The effect of accelerated aging on crystalline structures and optical properties of different monolithic zirconia: A qualitative systematic review

Hajhamid, Beshr; Alfrisany, Najm M.; Somogyi-Ganss, Eszter

doi:10.1016/j.dental.2022.02.005

Cited by 15 publications

(11 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results of this study show an increase in monoclinic content for HT zirconia after both aging protocols (5% after CRA and 40% after HA). HT zirconia contained 100% tetragonal crystals before aging, in agreement with previously reported results 44 . The lower incidence of t–m transformation reported in the CRA group might be related to the lower temperatures applied during the aging compared to HA.…”

Section: Discussionsupporting

confidence: 91%

“…Another study showed no significant effect of 1.2 million chewing cycles and 50,000 thermocycles on TP and CR for zirconia‐based materials with different levels of translucency 43 . In general, the data reported in the literature is inconclusive regarding the effects of HA on the optical properties of zirconia 44 . Supporting the present findings, a previous study reported no changes in TP values after 10 h of autoclave aging for HT zirconia 16 .…”

Section: Discussionsupporting

confidence: 76%

See 1 more Smart Citation

Effect of artificial aging on optical properties and crystalline structure of high‐translucency zirconia

Hajhamid

Bozec

Tenenbaum

et al. 2023

Journal of Prosthodontics

Self Cite

View full text Add to dashboard Cite

PurposeTo investigate the effect of different in vitro aging protocols on the optical properties and crystalline structure of high‐translucency (HT) zirconia.Materials and methodsThirty‐six specimens of HT and extra‐high translucency (XT) zirconia were divided into three groups: control (CO)—no treatment; hydrothermal aging (HA)—autoclave aging for 12.5 h at 134°C, 2 bar; clinically related aging (CRA)—aging in the chewing simulator for 1.2 million cycles, followed by 50,000 thermocycles (5–55°C) and immersion in HCl (pH 1.2) for 15 h. Optical properties, crystalline structure, and surface roughness were analyzed and compared using analysis of variance (5% significance level).ResultsThere was no statistically significant effect of aging on translucency (p = 0.10), but CRA promoted the development of a high contrast ratio (p = 0.03). Aging did not cause significant color changes for HT (p = 0.65) or XT (p = 0.36). The proportion of monoclinic crystals increased to 40% for HT‐zirconia after HA and 5% after CRA. No monoclinic crystals were detected for XT groups. There was no effect of aging on surface roughness (p = 0.77).ConclusionsAlthough hydrothermal aging has been widely used to verify zirconia crystalline stability, it did not generate an effect similar to clinically related aging on the optical properties and crystalline structure of zirconia. HA affected the crystalline structure of HT‐zirconia, and CRA compromised the optical properties of XT zirconia.

show abstract

Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 76%

Effect of artificial aging on optical properties and crystalline structure of high‐translucency zirconia

Hajhamid

Bozec

Tenenbaum

et al. 2023

Journal of Prosthodontics

Self Cite

View full text Add to dashboard Cite

show abstract

“…The values of Ra of Vitablocs Mark II, metal ceramic feldspathic materials, zirconia, and natural teeth were higher after khat immersion and TC for 5000 cycles in comparison with values observed before khat staining [ 27 ]. Similar findings were recorded by Aldosari et al [ 20 ], in which Ra affected all the tested samples (VS, VE, and VMII), and a study by Hajhamid et al on zirconia [ 7 ], offering greater values for the polished specimens next to TC. Surface treatments such as type of glazing or polishing had significant impacts on Ra and Rz after TC [ 23 ].…”

Section: Discussionsupporting

confidence: 89%

“…Ra and Rz decrease the biomechanical and esthetic value of prosthetic restorations and growing susceptibility to aging [ 18 ]. Plaque retention with surface staining consistently occurs on rough surfaces of dental restorations [ 19 , 20 ] and cause abrasive damage to opposing dentition [ 21 ]; however, it can also be weakened by the presence of surface flaws or/and cracks, which can lead to prosthesis and ceramic material failure [ 7 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Thermocycling on Color, Surface Characteristics, Compressive Fracture, and Fracture Modes of Prosthetic CAD/CAM Ceramics After Smokeless Tobacco Immersion

