Simulated clinical adjustment and intra-oral polishing of two translucent, monolithic zirconia dental ceramics: An in vitro investigation of surface roughness

2020 ◽  
Vol 101 ◽  
pp. 103447
Author(s):  
Ahmad A. Jum’ah ◽  
Paul A. Brunton ◽  
Kai Chun Li ◽  
J Neil Waddell
Keyword(s):  
Surface Roughness ◽  
Dental Ceramics ◽  
In Vitro Investigation ◽  
Monolithic Zirconia

scholarly journals Resin Nano-Ceramic Material Surface Roughness, Color Stability, and Bacterial Adhesion Evaluation After Different Scaling Methods

2021 ◽  
Vol 24 (4) ◽  
Author(s):  
Engy Adel Ahmed Farag ◽  
Tarek Salah Morsi ◽  
Marwa Mohamed Wahsh ◽  
Amr Saleh El-Etreby
Keyword(s):  
Surface Roughness ◽  
Ceramic Material ◽  
Color Stability ◽  
Bacterial Biofilm ◽  
Color Measurement ◽  
Material Surface ◽  
Dental Ceramics ◽  
Custom Made ◽  
Scaling Methods

Objectives: The study evaluated in vitro the changes in roughness, color stability, and bacterial count of a CAD/CAM Resin Nano-Ceramic material surface treated by various scaling procedures. Material and Methods: 70 disks (5mm diameter, 0.5 mm thickness) of Resin Nano-Ceramic (Lava ™Ultimate, 3M, ESPE) material were cemented in standardized cavities prepared in bovine teeth. A custom-made scaling apparatus of a double pan balance was used for different scaling methods, simulating standard clinical conditions. The specimens were assigned to three main groups: no scaling(C), ultrasonic scaling (U), and manual scaling (M). Each group was then divided into three subgroups according to scaling tip material; stainless steel tip (St), plastic tip (P), and titanium tip (Ti). The surface texture was analyzed quantitatively and qualitatively with a tactile profilometer and atomic force microscopy. A spectrophotometer was used for color measurement. Streptococcus mutans were counted in a colony counter. All the data were tabulated and statistically analyzed. Results: Two-way ANOVA was used to study the effect while One-way ANOVA was performed to compare between study groups. The significance level was set at p 0.05. The ultrasonic titanium tip(UTi) revealed the significant highest mean value of alterations (p < 0.001). The integrity of the material surface was altered in the form of deep scratches on the ultrasonically scaled surfaces and numerous smaller scratches on the hand-scaled surfaces. Conclusion: The plastic instrument would appear to be the instrument of choice during a routine maintenance procedure for Resin Nano-Ceramic materials. Keywords Bacterial biofilm; Dental ceramics; Color stability; Scaling; Surface roughness.

scholarly journals Variations in the Shades of Contemporary Dental Ceramics: An In Vitro Analysis

Crystals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1288
Author(s):  
Syed Rashid Habib ◽  
Abdulaziz Saud Al Rashoud ◽  
Turki Ali Safhi ◽  
Abdulrahman Hamad Almajed ◽  
Hamad Ali Alnafisah ◽  
...  
Keyword(s):  
Statistical Tests ◽  
Color Difference ◽  
Ceramic Materials ◽  
Dental Ceramics ◽  
Color Differences ◽  
Monolithic Zirconia ◽  
Vitro Analysis ◽  
Post Hoc ◽  
Shade Guide

Background: To identify and compare the shade variations of various commonly used esthetic dental ceramics by calculating their total-color-difference (ΔE) and translucency parameter (TP) using a spectrophotometer. Methods: In total, 165 disc specimens from three shades (A1, B1, and C1) of five ceramic materials (N = 55/shade; n = 11/ceramic material group) were prepared (Metal-ceramic (MC), IPS e.max press (Emax-P), IPS e.max layer (Emax-L), Layered Zirconia (Zr-L) and Monolithic zirconia (Zr-M)). With a spectrophotometer, the L*a*b* values were obtained. Total color differences (ΔE = [(ΔL*)2 + (Δa*)2 + (Δb*)2]1/2) and translucency parameter (TP = [(L*B − L*W)2 + (a*B − a*W)2 + (b*B – b*W)2]1/2) were calculated. The statistical tests included ANOVA and Post hoc Tukey’s analysis (p < 0.05). Results: Significant differences (p = 0.000) were found between the groups for ΔE. Highest ΔE (A1) were found for Zr-L (80.18 ± 20) and lowest for Zr-M (62.97 ± 1.28). For B1, highest ΔE values were noted for MC (76.85 + 0.78) and lowest for the Emax-L (62.13 ± 1.49). For C1, highest ΔE values were found for the MC group (73.96 ± 0 67) and lowest for Emax-P (55.09 ± 1.76). Translucency variations between tested ceramics were revealed (p < 0.05). Highest TP values (A1) were found for Emax-L (2.99 ± 1.64) and lowest for Zr-L (0.35 ± 0.16). For B1, highest TP values were noted for Emax-P (3.50 ± 1.74) and lowest for MC (0.57 ± 0.40). For C1, highest TP values were found for Emax-P (4.46 ± 2.42) and lowest for MC (0.58 ± 0 48). Conclusions: Significant differences in ΔE and TP were found for tested ceramic groups. The color differences of the tested materials varied according to clinical acceptability, even with the selection of same color/shade. The color/shades of the various dental ceramics do not match with the vita shade guide tabs, to which they are compared most often. Shade differences are present between different lots of ceramic materials from the same or different brands.

