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Influence of Time Intervals between Bleaching Procedures on Enamel Microhardness and Surface Roughness
Roberta Pimentel de Oliveira1, Juliana Costa Pereira Baia1, Mara Eliane Soares Ribeiro1
1Faculty of Dentistry, Federal University of Para, Augusto Corrêa Street, number 1. Guamá, Belém, Para, Brazil.
The Open Dentistry Journal
|September 11, 2018
Summary
Shorter intervals between dental bleaching applications significantly reduce enamel microhardness. However, surface roughness increased irrespective of the bleaching interval, indicating potential aesthetic concerns.
Area of Science:
- Dental materials science
- Biomaterials research
- Conservative dentistry
Background:
- Dental bleaching is popular for aesthetics.
- Bleaching agents can alter dental enamel properties.
- Understanding these changes is crucial for safe clinical practice.
Purpose of the Study:
- To evaluate how different time intervals between bleaching gel applications affect enamel microhardness and surface roughness.
- To compare the impact of a two-day versus a seven-day interval on bovine incisor enamel.
Main Methods:
- Forty bovine incisors were divided into two groups.
- One group received bleaching with 35% Hydrogen Peroxide at two-day intervals, the other at seven-day intervals.
- Microhardness and surface roughness were measured before and after each application.
Main Results:
- A two-day interval significantly reduced enamel microhardness.
- Enamel microhardness remained unaffected with a seven-day interval.
- Surface roughness increased in both groups, regardless of the interval.
Conclusions:
- Decreasing the interval between bleaching applications to two days negatively impacts enamel microhardness.
- The interval between bleaching applications did not significantly influence enamel surface roughness.
- Clinical recommendations for bleaching intervals should consider potential microhardness reduction.
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