Abstract
To estimate the effectiveness of sodium perborate with carbamide-peroxide (urea peroxide) to remove the staining of non-vital discolored teeth. Comparative cross sectional study. Dental department of operative dentistry, LUMHS, Jamshoro Sindh, Pakistan, from December 15-12-2014 to June 15-6-2015. A total of 160 single rooted teeth with intact clinical crowns have been collected. Using human blood, the teeth were discolored. With the vita shade guide, shades of discolored teeth were taken. Each tooth was handled with the root canal. 2 mm of root-canal-filling material cleaned under the junction of cement-enamel. In addition, it was then coated with glass ionomer cement 1 mm thickness. Teeth were divided randomly into two groups based on bleaching content used in the pulp chamber; group-A (C.P): 16% Carbamide-peroxide. Group-B (S.P): tetra-hydrate sodium-perborate mixed with distilled water. After 21days, the results were checked for efficacy. The analysis included a total of 160 teeth extracted (80 teeth extracted in each group). In group A, 78 (51.7%) found effectiveness compared to 73 (48.3%) in group B. The experimental groups showed statistically similar bleaching results at the end of twenty one days and p value found to be not significantly different (p=0.078). With a significant result, intracoronal bleaching of non-vital colored teeth is less invasive, comparatively safe and effective to remove the staining of non-vital discolored teeth.
Highlights
Discolored anterior teeth are often supposed to distract esthetically, because of increasing need for beautiful, white teeth and concern of esthetic treatment methods; Bleaching of non-vital teeth has become slowly important in recent years
Carbamide peroxide and sodium perborate 50% and 50% were the types of bleaching agents respectively. (Table NO: 2)
At the end of twenty-one days, eighty percent of discolored teeth resumed their original color in group 1 Carbamide peroxide (CP), and at the end of twenty-one days, 93.33 % of discolored teeth resumed their original color in group 2 tetrahydrate sodium perborate (SP)
Summary
Discolored anterior teeth are often supposed to distract esthetically, because of increasing need for beautiful, white teeth and concern of esthetic treatment methods; Bleaching of non-vital teeth has become slowly important in recent years. The most commonly used materials for teeth whitening are sodium perborate (PBS), hydrogen-peroxide (H2O2) and intracoronal bleaching carbamide-peroxide.[1,2,3]. Hydrogen peroxide as a bleaching agent appears to be of great usefulness to remove stains in vital as well as in non-vital teeth. In recent times it has been endorsed as an intra-coronal bleaching.[4] Sodium-perborate, commonly used in bleaching of nonvital teeth, subsequent to mixing with water it decomposed into hydrogen peroxide that’s released oxygen.[5,6] Currently, Sodium-perborate and Carbamide-peroxide are used owing to insignificant tissues harm by these materials. Carbamide-peroxide has been recently acknowledged for use in the removal of non-vital teeth discoloration and use as an intracoronal bleaching.[7]
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