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. 2020 Sep;32(6):581-585.
doi: 10.1111/jerd.12590. Epub 2020 Apr 30.

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

Taiseer A Sulaiman  1 , Renata N Camino  1 , Ryan Cook  1 , Alex J Delgado  2 , Jean-Francois Roulet  2 , Wendy A Clark  1
Affiliations

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

Taiseer A Sulaiman et al. J Esthet Restor Dent. 2020 Sep.

Abstract

Objective: To evaluate and compare color stability and gloss retention of ceramic stains and glaze under simulated toothbrushing using dentifrices with different relative dentin abrasion (RDA).

Materials and methods: Feldspathic porcelain, lithium disilicate, 3 mol% yttria partially stabilized zirconia, and 5 mol% yttria partially stabilized zirconia were evaluated. Ceramics were externally stained, glazed and mounted in the toothbrush simulator. A toothbrush with 300 g force was applied. Regular toothpaste (72 RDA) and charcoal toothpaste (RDA <200) were used. Linear brushing motion with cycle intervals: 5 k, 10 k, 30 k, and 50 k was achieved. Change in color (CIEΔE2000) and gloss measurements were collected using a reflection spectrophotometer (Ci 7600, X-rite) at baseline and cycle intervals. Repeated measures analysis of variance within specimen factors (ceramic type, toothpaste and cycles) was performed.

Results: ΔE00 was significantly different at 50 k cycles and with zirconia ceramics (P < .0001). Charcoal toothpaste was significantly different in ΔE00 compared to regular toothpaste (P > .0001). Loss of gloss was observed at 5 k and 30 k (charcoal and regular toothpaste respectively) regardless type of ceramic (P > .0001).

Conclusion: Glass-phase ceramics retain stains longer than zirconia ceramics. Charcoal toothpaste affect color and gloss stability. Ceramic glaze maybe lost within the first 6 months in patients' mouth.

Clinical significance: Long-term color and gloss stability of externally stained and glazed ceramics maybe a clinical concern. Charcoal toothpastes enhance loss of color and gloss of ceramic restorations.

Keywords: ceramic stains and glaze; dental ceramics; toothbrush simulation.

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References

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