1,722,872 research outputs found
Possibile ruolo degli oppiati endogeni nella ridotta secrezione insulinica nel diabete non insulinodipendente
No full textInfluenza del metroprololo sul metabolismo glico-lipidico nel diabete mellito non insulina dipendente
No full textEffetti della calcitonina sulla secrezione endocrino pancreatica e sulla tolleranza ai carboidrati nell’uomo
No full textADHESION AND BIOFILM FORMATION BY PERIODONTOPATHOGENIC BACTERIA ON DIFFERENT COMMERCIAL BRACKETS
No full textObjective.
To compare early bacterial adhesion and biofilm formation in vitro by common and uncommon periodontal pathogens on a variety of commercial brackets.
Matherials and Methods
Adhesion and biofilm formation in vitro of 4 bacterial strains on 15 different commercial brackets, in standard culture mediums complemented or not with either serum or human saliva was evaluated by quantitative real time PCR after extraction of bacterial DNA.
Results.
Materials significantly influenced bacterial adhesiveness in a species specific way. Titanium and gold brackets constantly yielded the lowest values with all tested bacteria and in all tested conditions. Bracket materials and medium of growth significantly influenced biofilm formation.
Conclusions.
Materials and environmental conditions significantly influence biofilm formation by periodontal pathogens at the surface of brackets. Whenever possible brackets should be kept far from the gingival margin and if this is not possible, brackets made of gold, titanium, and ceramic should be preferentially used
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
ADHESION AND BIOFILM FORMATION BY ORAL STREPTOCOCCI ON DIFFERENT COMMERCIAL BRACKETS
No full textObjective.
To compare early bacterial adhesion and biofilm formation in vitro by different oral streptococci on a variety of commercial brackets
Materials and Methods.
Adhesion and biofilm formation in vitro of 6 Streptococcus spp. on 15 different commercial brackets, in standard culture medium and in human saliva was evaluated by the MTT reduction assay.
Results.
Significant differences were evidenced in both early adhesion and biofilm formation among the studied brackets and between the two conditions of growth. Gold brackets resulted less prone to colonization, while composites brackets were the most prone ones. The rates of growth of the different tested species on the different tested materials were significantly different.
Conclusions.
The adopted experimental plan, dissecting the two phases of plaque formation on different brackets in different conditions, showed that composite brackets are more susceptible to adhesion and colonization by streptococci, while the remaining tested brackets do not show differences that could be clinically relevant. Data suggest that different personal behaviors affecting the oral environment could significantly affect colonization of brackets by cariogenic bacteria
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