scholarly journals Surface roughness evaluation of in vitro refinished dental ceramics followed by bleaching treatment

2013 ◽  
Vol 16 (3) ◽  
Author(s):  
Sérgio Augusto Morey Ourique ◽  
Leonardo Colombo Zeidan ◽  
Alessandra Cassoni ◽  
Cesar Augusto Galvão Arrais ◽  
José Augusto Rodrigues
Keyword(s):  
Surface Roughness ◽  
Dental Ceramics ◽  
Roughness Evaluation ◽  
Bleaching Treatment

scholarly journals Optical and Surface Properties of Monolithic Zirconia after Simulated Toothbrushing

Materials ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1158 ◽  
Author(s):  
Jae-Hyun Lee ◽  
Sung-Hun Kim ◽  
Jung-Suk Han ◽  
In-Sung Luke Yeo ◽  
Hyung-In Yoon
Keyword(s):  
Surface Roughness ◽  
Repeated Measures ◽  
In Vitro Study ◽  
Surface Characteristics ◽  
Intergroup Comparison ◽  
Significant Difference ◽  
Monolithic Zirconia ◽  
The Impact ◽  
Surface Gloss

This in vitro study investigated the impact of various dentifrices on the shade, translucency, gloss, and surface characteristics of polishing- or glazing-finished monolithic zirconia surfaces after simulated toothbrushing. Eighty square-shaped monolithic zirconia specimens were divided into two major groups based on the finishing methods—polished (P) and glazed (G). Next, specimens from the two major groups were categorized into four subgroups: stored in distilled water (DW, control); brushed with a fluoride-free conventional dentifrice (C); brushed with a fluoride dentifrice (F); and brushed with a whitening dentifrice (W). Overall, eight groups were created—PDW, PC, PF, PW, GDW, GC, GF, and GW (n = 10 each). Shade, translucency, surface gloss, surface roughness, crystalline phase, and superficial topography data were obtained. Repeated-measures ANOVA and two-way ANOVA were used for intergroup comparison (all α = 0.05). The color differences (ΔE00) between pre- and posttreatment were 0.3158 (PDW), 0.7164 (PC), 0.7498 (PF), 0.8106 (PW), 0.1953 (GDW), 0.301 (GC), 0.3051 (GF), and 0.4846 (GW). A statistically significant difference was observed among the ΔE00, surface gloss, and surface roughness of monolithic zirconia. Thus, brushing with several dentifrices markedly affects the optical properties and surface characteristics of monolithic zirconia finished with polishing or glazing methods.

scholarly journals Changes in Crystal Phase, Morphology, and Flexural Strength of As-Sintered Translucent Monolithic Zirconia Ceramic Modified by Femtosecond Laser

2021 ◽  
Vol 11 (15) ◽  
pp. 6925
Author(s):  
Shanshan Liang ◽  
Hongqiang Ye ◽  
Fusong Yuan
Keyword(s):  
Surface Roughness ◽  
Flexural Strength ◽  
Femtosecond Laser ◽  
Laser Treatment ◽  
Acid Corrosion ◽  
Zirconia Ceramic ◽  
Control Group ◽  
Airborne Particle ◽  
Monolithic Zirconia

Conventional bonding technology suitable for silica-based ceramics is not applicable to zirconia, due to its polycrystalline phase composition, chemical stability, and acid corrosion resistance. The development of an effective treatment to improve its surface roughness and mechanical properties remains an unresolved problem. Therefore, to solve this problem, this in vitro study evaluated the changes in surface morphology and flexural strength of translucent monolithic zirconia surfaces treated with femtosecond laser technology. As-sintered translucent zirconia specimens were subjected to airborne particle abrasion and femtosecond laser treatments, while control group specimens received no treatment. After treatment, the roughness and morphology of the treated zirconia surfaces were examined. The flexural strength and X-ray diffraction of the treated specimens were measured and analyzed. Statistical inferential analysis included one-way analysis of variance at a set significance level of 5%. The surface roughness after femtosecond laser treatment was significantly improved when compared with the control group and the group that received the airborne particle abrasion treatment (p < 0.05). In comparison with the airborne particle abrasion group, the flexural strength of the group that received the femtosecond laser treatment was significantly improved (p < 0.05). The femtosecond laser approach using appropriate parameters enhanced the roughness of the zirconia without reducing its flexural strength; therefore, this approach offers potential for the treatment of zirconia surfaces.

