Introduction: Tooth bleaching is an aesthetic procedure that has the skill to morphologically modify the mineralized structures of the tooth, in particular the reduction of surface microhardness, which can affect the enamel structure by increasing its surface roughness and color modification. It works by breaking up pigmented compounds in dentin, transforming them into smaller molecules. With the rising popularity of bleaching and patients' growing concern about their appearance, it's more important than ever to understand how bleaching agents react when they come into contact with restorative materials, such as composite resins, and the types of optical and structural changes that can result the outcome of this operation. Objective: The main objective of this study is to evaluate the effect of different bleaching agents (carbamide peroxide and hydrogen peroxide) on composite resin restorations. Methodology: A PubMed/Medline®, Cochrane®, and Lilacs® electronic search was performed using a specific search mechanism combining keywords with the Boolean connector AND. After reading its every material, relevant studies were chosen and rated. Two reviewers (GRL and RR) independently conducted the search and selection of studies to be included. Results: A total of 141 articles were found using the search algorithm. Duplicate articles were deleted, and 61 articles were chosen to be read in full in order to determine eligibility based on titles and abstracts. 45 items were eliminated due they did not fulfill the criteria. The qualitative analysis of this systematic review includes sixteen papers. Conclusions: With this study it’s possible to conclude that in the literature, the results do not gather consensus regarding the possible changes in the composition of the composite resin when in contact with bleaching agents. Meantime, it was found that, depending on the circumstances, the use of polishing may be sufficient. However, most studies point to the need for its replacement.
|Date of Award||19 Jul 2022|
- Universidade Católica Portuguesa
|Supervisor||Rute Rio (Supervisor) & Anna Moura (Co-Supervisor)|
- Tooth bleaching agents
- Composite resins
- Mestrado em Medicina Dentária