title: Efficacy of casein phosphopeptide-amorphous calcium phosphate to prevent stain absorption on freshly bleached enamel: An in vitro study.
abstract: BACKGROUND
  Teeth when subjected to bleaching bring about the desiccation of the enamel, making it more susceptible to stain absorption. While subjecting the freshly bleached enamel surface to various surface treatments of Fluoride and Casein Phosphopeptide - Amorphous Calcium phosphate (CPP-ACP) brought about the reduction in stain absorption, which is assessed in this study.
  
  
  OBJECTIVE
  The study aims to evaluate the tea stain absorption on freshly bleached enamel surface of extracted human teeth with varied surface treatment. The stain absorption was evaluated at the end of one hour and 24 hours post bleaching.
  
  
  METHODS
  Forty extracted human permanent maxillary central incisors were subjected to bleaching with 10% carbamide peroxide for eight days. They were divided into four groups of 10 each. Group I was control group. Group II was immersed in tea solution without surface treatment, while Group III and IV were immersed in tea solution with surface treatment of topical Fluoride and CPP-ACP respectively. Spectrophotometer was used for color analysis.
  
  
  RESULTS
  Surface treatment with CPP-ACP and topical fluoride on freshly beached enamel surface, significantly reduced the stain absorption.
  
  
  CONCLUSIONS
  Remineralizing agents reduce stain absorption after tooth bleaching.
authors.affiliation: Department of Prosthodontics, Faculty of Dental Sciences, C.S.M. Medical University, Lucknow, Uttar Pradesh, India.
authors.forename: Raghuwar D
authors.initials: RD
authors.lastname: Singh
authors.forename: Sabita M
authors.initials: SM
authors.lastname: Ram
authors.forename: Omkar
authors.initials: O
authors.lastname: Shetty
authors.forename: Pooran
authors.initials: P
authors.lastname: Chand
authors.forename: Rakesh
authors.initials: R
authors.lastname: Yadav