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Results for “Tooth Bleaching”

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At least 415 records · Page 23Linked to original sources
PubMed1996

Assessing tooth color change after repeated bleaching in vitro with a 10 percent carbamide peroxide gel.

The aim of this study was to obtain information about tooth color changes in 25 extracted human incisors resulting from repeated bleaching with a 10 percent carbamide peroxide gel. Using a colorimeter, the author recorded color changes in the L*a*b* color space after each bleaching period. The observed tooth color change was found to be dependent on the bleaching time, the specific bleached section and the initial color. The most significant total tooth color change was observed in the incisal section of the crown, followed by the middle and the cervical sections.

Analysis of Variance↗
PubMed1983

Cervical resorption in bleached teeth.

A case of cervical resorption in a bleached, pulpless tooth is reported. The tooth has not been traumatized, and no other reason for the resorption could be found except the possible effects of a caustic bleaching agent. This case further supports the evidence in the literature that a cause-and-effect relationship exists between Superoxol bleaching and cervical resorption.

Female↗
PubMed1971

Bleaching.

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Hydrogen Peroxide↗
PubMed1989

An in vitro comparison of different bleaching agents in the discolored tooth.

Extracted teeth with intact crowns were stained to compare and evaluate the effectiveness of four bleaching agent combinations. Forty-two permanent and 12 deciduous teeth were used. The bleaching agents were placed into coronal pulp chambers and then evaluated and rated at 1-, 3-, 7-, and 14-day and 6-month intervals. New sodium perborate combined with fresh Superoxol was the most effective bleaching agent with 93% success (the final shade was as light as the prestained shade). New sodium perborate and 1-yr-old Superoxol was 73% successful. New sodium perborate with distilled water and old sodium perborate with distilled water were both 53% successful. Deciduous teeth demonstrated a response to bleaching agents similar to that of permanent teeth. Color regression after 6 months was found in 4% of the cases. When it occurred, the degree of color regression was minimal.

Borates↗
PubMed2006

[Influence of whitening endoopalescence systems on the restoration of devitalized teeth].

At the end 80s of the XX century bleaching of teeth became one of the most important issues in the stomatological industry. Currently there are two methods of bleaching: external and internal (endo bleaching) methods. It is proved that the adhesive ability of the tooth tissues reduces as a result of peroxide penetration into enamel and dentine. Based on this, the aim of our study was to use the antioxidants for excluding the peroxides from tooth tissues and for rehabilitation of reduced adhesion. For this purpose we used central and side 36 healthy incisors, where after processing of tooth tissue with antioxidants and without them we studied the formation of micro rift between the operation material and dentine, and intensity of micro flowing by means of stereo microscope. We used 30% endo-opalescence as a bleacher and used 10% sodium acrobat as antioxidant. As a result of experiment we found out that the teeth where we used antioxidant were not penetrated with metaline blue; unlikely, the teeth where we did not use the same method we got the approximate result in the group of teeth, where for peroxide exclusion we performed the crown reconstruction not immediately, but after 7 days. During the whole experiment the teeth were kept in thermostat at 37 degrees C in saliva to create the natural conditions for them. In overall we can conclude that the deteriorated adhesive ability with peroxide influence can be improved by application of antioxidants.

Antioxidants↗