Impact of remineralizing agents on enamel microhardness recovery after in-office tooth bleaching therapies.
Summary of "Impact of remineralizing agents on enamel microhardness recovery after in-office tooth bleaching therapies."
Abstract Objective. It has been shown that bleaching with 35/38% hydrogen peroxides may alter both enamel morphology and mineral content. This study aimed to analyze the morphology and microhardness of enamel bleached with in-office hydrogen peroxides and exposed toremineralizing agents. Materials and methods. After recording initial enamel morphology and microhardness, 60 bovine incisors were bleached using either a calcium-containing 35% hydrogen peroxide (Whiteness HP Blue) or a calcium-free 35% hydrogen peroxide (Whitegold Office) (n = 30). Then, the teeth were subjected to one of three post-bleaching remineralizing treatments (n = 10): storage in artificial saliva only, application of a sodium fluoride gel or application of a nanohydroxyapatite-based agent (Nano-P). After 24 h and 14 days of post-bleaching treatments, the enamel morphology and microhardness were re-evaluated. The microhardness data were analyzed by means of two-way ANOVA with repeated measurements and Tukey tests (p < 0.05), while the enamel morphology was analyzed descriptively. Results. Samples exposed to Nano-P presented statistically the highest microhardness 24 h after its application in comparison with other remineralizing agents. The microhardness recovery did not occur in any of the groups 14 days after treatment. The morphology of all samples 14 days after the application of all remineralizing agents presented a higher number of irregularities. Conclusion. Although some remineralizing products provided microhardness recovery and a positive effect on enamel morphology at 24 h post-bleaching, none of them were able to maintain microhardness and enamel morphology at 14 days post-bleaching.
Affiliation
Department of Restorative Dentistry, Pernambuco School of Dentistry, University of Pernambuco , Camaragibe, Pernambuco , Brazil.
Journal Details
This article was published in the following journal.
Name: Acta odontologica Scandinavica
ISSN: 1502-3850
Pages:
Links
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/22564069
- DOI: http://dx.doi.org/10.3109/00016357.2012.681119
Medical and Biotech [MESH] Definitions
Enamel Organ
Epithelial cells surrounding the dental papilla and differentiated into three layers: the inner enamel epithelium, consisting of ameloblasts which eventually form the enamel, and the enamel pulp and external enamel epithelium, both of which atrophy and disappear before and upon eruption of the tooth, respectively.
United States Office Of Technology Assessment
An office established to help Congress participate and plan for the consequences of uses of technology. It provided information on both the beneficial and adverse effects of technological applications. The Office of Technology Assessment closed on September 29, 1995.
Dental Enamel Hypoplasia
An acquired or hereditary condition due to deficiency in the formation of tooth enamel (AMELOGENESIS). It is usually characterized by defective, thin, or malformed DENTAL ENAMEL. Risk factors for enamel hypoplasia include gene mutations, nutritional deficiencies, diseases, and environmental factors.
Amelogenesis
The elaboration of dental enamel by ameloblasts, beginning with its participation in the formation of the dentino-enamel junction to the production of the matrix for the enamel prisms and interprismatic substance. (Jablonski, Dictionary of Dentistry, 1992)
United States Office Of Research Integrity
An office of the UNITED STATES PUBLIC HEALTH SERVICE organized in June 1992 to promote research integrity and investigate misconduct in research supported by the Public Health Service. It consolidates the Office of Scientific Integrity of the National Institutes of Health and the Office of Scientific Integrity Review in the Office of the Assistant Secretary for Health.
PubMed Articles
SUMMARY This study evaluated the microhardness and histomorphology of bovine enamel when 35% hydrogen peroxide is used. A total of 44 specimens were adapted to removable devices used by 11 individuals...
This study evaluated the effect of microabrasion and polishing on the microhardness and roughness of bovine enamel, and the effect of artificial saliva on the hardness of enamel. Bovine enamel blocks...
Impact of Acquired Enamel Pellicle Modification on Initial Dental Erosion.
The acquired enamel pellicle that forms on the tooth surface serves as a natural protective barrier against dental erosion. Numerous proteins composing the pellicle serve different functions within th...
Degradability of fluorapatite-leucite ceramics in naturally acidic agents.
This study was conducted to evaluate the titratable acidity and effect of naturally acidic agents on the surface microhardness, elemental composition, and surface morphology of fluorapatite-leucite ce...
In situ remineralization of white-spot enamel lesions by 500 and 1,100 ppm F dentifrices.
The aim of this study was to evaluate the remineralization potential of three silica-containing NaF dentifrice systems in an intraoral model. Subjects (N = 30) in this randomized, three-phase, 28-...
Clinical Trials
Evaluation of a Low-fluoride Anticaries Toothpaste
The purpose of this trial is to evaluate the anticaries remineralizing potential of a toothpaste containing 500 ppm fluoride plus fTCP technology relative to a commercially available tooth...
In Vivo Wear of All-ceramic and Metal-ceramic Crowns and Their Enamel Antagonists After Three Years
This study aims determine the wear rates of enamel versus enamel and enamel versus ceramic in human beings in relation to the microstructure of the ceramic material. Specific aims of the...
Analysis of Enamel Wear Against Ceramic Restorations
1. To characterize the microstructure (fracture toughness, particle size of ceramic, and inter-particle spacing) of three ceramic materials 2. To test the hypothesis that lower fra...
Study of Factors of Genetic Susceptibility Associated to Severe Caries Phenotype
Alteration of the post- eruptive enamel microstructure due to a mutation of a gene coding for a matrix protein could increase the susceptibility of the enamel to caries after tooth eruptio...
Preoperative Nutritional Support in Esophagectomy or Pancreaticoduodenectomy
We are proposing to evaluate the benefit of preoperative nutritional support with Impact Advanced Recovery in the most vulnerable group of elective gastrointestinal surgery patients who ma...
