A Survey on the Current Trends of Different Polishing Protocols for Monolithic Zirconia Restorations amongst Dental Practitioners in Mumbai and Navi Mumbai (original) (raw)
Related papers
In vitro performance of full-contour zirconia single crowns
Dental Materials, 2012
d e n t a l m a t e r i a l s 2 8 ( 2 0 1 2 ) 449-456 Zirconia CAD/CAM Veneering porcelain Full-contour Single crown a b s t r a c t Objectives. Zirconia based restorations exhibited high failure rates due to veneering-porcelain fractures. Milling to full-contour might be an alternative approach for zirconia restorations. The aim of this study was to evaluate full-contour zirconia crowns in terms of light-transmission, contact wear (restoration and antagonist) and load-bearing capacity. Powder build-up veneered zirconia substructures and CAD/CAM-veneered zirconia substructures served as controls.
Zirconia Use in Dentistry - Manufacturing and Properties
Current Health Sciences Journal, 2019
Several types of metal-free ceramics have been developed to meet the patients demand for natural looking appearance restorations. Owing to their biocompatibility and good mechanical properties zirconia has been successfully used in recent years as a dental biomaterial. Due to its high opacity zirconia cores are generally covered with ceramic veneers that provide a more natural appearance but have frequent incidence of chipping. As an alternative to veneered zirconia full-contour zirconia restorations become more widely used nowadays. The paper reviews the current knowledge and scientific data of the zirconia use in dentistry in order to compare the zirconia based dental restorations with the metal-ceramic ones and also the two types of dental restoration based on zirconia, veneered or monolithic zirconia.
Effect of surface treatment on the retention of zirconia crowns to tooth structure after aging
Journal of Esthetic and Restorative Dentistry, 2020
Objective: To evaluate the effect of different surface treatments on the retention between zirconia crowns and tooth structure after in vitro aging. Materials and methods: Human third molars (n = 44) received crown preparations and CAD/CAM zirconia crowns were manufactured. Specimens were divided into two groups: no aging, control (NAC, n = 11) or aging (A, n = 33). NAC were bonded with universal adhesive (UA). Aged specimens were divided into three subgroups (n = 11) according to surface treatment: Control: no abrasion + UA; Alumina: alumina abrasion + UA; Silica: tribochemical silica coating + UA. The crowns were cemented with dual-cure resin cement. Specimens in group A were aged by a combination of mechanical, thermal, and pH cycling. Retention strength values were obtained by tensile tests and results were analyzed by one-way analysis of variance (ANOVA) and Tukey test (P < .05). Results: Aging decreased the retention strength in control specimens (P < .001). Surface treatment improved the retention strength of aged specimens (P < .001), with similar results between alumina and tribochemical silica coating. Conclusion: The chemical interaction between the universal bonding system and zirconia's surface was not sufficient to withstand artificial aging. Tribochemical silica coating did not promote additional retention in comparison to alumina blasting. Clinical significance: The long-term retention of translucent zirconia crowns to tooth structure using phosphate-based materials is improved by means of mechanical surface treatments such as alumina blasting and tribochemical silica coating. K E Y W O R D S airborne particle abrasion, aging, translucent zirconia, universal adhesive, zirconia crown 1 | INTRODUCTION Polycrystalline tetragonal zirconia stabilized with 3 mol% of yttria (3Y-TZP) has been largely used for the restoration of heavily destroyed teeth. 1 In spite of having excellent mechanical properties and biocompatibility, 3Y-TZP exhibits a high level of opacity and needs to be veneered with porcelain to mimic the optical properties of the tooth structure. 2,3 One of the strategies to enhance translucency of zirconia is to increase the yttria content to 4 mol% (4Y-PSZ) or 5 mol % (5Y-PSZ), resulting in partially stabilized materials. 4 The higher yttria content introduces an optically isotropic cubic phase into the crystalline phase composition of zirconia, which minimizes opacity and makes zirconia more suitable for monolithic anterior restorations. 4-6
Journal of Prosthodontic Research
The purpose of this systematic review was to evaluate the survival rate, biological complications, technical complications, and clinical behavior of single crowns supported by teeth made up in monolithic zirconia with CAD/CAM technology. Study selection: An extensive electronic search was conducted through Medline/PubMed, Embase, and Cochrane Library databases. Additional manual search was performed on the references of included articles to identify relevant publications. Two reviewers independently performed the selection and electronic and manual search. Results: From nine articles included, there was a total of 594 participants and 1657 single-tooth restorations with a mean exposure time of 1.07 years, and follow-up period between 0.3 and 2.1 years. All studies showed a moderate level of quality, with a consequent moderate possibility of associated bias, using the Newcastle-Ottawa Scale (NOS), with survival rate (SR) ranging between 91% to 100%. Bleeding on probing (BOP) were reported with an average value of 29.12%. Marginal integrity showed high success rate values for the observation periods, except for one that included patients with bruxism which obtained a SR of 31.60%. Failures and/or fractures, mostly total and requiring replacement, were observed in three studies. Linear regression showed that there was no statistical correlation between survival rate and type of cementation and the average years of follow-up (p=0.730 e p=0.454). There was high heterogeneity between studies (I2 = 93.74% and Q = 79.672). Conclusions: Within the limitation of this study, monolithic zirconia might be considered as a possible option for restoring single crowns, especially in the posterior zone.
