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Effectiveness of bleaching agent on composite resin d iscoloration

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Background: The discoloration of teeth, especially anterior teeth, is one of aesthetic problems. The use of tooth bleaching agents for discolored natural teeth is becoming increasingly popu/ar. Many dentists, however, get many prob/ems when they conduct bleaching process since there is much composite filling on patient's anterior teeth. Although many research have focused on the discoloration of composite resin after bleaching process, the problem still becomes debatable. Purpose: The purpose of this study was to investigate the difference of the discoloration between hybrid composite and nano composite before and after the application of tooth bleaching agent, 38% hydrogen peroxide.
Methods: Eighteen disk-shaped specimens (5 mm) of each of two composite resins, hybrid and nano filler, were prepared. The each group was treated 3 times and the specimens were divided info two groups consisted of 9 specimens for each, and then immersed in black tea solutions for 72 hours. Next, after having stain ing and bleaching processes, the color of the specimens was measured with a optic spectrophotometer by using photo with type BPY-47 and digital microvolt. The differences of the light intensity among three measurements were then calculated. Afterwards. GLM MANOVA Repeated Measure and parametric analysis (Independent i-test and Paired t-test) were then used to analyre the data. Results: After stain ing process, it is then known that the nano composite had more discoloration and more affected by the black tea solution than the hybrid one.
Coaclusion: After bleaching, the discoloration was finally removed completely from both hybride and nano filler composite resins and became brighter from the baseline color.
Key words: Discoloration, composite resins, bleaching agent

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Series Title

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Call Number

Dental Journal, 45 (1) 2012 : 43-47

Publisher

Surabaya : FKG Universitas Airlangga Surabaya., 2012

Collation

5p

Language

ISBN/ISSN

1978-3728

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Edition

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Subject(s)

DENTAL HEALTH SERVICES

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