Impact of Gastric Acid Induced Surface Changes on Mechanical Behavior and Optical Characteristics of Dental Ceramics

Kulkarni, Anagha; Rothrock, James K.; Thompson, Jeanette T.

doi:10.1111/jopr.12716

Cited by 49 publications

(65 citation statements)

References 28 publications

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“…Low pH in a solution containing the dental restorative material has been reported to affect its optical and surface properties (13)(14)(15). In the present study, the conventional mouthwash had a relatively low pH (3.93 AE 0.02).…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, the optical and surface properties of these materials can change within the oral cavity. Several studies have reported that acidic solutions, including cola, orange juice, red wine, coffee, and gastric acid, can change the optical properties and surface roughness of toothcoloured dental restorative materials (10)(11)(12)(13)(14)(15). In addition, several oral hygiene solutions currently on the market can also affect the colour of dental restoration materials (16)(17)(18).…”

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confidence: 99%

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Colour stability and surface properties of high‐translucency restorative materials for digital dentistry after simulated oral rinsing

Lee

Kim

Yoon

et al. 2020

European J Oral Sciences

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High‐translucency restorative materials are commonly used in the restoration of anterior teeth where aesthetics is a critical factor. In this in vitro study, the impact of mouthwash on the colour stability and surface characteristics of high‐translucency computer‐aided design and computer‐aided manufacturing (CAD‐CAM) dental restorative materials was evaluated. Two‐hundred specimens were fabricated from five high‐translucency CAD‐CAM materials: a resin nano ceramic; a polymer‐infiltrated ceramic network; a feldspathic ceramic; a lithium disilicate glass ceramic; and high‐translucency zirconia. Each group of ceramic specimens was then divided into four subgroups: conventional mouthwash (LISTERINE); whitening mouthwash (LISTERINE Healthy White); chlorhexidine gluconate; and distilled water. Oral rinsing was simulated at 100 rpm for 180 h, representing 15 yr of clinical simulation. The specimens were then evaluated for colour, translucency, gloss, roughness, and surface morphology. Two‐way ANOVA and linear mixed models were used for intergroup comparisons (α = 0.05). The polymer‐infiltrated ceramic network and feldspathic ceramic became brighter, more opaque, less glossy, and rougher after rinsing with the whitening mouthwash. The long‐term use of specific mouthwashes can cause deterioration of the optical and surface properties of high‐translucency CAD‐CAM dental restorations.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Colour stability and surface properties of high‐translucency restorative materials for digital dentistry after simulated oral rinsing

Lee

Kim

Yoon

et al. 2020

European J Oral Sciences

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“…29 Regarding the surface roughness it was observed that increased surface roughness influences the gloss of the restoration because affect light reflection and color perception due changes in surface topography of the ceramic. 30 Surface roughness increases are directly related to the decrease of the gloss of a specimen, because asperities on its surface will scatter light instead of reflecting it. 9,16,31,32 The gloss of a ceramic may interfere with its ability to reflect light, compromising the optical properties of the restoration and negatively influencing the esthetics.…”

Section: Discussionmentioning

confidence: 99%

Effect of carbamide peroxide bleaching agent on the surface roughness and gloss of a pressable ceramic

Rea

Roque

Macedo

et al. 2019

J Esthet Restor Dent

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Objective This study evaluated the influence of carbamide peroxide, 10% and 16%, on the surface roughness and gloss of a pressable ceramic. Materials and Methods Carbamide peroxide (10% or 16%) was applied for 4 hours or 3 hours per day for 14 days, respectively, in pressable ceramic discs (14 mm × 2 mm). Specimens were stored in distilled water at 37°C. Surface roughness and gloss were determined before carbamide peroxide application (T0), 7 days (T7) and 14 days (T14) after the initial treatment. ANOVA was used with repeated measures and multiple comparisons with a Bonferroni adjustment (P < 0.005). Results Significant increase in surface roughness was observed over time (P < 0.001), with T0 < T7 < T14. When the gloss was analyzed, significant differences were found (P < 0.001), control group showed a higher gloss than those of the 10% and 16% groups. Significant decrease in gloss was observed over time (P < 0.001), with T0 > T7 > T14. Conclusions The surface roughness of pressable ceramics increased, while their gloss significantly decreased when 10% or 16% carbamide peroxide was applied. The specimens treated with 16% carbamide peroxide exhibited higher surface roughness and less gloss than the specimens treated with 10% carbamide peroxide. Clinical significance This study found that carbamide peroxide gels commonly used in at‐home procedures influenced the surface roughness and gloss of a pressable ceramic that is often used for rehabilitation esthetics.

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“…According to previous reports, a low pH environment (acidic medium) can affect some properties of the porcelain ceramics, such as: surface roughness, color stability, and gloss . Therefore, the acid presence in saliva enables the ceramic surface degradation while the exposure to a basic pH buffer results in segregation of the silica network, resulting in selective ionic leaching of the glass matrix .…”

Section: Introductionmentioning

confidence: 99%

Effect of pH variation on the subcritical crack growth parameters of glassy matrix ceramics

Melo

Pereira

Ramos

et al. 2019

Int J Applied Ceramic Tech

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The goals of our study were to calculate the subcritical crack growth (SCG) parameters of two veneering ceramics stored in water or Streptococcus mutans (S. mutans) biofilm and remineralizing medium, with indentation flaws. Feldspar (VM7) and leucite-reinforced (VM13) glass ceramic disks (Vita Zahnfabrik, Bad Säckingen, Germany) were made according to ISO 6872. Some specimens were indented with a Vickers diamond and the crack dimensions were measured. The specimens were fractured for a calculation of inert strength or further stored in water or submitted to pH variation, under preloading tension. Finally, the SCG parameters were calculated after the specimens were fractured under four stressing rates (MPa/s). Weibull analysis was conducted on non-indented specimens. XPS was performed as qualitative analysis. The subcritical crack of leucite ceramic did not vary with the media storage, but the glass-ceramic experienced a retarded growth after pH variation. The materials presented low Weibull modulus. Qualitative elemental analyses showed chemical modification on both ceramics. Therefore, the crack growth of leucite-reinforced ceramic was less affected by the environment pH than glass-ceramic. K E Y W O R D S aging, crack velocity, fatigue, glass-ceramics, subcritical crack growth How to cite this article: Melo RM, Pereira C, Ramos NC, et al. Effect of pH variation on the subcritical crack growth parameters of glassy matrix ceramics. Int J Appl Ceram Technol. 2019;16:2449-2456. https ://doi.

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Impact of Gastric Acid Induced Surface Changes on Mechanical Behavior and Optical Characteristics of Dental Ceramics

Abstract: The acid treatment affected the surface roughness, color, and gloss of porcelain and e.max ceramics. The changes in translucency and mechanical strength for all materials were not statistically significant. Zirconia ceramic showed resistance to all treatments.

Cited by 49 publications

References 28 publications

Colour stability and surface properties of high‐translucency restorative materials for digital dentistry after simulated oral rinsing

Colour stability and surface properties of high‐translucency restorative materials for digital dentistry after simulated oral rinsing

Effect of carbamide peroxide bleaching agent on the surface roughness and gloss of a pressable ceramic

Effect of pH variation on the subcritical crack growth parameters of glassy matrix ceramics

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