scholarly journals Optical properties of translucent zirconia: A review of the literature

2019 ◽  
Vol 3 (1) ◽  
pp. 45-51 ◽  
Author(s):  
Manuela-Maria Manziuc ◽  
Cristina Gasparik ◽  
Marius Negucioiu ◽  
Mariana Constantiniuc ◽  
Alexandru Burde ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Systematic Review ◽  
Optical Properties ◽  
English Language ◽  
Meta Analysis ◽  
Tetragonal Zirconia ◽  
Dental Ceramics ◽  
Monolithic Zirconia ◽  
New Generation

Abstract Translucent monolithic zirconia is the newest option of zirconia-based ceramics, which aimed to substitute the opaque classic yttria-stabilized tetragonal zirconia polycrystal (Y-TZPs) in more demanding esthetic cases. The aim of this review was to assess the available literature regarding the optical, chemical and mechanical properties of translucent zirconia ceramics. This systematic review was developed according to the PRISMA (Preferred Reporting Items for Systematic Review and Meta-analysis) guidelines. An electronic literature search was undertaken through Medline (National Library of Medicine) via PubMed to identify relevant articles, published in the interval 2010-2018. The search was limited to the English language publications, in vitro studies of color and microstructure of translucent zirconia material. Yttria-stabilized tetragonal zirconia polycrystals (Y-TZPs) has excellent mechanical properties, but its intense white color and high opacity represent an esthetic limit. Cubic zirconia represents a new generation of dental ceramics with molecular structure and physical properties different from the conventional zirconia. Dental manufacturers created new formulations of this restorative material, introducing new cubic varieties of zirconia with improved optical properties. Translucent monolithic zirconia provides a new restorative option that combines strength with improved esthetics, due to its increased translucency. Translucent zirconia is indicated for anterior and posterior restorations but should be used carefully for discolored teeth, because the background color can affect the final esthetic appearance of the restoration.

scholarly journals In Vitro Effect of Acidic Solutions and Sodium Fluoride on Surface Roughness of Two Types of CAD-CAM Dental Ceramics

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Elham Farhadi ◽  
Hamid Kermanshah ◽  
Shiva Rafizadeh ◽  
Reza Saeedi ◽  
Ladan Ranjbar Omrani
Keyword(s):  
Surface Roughness ◽  
Acetic Acid ◽  
Gastric Acid ◽  
Sodium Fluoride ◽  
Artificial Saliva ◽  
Dental Ceramics ◽  
Acidic Solutions ◽  
Cad Cam ◽  
Vitro Effect

Objectives. This study assessed the effect of immersion in acidic solutions and sodium fluoride on surface roughness of dental ceramics. Materials and Methods. 40 blocks of Vitablocs Mark II and IPS e.max CAD (5 × 5 × 3) were prepared. The samples were divided into five groups (n = 8) for immersion in artificial saliva (control), artificially prepared gastric acid, acetic acid, 0.02% sodium fluoride + gastric acid, and 0.02% sodium fluoride + acetic acid. The samples were immersed for 168 hours in the respective solutions except for sodium fluoride, in which the samples were immersed for 69 hours. The surface roughness of samples was measured before and after immersion using a profilometer. The surface roughness changes of three specimens of each group were evaluated by scanning electron microscopy (SEM). Data were analyzed using one-way and two-way ANOVA, Tukey’s test, and independent t-test. Results. Significant changes were noted in Ra ( P = 0.002 ) and Rq ( P < 0.0001 ) in both types of ceramics. The lowest changes in Ra and Rq parameters were seen in artificial saliva and gastric acid and highest changes occurred following immersion in 0.02% sodium fluoride + acetic acid and 0.02% sodium fluoride + gastric acid, respectively. Changes in Rz were also significant following immersion in Vitablocs Mark II ( P < 0.05 ). Immersion in 0.02% sodium fluoride + gastric acid and 0.02% sodium fluoride + acetic acid produced a rougher surface on both types of ceramics (SEM). Conclusion. Exposure of Vitablocs Mark II CAD and IPS e.max CAD to 0.02% sodium fluoride + gastric acid and 0.02% sodium fluoride + acetic acid significantly increased their surface roughness, while for Vitablocs Mark II, lager defects were seen on its surface.

Sign in / Sign up

Export Citation Format

Share Document