الفهرس 
ACKNOWLEDGMENTOnly 14 pages are availabe for public view
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Abstract
To investigate penetration of two external bleaching agents into the pulp chamber of teeth restored with three
brands of composite resin . Forty eight maxillary central incisors were equally divided into two groups and treated
with In - Office Bleaching and Home Bleaching . Each group was equally subdivided into one control and three
experimental groups according to composits resin used to restore class V preparations , either Filtek Z 350 or
Filtek Supreme or Tetric EvoCeram