| dc.description.abstract | Introduction
Regenerative endodontic procedure (REP) are known as a new approach in the root
treatment of immature permanent teeth, which allow the growth and development of the
immature roots of necrotic permanent teeth. One of the main factors in the success of
these treatments is adequate cleaning and disinfection of the root canal of immature teeth.
For this purpose, the American Association of Endodontists (AAE) has introduced the
triple antibiotic paste (TAP), which includes the antibiotics minocycline, ciprofloxacin
and metronidazole.
Although its many advantages, this combination has disadvantages such as changing the
color of the teeth,. Therefore, it is useful to correct the color of the discolored teeth with
conservative methods, one of these methods is Bleaching treatment. The purpose of this
study is to compare different Bleaching methods to correct the color of discolored teeth.
Material & Methods
First, 60 newly extracted anterior teeth, which are single canal and single root, were
collected and after disinfection with 1.5% sodium hypochlorite for 3 minutes, in order to
simulate the immature apex, changes were made on the teeth and the length of all The
teeth were considered to be 15 mm on average. Wax was placed at the ends of the cut
roots. Then, after creating the access cavity in the teeth and completely cleaning the canals
and finally the access cavities were temporarily repaired. Then the samples were
randomly divided into two groups of 30 and inside the root canal of the teeth, up to the
level of the CEJ, two types of antibiotics generally used in endo revascularization
treatments, namely TAP 1 (ciprofloxacin, metronidazole, amoxicillin) and TAP 2
(ciprofloxacin, metronidazole, minocycline) were placed separately. Then the samples
were temporarily restored with temporary restorative materials and in the next step, the
changes in the color of the teeth in weeks 0 (immediately after contact with antibiotics),
3 and 6 separately They were analyzed and compared with a spectrophotometer.
After 6 weeks have passed since the last analysis of color changes caused by antibiotics,
in the next step, the teeth of each group were randomly divided into three subgroups, and
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the teeth of each subgroup were treated with different methods and protocols with three
commonly used substances in Teeth bleaching, sodium perborate, hydrogen peroxide,
carbamide peroxide were bleached. The color analysis of all samples was done separately
in weeks 0 (immediately after bleaching), 3 and 6 with the help of a spectrophotometric
device. To compare the effect of time and color changes in teeth after contact with
antibiotics and bleaching materials, from the test Two Factor repeated mesure (ANOVA)
and SPSS22 statistical software were used.
Results
The amount of teeth color changes in the first group (TAP1) was less than the second
group and also various bleaching methods were effective in correcting the color of
discolored teeth, but there was no significant difference between the types of methods.
Conclusions
Triple Antibiotic Paste (TAP) changes the color of teeth, and TAP with minocycline
caused more color changes in teeth than TAP with amoxicillin, and also bleaching can
partially correct the color of discolored teeth. | en_US |
