dent Mater     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.
Department of Biomedical Engineering, University Medical Center Groningen and University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands; Department of Orthodontics, University Medical Center Groningen and University of Groningen, Groningen, Hanzeplein 1, 9700 RB Groningen, The Netherlands.
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