1,721,004 research outputs found
FTIR, Raman and SEM analysis of enamel and dentin after the application of stannous fluoride.
No full textDentin Permeability in vitro after application of tartaric acid solutions
No full textPreliminary investigations demonstrated that salts tartrate solutions are able to create a layer of non-homogeneous crystals able to close dentainal tubules and reduce fluid flow rate calculated using a pressur apparatus.
The aim of this study was to evaluate the ability of a new solution constitued by tartaric acid (TA) solutions 0.1M (Ph 3.5)
to reduce in vitro the rate of fluid flow, also defined as dentin permeability (Lp). Dentin disc from human molars (N=48) were prepared and treated with 1m edta for 2 mins to remove the smearl layer and to calculate the maximum rate for each disc. The discs were connected with an hydraulic pressure apparatus working at 0.5 psi(Pashley, 1984). Fluid flow of 100% was assigned (Group A). A new smearl layer was re-created only in 24 samples (Group B). Solutions were applied for 2 mins and gently washed with water for 30 seconds, and fluid flow rate re-measured. EDTA was then re-applied for 2 mins, washed and fluid flow re-calculated. SEM analysis was performed for several samples. Results and Conclusions: The application of tartrate solution reduced the fluid flow rate (p<0.0001), and modified smearl layer morphology.
These treatments my contribute the dentin protection from diet acid attacks and may reduce dentin hypersensitivity
Hydraulic Conductance in Vitro of Human Dentin after application of Tartrate Solutions.
No full textHydraulic Conductance in Vitro of Human Dentin after application of Tartrate Solutions.
The aim of this study was to evaluate the ability of two solutions 0.1M NaKC4H406 and (CH3COO)2Ca to reduce in vitro the rate of fluid flow, also defined as dentin permeability (Lp). Dentin disc from human molars (N=48) were prepared and treated with 35% phosphoric acid for 2 mins to remove the smearl layer. The discs were connected with an hydraulic pressure apparatus working at 0.5 psi(Pashley, 1984). Fluid flow of 100% was assigned (Group A). A new smearl layer was re-created only in 24 samples (Group B).
Solutions were applied for 2 mins and gently washed with water for 30 seconds, and fluid flow rate re-measured. Phosphoric acid was then re-applied for 2 mins, washed and fluid flow re-calculated.SEM analysis was performed for several samples.
Results and Conclusions: The application of tartrate solution did not reduced the fluid flow rate, but prevented the removal of smearl layer by the second acid attack. These treatments my contribute the dentin protection from diet acid attacks
In situ enamel morphology evaluation after acidic soft drink consumption: protection factor of contemporary toothpaste.
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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
Dentine hypersensitivity treatment with phytocomplex oxalates pastes: a SEM and dentine permeability measurement study.
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