Alqahtani

2022

Med Sci Monit

View full text Add to dashboard Cite

Background The study aimed to assess effect of smokeless tobacco (ST) immersion with thermocycling (TC) on color of Vita Classical shade-guide, surface roughness (Ra) and roughness depth (Rz), and compressive fracture force (CFF) of hybrid polymer-infiltrated-feldspathic ceramic (Vita Enamic), leucite-Feldspathic glass (Vitablocs ® Mark II), and zirconia-reinforced lithium silicate (Vita Suprinity) CAD/CAM prosthetic ceramic materials. Material/Methods A 48 samples were milled from Vita Enamic, Vita mark II, and Vita Suprinity. VitaPan shade-guide, Ra, and Rz were registered before ST immersion. Then, the same parameters were recorded again after 15 days of ST staining with and without TC. CFFs and fracture modes of samples after 3 months of aging were documented. Results A slight change was observed in VitaPan shade-guide. Ra and Rz of Vita Suprinity (VS) recorded the highest values among ceramic groups at 3 time intervals. Increases in Ra and Rz were observed after immersion and staining with TC. ANOVA and Bonferroni post hoc tests were used. Significant differences among and between groups were noticed only before immersion in ST and TC, with P value ≥0.00. The highest mean value and SD of CFFs (MPa and Newton) were recorded in Vita Suprinity, followed by Vita Enamic (VE) and Vita mark II (VMII). Reparable fracture was higher in VMII and VS. Conclusions ST staining and TC caused color changes in VitaPan shade-guide and increases in Ra and Rz of tested materials, with highest and lowest values recorded in VS and VE. CFFs were marginally equal to clinically accepted values for VS and equal or slightly higher than the half values for VE and VMII groups.

show abstract

“…Furthermore, the crown post treatment such as make‐up (staining, grazing) and glazing may improve the aesthetic outcome for the zirconia, but it is also subject to degradation and ageing (Manziuc et al, 2021). A recent systematic review evaluated the impact of low‐temperature degradation on different types of zirconia and concluded that the optical properties degrade with time (Alfrisany & De Souza, 2022; Hajhamid et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

Five‐year outcomes of a randomized controlled clinical trial comparing single‐tooth implant‐supported restoration with either zirconia or titanium abutments

Ferrantino

Albornoz

Sanz

2023

J Clinic Periodontology

View full text Add to dashboard Cite

Aim To evaluate the influence of the abutment material (zirconia vs. titanium) on the long‐term aesthetic and clinical outcomes of implant‐supported restorations. Materials and Methods In 30 patients, a single implant‐supported restoration with either a zirconia or a titanium abutment was placed in the anterior maxilla (incisors, canines, and bicuspids). Aesthetic (Implant Crown Aesthetic Index or ICAI), clinical, radiographic, and patient‐centred outcomes were recorded at baseline (1 month after final restoration), 1 year, and 5 years of follow‐up. This study was registered in http://clinicaltrials.gov (NCT02315794). Results Twenty‐five subjects completed the follow‐up visits at 1 and 5 years. ICAI values showed statistically significant better aesthetic outcomes when zirconia abutments were used compared to titanium abutments. Between 1 and 5 years, the aesthetic sub‐analysis of the crown component worsened but the mucosal sub‐analysis improved. There were no significant changes in bone levels, but the plaque index, bleeding on probing, and probing depths worsened in both groups. Conclusions At 5 years, standard zirconia abutments achieved better aesthetic outcomes, although with similar clinical behaviour.

show abstract

The effect of accelerated aging on crystalline structures and optical properties of different monolithic zirconia: A qualitative systematic review

Cited by 15 publications

References 70 publications

Effect of artificial aging on optical properties and crystalline structure of high‐translucency zirconia

Effect of artificial aging on optical properties and crystalline structure of high‐translucency zirconia

Effect of Thermocycling on Color, Surface Characteristics, Compressive Fracture, and Fracture Modes of Prosthetic CAD/CAM Ceramics After Smokeless Tobacco Immersion

Five‐year outcomes of a randomized controlled clinical trial comparing single‐tooth implant‐supported restoration with either zirconia or titanium abutments

Contact Info

Product

Resources

About