| Summary: | Bleaching is a whitening process following tooth discoloration. One of the
side effect of tooth bleaching is tooth sensitivity. To overcome tooth sensitivity,
desensitizing agent with or without fluor usually administered after tooth
bleaching was performed. The method used nowadays can not overcome
demineralization that happened as a side effect of bleaching agent. The aim of this
study was to know the influence of an application method and fluoride containing
desensitizing agent on surface characteristics and mineral loss of in office
bleaching treated enamel.
Fourteen teeth were divided into 4 parts. Before treatment the mineral content
of the 6 specimens were examined using using X-Ray Diffraction (XRD), while
the other 24 specimens were examined after treatment, 24 specimens for
roughness, contact angle, glucosyltransferase activity and the adhesion of
S.mutans. The 24 specimens were then divided into 4 groups, group I and III were
treated with desensitizing agent (DA) after in office bleaching, while group II and
IV were treated with DA before and after bleaching. The desensitizing agent used
in group III and IV was the one that contains fluor, while others not. Twenty four
of the speciemens were examined for mineral loss, surface roughness, contact
angle before and after bleaching, followed by measuring glucosyltransferase
activity, the adhesions of S. mutans and Scanning Electron Microscope (SEM).
Using Mann Whitney Test, the result of this research showed that the lowest
mineral loss value can be seen in group D (4.500) . The Surface roughness
examination showed the smoothest group was seen in group D (1.188±0,196).
The biggest difference of contact angle value was detected in group IV (31.71 ±
3,71).. The mean value at the accumulation of S. mutans colony was the lowest
for group IV (37 ± 2,098), while the mean value at the glucosyltransferase activity
can be seen in group IV (1,67±0,658).
In conclusion, group IV in which the application of fluoride containing
desensitizing agent was administered before and after bleaching showed the best
result. Group IV was the most effective in reducing mineral loss, the smoothest,
the most hydrophyl. Group IV showed reducing the accumulation of S. mutans
colony and glucosyltransferase activity.
Keywords : Desensitizing agent, in office bleaching, surface characteristics,
mineral loss, S. mutans adhesi
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