Protective effects of SnF2 - Part III. Mechanism of barrier layer attachment

Objective To assess the ability of various fluoride salts to protect enamel against acid attack via a barrier mechanism. Methods Extracted human enamel specimens were cleaned and rinsed, then soaked in pooled human saliva for 1 hour to initiate formation of an early pellicle. Groups of three specime...

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Bibliographic Details
Published in:International dental journal 2014-03, Vol.64 (s1), p.16-21
Main Authors: Faller, Robert V., Eversole, Sandra L.
Format: Article
Language:English
Subjects:
Anthraquinones
Citric Acid - adverse effects
Coloring Agents
Dental Enamel - drug effects
Dental Pellicle - drug effects
Dentifrices - therapeutic use
Dentistry
Diamines - therapeutic use
Enamel
Erosion
fluoride
Fluorides
Fluorides - therapeutic use
Humans
Hydrogen-Ion Concentration
Original
Phosphates - therapeutic use
Protective Agents - therapeutic use
Saliva - physiology
Silicic Acid - therapeutic use
Sodium Fluoride - therapeutic use
stannous fluoride
Tin Fluorides - therapeutic use
Tooth Erosion - prevention & control
toothpaste
Toothpastes - therapeutic use
toothwear
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Summary:Objective To assess the ability of various fluoride salts to protect enamel against acid attack via a barrier mechanism. Methods Extracted human enamel specimens were cleaned and rinsed, then soaked in pooled human saliva for 1 hour to initiate formation of an early pellicle. Groups of three specimens each were etched for 10 minutes in 1% citric acid (pH 2.3), treated in a 1:3 slurry of dentifrice [1,100 ppm F as stannous fluoride (SnF2), 1,100 ppm F as sodium fluoride (NaF), 1,000 ppm F as sodium monofluorophosphate (SMFP), or 1,400 ppm F as amine fluoride (AmF)] and saliva for 2 minutes, exposed to 2% alizarin red‐S (a calcium‐selective dye) and rinsed again. The relative ability of each test product to deposit a barrier layer on the enamel surface was measured by its ability to protect against attachment of the calcium‐selective dye. Results Specimens treated with the SnF2 dentifrice showed the least dye attachment, indicating a high level of surface protection. On a five‐point scale, with 0 being no dye deposition (100% protection) and four being complete dye coverage (0% protection), the SnF2‐treated specimens scored an average of 0.25, with NaF scoring 3.4, SMFP scoring 3.4 and AmF scoring 3.7. Protection of the enamel surface was significantly higher for the SnF2 product than for the other products (P 
ISSN:0020-6539
1875-595X
DOI:10.1111/idj.12098