The effect of staining and vacuum sintering on optical and mechanical properties of partially and fully stabilized monolithic zirconia

Sulaiman, Taiseer A.; Abdulmajeed, Aous A.; Donovan, Terence E.; Vallittu, Pekka K.; Närhi, Timo; Lassila, Lippo

doi:10.4012/dmj.2015-054

Cited by 107 publications

(82 citation statements)

References 18 publications

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“…After reading and analyzing the full texts of the 11 studies, the following factors were studied in terms of their effects on the alteration of sintering of monolithic zirconia: Microstructure (grain size) Mechanical properties Optical properties …”

Section: Resultsmentioning

confidence: 99%

“…Another method of improving translucency involves increasing the Y 2 O 3 content and sintering temperature and/or sintering duration. The translucency of zirconia is additionally influenced by the ceramic brand and thickness, ceramic shade, primary grain size, refractive index, atmospheric conditions while sintering, surface roughness, contrast ratio, acidic medium, and staining, whereas the contrast ratio is affected by the zirconia brand and thickness, grain size, sintering temperature and duration, and translucency . Color is affected by the number of firings, ceramic brand, ceramic thickness, cement color, cement thickness, abutment color, sintering temperature and duration, and number of coloring liquid applications .…”

Section: Discussionmentioning

confidence: 99%

“…Sintering in a vacuum furnace appears to improve the flexural strength of zirconia. However, vacuum sintering also significantly enhances the translucency of partially sintered zirconia and has no significant effects on fully sintered zirconia …”

Section: Discussionmentioning

confidence: 99%

“…The most common sintering method for zirconia uses conventional furnaces at temperatures between 1350°C and 1400°C and holding times ranging from 2 to 4 hours . Conventional sintering furnaces include resistively heated atmospheric furnaces but also utilize hot press and hot isostatic pressure.…”

Section: Introductionmentioning

confidence: 99%

“…Several other alterative sintering methods for zirconia have been proposed that aim to improve the mechanical and optical properties of zirconia and increase the ease of operation and control of sintering energy, resulting in high productivity, safety and reliability. Among these alternative methods are spark plasma sintering, microwaves, and vacuum furnaces …”

Section: Introductionmentioning

confidence: 99%

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The influence of altering sintering protocols on the optical and mechanical properties of zirconia: A review

Ahmed

Troczynski

McCullagh

et al. 2019

J Esthet Restor Dent

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Objective As a result of advancements in chairside technology and speed sintering techniques and increased esthetic demands of patients, efforts have been made to produce monolithic zirconia restorations that are highly translucent, strong, and dense. While methods for processing zirconia are well known, there is a tendency to modify the process parameters with the aim of decreasing the overall processing time and, in particular, the sintering time. This review provides clinicians with scientific evidence of the effects of altering sintering parameters used for dental zirconia on its microstructure, phase transformation, and mechanical and optical properties. Materials and Methods A systematic search of Embase and Medline using Boolean operators was performed to locate relevant articles. Results Eleven articles were selected for this review. The following characteristics of monolithic zirconia have been confirmed to be affected by alterations in sintering: the microstructure, mechanical properties, optical properties, wear behavior, and low thermal degradation. Conclusions The alteration of sintering parameters has been found to alter the grain size, wear behavior, and translucency of zirconia. There is a lack of clinical studies that investigate the influence of altering sintering parameters or methods on the clinical performance of monolithic zirconia restorations. Clinical Significance Alteration of sintering parameters alters the microstructural, mechanical, and optical properties of zirconia. This will consequently impact the clinical performance of zirconia prostheses. Future clinical investigations are encouraged to support these in vitro findings.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The influence of altering sintering protocols on the optical and mechanical properties of zirconia: A review

Ahmed

Troczynski

McCullagh

et al. 2019

J Esthet Restor Dent

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Fit of tooth‐supported zirconia single crowns—A systematic review of the literature

Ahmed

Shariati

Gazzaz

et al. 2020

Clinical & Exp Dental Res

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Purpose The purpose of this study is to systematically map all the factors that influence the fit and adaptation of zirconia crowns and/or copings. Materials and methods The investigational strategy involved carrying out an electronic search between December 1, 2009 and September 1, 2019 through the Embase and Medline databases using Boolean operators to locate appropriate articles. Results A total of 637 articles were discovered after the removal of duplicates, and 46 of these were selected for evaluation. Further, a quality assessment was performed using GRADE evaluation criteria. Conclusions Shoulder finish line preparations had slightly better marginal fit compared to chamfer finish lines. Crowns obtained from digital impressions had comparable to superior marginal adaptation compared to conventional impressions. Increasing cement space showed to improve zirconia crown adaptation. Cementation and veneering zirconia frameworks found to increase the marginal and internal gaps. Limited information is available on the effect of the alteration of sintering time/Temperature and/or sintering techniques on the adaptation of zirconia crowns. Most of the selected studies had a moderate quality assessment evaluation. Future studies could investigate the chair‐side, ultra‐fast sintering effect on the marginal gap of zirconia crowns.

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Prospective evaluation of implants‐supported, tooth‐implant supported, and teeth‐supported 3‐unit posterior monolithic zirconia fixed restorations: Bite force and patient satisfaction

Altayyar,

Al‐zordk,

Algabri

et al. 2023

Clinical & Exp Dental Res

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ObjectivesThis study aimed to evaluate the maximum bite force (MBF) and satisfaction of patients restored with implants, combined tooth‐implants, and teeth‐supported monolithic zirconia fixed dental prostheses (FDPs).Materials and MethodsThirty partially edentulous patients in need of three units of FDPs in their mandibular posterior region were divided into three equal groups (n = 10) as follows: Group‐1 patients received two implants for each at the second premolar and second molar regions, Group‐2 patients received one implant for each at the second molar region, and Group‐3 patients with missing lower first molar. All the restorations were constructed from monolithic zirconia. Patients were evaluated 1 week after placement of restorations (baseline) and then after 6, 12, and 24‐month intervals for MBF using force transducer occlusal force meter and satisfaction (function, esthetic, and overall satisfaction) using a visual analog scale.ResultsThe mean MBF for Group 1 was higher than Group 2 (p = .044) but not that of Group 3 (p = .923). Additionally, Group 3 displayed a higher MBF than Group 2, although this difference was not statistically significant (p = .096). Concerning patient satisfaction, all study groups reported high levels of satisfaction across all satisfaction elements, and no significant differences were observed between the groups.ConclusionWithin the limitations of this study, it can be concluded that Group 1 gives comparable anticipated treatment outcomes as Group 3 concerning biting force and patient satisfaction. However, Group 2 gives comparable satisfaction results with biting force value within the normal range; thus, it might be used as a treatment option in a specific situation.

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The effect of staining and vacuum sintering on optical and mechanical properties of partially and fully stabilized monolithic zirconia

Cited by 107 publications

References 18 publications

The influence of altering sintering protocols on the optical and mechanical properties of zirconia: A review

The influence of altering sintering protocols on the optical and mechanical properties of zirconia: A review

Fit of tooth‐supported zirconia single crowns—A systematic review of the literature

Prospective evaluation of implants‐supported, tooth‐implant supported, and teeth‐supported 3‐unit posterior monolithic zirconia fixed restorations: Bite force and patient satisfaction

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