Efficacy of zirconia crowns: A 3 year retrospective and clinical follow up study
Journal of Advanced Medical and Dental Sciences Research, 2016
Background: All-ceramic crowns have become increasingly used also in the posterior regions, but there are only few studies documenting the clinical outcome of these restorations. The aim was therefore to present the 3-year outcome of zirconia single crowns. Materials & Methods: All patients treated with porcelain-veneered zirconia single crowns in prosthodontic department. The patient records were scrutinized for data on the restorations and the supporting teeth. Information was available for 152 patients and 260crowns. At the 3-year recall appointments, a sample of 22 patients with 40 crowns was clinically examined and interviewed regarding patient satisfaction. Results: Most crowns (78%) were placed on premolars and molars. The clinical outcome of crowns was favourable. No zirconia core fractured and no caries was observed on the abutment teeth. Patient satisfaction with the zirconia crowns was in general high. Conclusions: The porcelain-veneered zirconia crowns showed good clinical results, were well accepted by the patients, and only few complications were reported over the 3-year follow-up period. Zirconia crowns can be alternative for metal-porcelein crowns in posterior teeth.
Al-Azhar Dental Journal for Girls
Purpose: The present study was conducted to evaluate the effect of veneering zirconia frameworks on the marginal and internal fit of zirconia based restorations. Materials and methods: Forty natural premolars were prepared to receive all-ceramic crowns. The forty premolars were divided into two groups according to the type of restoration. Group (I) consisted of ten samples restored using monolithic zirconia crowns. Group (II) consisted of thirty samples restored using veneered zirconia frameworks. Group II was subdivided into three equal subgroups according to veneering technique. Subgroup (IIA) veneered using manual layering technique, Subgroup (IIB) veneered using Press-on technique and Subgroup (IIC) veneered using CAD-on technique. All the finished crowns were cemented to their corresponding abutments then each tooth was vertically sectioned bucco-lingually into 2 sections. Marginal, axial and occlusal gaps were measured at seven defined points on each section using digital microscope. Results: The significance level was set at P<0.05. Regarding the marginal gap, statistical analysis revealed that there was a significant difference between groups and subgroups. The greatest mean value was recorded in subgroup IIA, veneered using manual layering technique. Whereas the lowest mean value was recorded in subgroup IIC, veneered using CAD-on technique. Regarding the internal gap statistical analysis revealed that there was a significant difference. The greatest mean value was recorded in group I (monolithic), whereas the lowest mean value was recorded in subgroup IIC, veneered using CAD-on technique. Conclusion: Veneering zirconia frameworks using the CAD-on technique produces superior marginal and internal adaptation of zirconia based restorations.
Retention and Clinical Performance of Zirconia Crowns: A Comprehensive Review
International Journal of Dentistry, 2020
Zirconia has been used for rehabilitation of edentulous spaces approximately for a decade, and there have been several reports regarding the clinical performance and retention of zirconia crowns. Outstanding mechanical properties, biocompatibility, and excellent aesthetics make zirconia-based crowns as a popular crown among the current all-ceramic crowns in restorative dentistry. However, restoration with a zirconia crown is a challenging treatment. The goal of this study was to assess the current literature to summarize the studies reporting the effective risk factors on retention of zirconia crowns to provide clinicians with a useful point of view in the decision-making process for use of these restorations. Literature based-search was performed to find related articles until August 2020 using EMBASE, Google Scholar, and MEDLINE. Search terms used were “zirconia restorations properties,” “zirconia crowns clinical performance,” “zirconia crown survival,” “biological complications,”...
Advantages and limitations of monolithic zirconia restorations
International Journal Of Community Medicine And Public Health
Due to their biocompatible nature and advantageous mechanical characteristics, zirconia treatments have been utilized effectively in by dentists for many decades. A zirconia core is typically veneered with porcelain as they are not translucent, which renders treatments poorer since the bonding between the two substances fails. All-ceramic zirconia treatments have recently been made available in the dentistry market in an effort to address this issue. In addition to the absence of chipping, monolithic zirconia (MZ) fillings appear to have the benefit of requiring less occlusal room. To advocate this comparatively recent approach for restorative therapy, however, requires scientific proof. MZ could be the optimum material for rear fixed partial prostheses in the case of powerful occlusal pressures and little occlusal restorative room, according to the findings of in vitro investigations. To come to a clear consensus, the findings should be validated by many more in vivo and especially...
A Review of Zirconia as a Dental Restorative Material
Australian Journal of Basic and Applied Sciences, 2012
The development of dental crowns is highly concerned with optimum mechanical properties, superior esthetic appearance and biocompatibility. In order to meet these requirements, structural ceramics have been improved and have become increasingly more popular in dentistry. Among the dental ceramics, zirconia is the dental restorative material most commonly used in dental restoration. This material has unique characteristics, such as high fracture toughness, biocompatibility, and color approximating the natural tooth color. However, zirconia is too opaque, which reduces the esthetic appearance of the restoration. This paper reviews zirconia as a dental material with the potential for further use in ceramic dentistry.