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Time-lasting ceramic stains and glaze: A toothbrush simulation study.

Taiseer A Sulaiman1, Renata N Camino1, Ryan Cook1

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Summary
This summary is machine-generated.

Ceramic stains and glazes on dental restorations showed reduced color and gloss stability with simulated toothbrushing, especially with charcoal toothpaste. Glass-phase ceramics performed better than zirconia, indicating potential clinical concerns for long-term restorations.

Keywords:
ceramic stains and glazedental ceramicstoothbrush simulation

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Area of Science:

  • Dental Materials Science
  • Biomaterials Engineering
  • Restorative Dentistry

Background:

  • Dental ceramic restorations are esthetically important.
  • Surface treatments like staining and glazing aim to improve aesthetics but may be susceptible to wear.
  • Toothpaste abrasivity is a factor influencing the longevity of dental materials.

Purpose of the Study:

  • To compare the color stability and gloss retention of different dental ceramics with external stains and glazes.
  • To evaluate the impact of simulated toothbrushing with varying Relative Dentin Abrasion (RDA) toothpastes on ceramic surface integrity.
  • To assess the influence of ceramic type and toothpaste abrasivity on color change and gloss loss.

Main Methods:

  • Four ceramic types (feldspathic porcelain, lithium disilicate, 3 mol% Y-TZP, 5 mol% Y-TZP) were externally stained and glazed.
  • Specimens underwent simulated toothbrushing (300g force) using regular (RDA 72) and charcoal (RDA <200) toothpastes at 5k, 10k, 30k, and 50k cycles.
  • Color change (CIEΔE2000) and gloss were measured using a reflection spectrophotometer.
  • Statistical analysis included repeated measures ANOVA.

Main Results:

  • Zirconia ceramics exhibited significant color change (ΔE00) at 50k cycles compared to glass-phase ceramics.
  • Charcoal toothpaste resulted in significantly greater color change than regular toothpaste.
  • Gloss loss was observed early (5k-30k cycles) irrespective of ceramic type, influenced by toothpaste.

Conclusions:

  • Glass-phase ceramics demonstrate superior stain retention compared to zirconia ceramics.
  • Charcoal-based toothpastes negatively impact the color and gloss stability of stained and glazed ceramic restorations.
  • The long-term color and gloss stability of externally stained and glazed ceramics may be a clinical concern, with potential glaze loss within months.