Fracture rates of IPS Empress all-ceramic crowns: a systematic review.

Purpose: The aim of this study was to evaluate the clinical fracture rate of crowns fabricated with the pressable, leucite-reinforced ceramic IPS Empress, and relate the results to the type of tooth restored. Materials and Methods: The database SCOPUS was searched for clinical studies involving full-coverage crowns made of IPS Empress. To assess the fracture rate of the crowns in relation to the type of restored tooth and study, Poisson regression analysis was used. Results: Seven clinical studies were identified involving 1,487 adhesively luted crowns (mean observation time: 4.5 +/- 1.7 years) and 81 crowns cemented with zinc-phosphate cement (mean observation time: 1.6 +/- 0.8 years). Fifty-seven of the adhesively luted crowns fractured (3.8%). The majority of fractures (62%) occurred between the third and sixth year after placement. There was no significant influence regarding the test center on fracture rate, but the restored tooth type played a significant role. The hazard rate (per year) for crowns was estimated to be 5 in every 1,000 crowns for incisors, 7 in every 1,000 crowns for premolars, 12 in every 1,000 crowns for canines, and 16 in every 1,000 crowns for molars. One molar crown in the zinc-phosphate group fractured after 1.2 years. Conclusion: Adhesively luted IPS Empress crowns showed a low fracture rate for incisors and premolars and a somewhat higher rate for molars and canines. The sample size of the conventionally luted crowns was too small and the observation period too short to draw meaningful conclusions. Int J Prosthodont 2010;23:129-133.

Effect finishing and polishing procedures on the surface roughness of IPS Empress 2 ceramic

Objective. To evaluate the surface roughness of IPS Empress 2 ceramic when treated with different finishing/polishing protocols. Materials and methods. Sixteen specimens of IPS Empress 2 ceramic were made from wax patterns obtained using a stainless steel split mold. The specimens were glazed (Stage 0-S0, control) and divided into two groups. The specimens in Group 1 (G1) were finished/polished with a KG Sorensen diamond point (S1), followed by KG Sorensen siliconized points (S2) and final polishing with diamond polish paste (S3). In Group 2 (G2), the specimens were finished/polished using a Shofu diamond point (S1), as well as Shofu siliconized points (S2) and final polishing was performed using Porcelize paste (S3). After glazing (S0) and following each polishing procedure (S1, S2 or S3), the surface roughness was measured using TALYSURF Series 2. The average surface roughness results were analyzed using ANOVA followed by Tukey post-hoc tests (α = 0.01) Results. All of the polishing procedures yielded higher surface roughness values when compared to the control group (S0). S3 yielded lower surface roughness values when compared to S1 and S2. Conclusions. The proposed treatments negatively affected the surface roughness of the glazed IPS Empress 2 ceramic. © 2013 Informa Healthcare.

Influence of the activation mode of a self-etch resin-based luting cement upon the metabolism of odontoblast-like cells

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

In Vitro Study of Fracture Load and Fracture Pattern of Ceramic Crowns: A Finite Element and Fractography Analysis

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Estudo dos procedimentos utilizados para obtenção de microrretenções na superfície interna da porcelana: avaliação por meio de testes de rugosimetria e microscopia eletrônica de varredura

Pós-graduação em Ciências Odontológicas - FOAR

Avaliação de tratamentos de superfície em diferentes sistemas cerâmicos e seu efeito na resistência de união a um cimento resinoso

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Surface roughness analysis of dental ceramics treated with hydrofl uoric acid and aluminum oxide jet

The aim of this study was to evaluate the surface roughness of 5 indirect restorative materials treated with hydrofluoric acid to 10%, with aluminum oxide jet and a combination of both. The specimens was prepared with 10 mm in diameter and 2 mm thickness, divided into fi ve groups: (1) Ceromer (CeseadII-Kuraray), (2) Leucite crystals ceramics (IPS EmpressIIIvoclarforcasket), (3) glass ceramic with fluorapatite (IPS D. Sign-Ivoclar), (4) lithium disilicate ceramic (IPS Empress II-Ivoclar restorations), (5) ceramics (Cergogold-Degussa). For all groups were performed the controls, and the surfaces with the 3 types of treatment. For testing roughness used the rugosimeter Taylor/Hobson-Precision, model form tracerSV-C525 high sensitivity. After confi rmation of variance analysis with a signifi cance level of 1% (p < 0.01), there was equality between the average roughness of materials from groups 1, 3 and 5, and the group 2 was different from the others. It was also found that the ceramics of the group 5 behaved similar to group 4. However the lowest average roughness was observed in group 2 ceramic. In the evaluation between the types of treatment, the aluminum oxide jet and associations and blasting with hydrofl uoric acid were similar, and different isolated hydrofl uoric acid, and 3 types of treatment signifi cantly higher than the control group. All treatments promoted superfi cial alterations in all tested materials.

Dissilicato de lítio

De forma a completar as necessidades estéticas, que são cada vez mais exigidas pela sociedade, as cerâmicas dentárias têm apresentado rápida evolução com o intuito de melhorar as suas propriedades físicas e mecânicas, como também óticas. O desenvolvimento de novos materiais permitiu a aplicação e o progresso dos sistemas totalmente cerâmicos utilizados na área da medicina dentária. Pelas suas características estéticas relativamente aos sistemas metalocerâmicos, rapidamente os sistemas totalmente cerâmicos ocuparam o seu lugar no mercado, levando à atenção de médicos dentistas, como dos próprios pacientes. Dentro destes sistemas totalmente cerâmicos, encontra-se a cerâmica reforçada com dissilicato de lítio. Esta revisão narrativa da literatura teve como objetivo descrever as características da cerâmica dissilicato de lítio de forma a tornar possível compreender em que situações clinicas poderá ser utilizada, bem como, de que forma é possível otimizar os processos laboratoriais. Para tal, foram utilizadas várias bases de dados, Pubmed, Scielo, JADA, e Science Direct, utilizando como palavras-chave: “Ceramic”, “Dental Ceramic” “Porcelain”, “Lithium Dissilicate”; “IPS e.max

Resistência à flexão, resistência à tração diametral e dureza de sistemas cerâmicos para infra-estrutura

Pós-graduação em Reabilitação Oral - FOAR

Avaliação da adaptação marginal de restaurações cerâmicas inlay após a cimentação

Pós-graduação em Odontologia Restauradora - ICT

Avaliação da microdureza de quatro cimentos resinosos duais fotopolimerizados através da interposição de diferentes materiais: estudo in vitro

Pós-graduação em Odontologia Restauradora - ICT

Análise da influência de diferentes tratamentos superficiais de sistemas cerâmicos na resistência de união adesiva

Pós-graduação em Ciências Odontológicas - FOAR

Interactions between restorative dentistry and periodontics: preparation and cementation of an onlay in Empress (Part III)

The relentless pursuit by cosmetic dentistry brought the evolution of materials ceramics. The IPS-Empress system was upgrading of indirect restorations based on lithium disilicate. The ceramic restoration posterior allow a new esthetic approach due to its translucency and resistance without any weakening of the remaining dental element, being an option more conservative when compared to conventional prosthetic restorations.

Clinical evaluation of ceramic inlays and onlays fabricated with two systems: five-year follow-up

This study evaluated the five-year clinical performance of ceramic inlays and onlays made with two systems: sintered Duceram (Dentsply-Degussa) and pressable IPS Empress (Ivoclar Vivadent). Eighty-six restorations were placed by a single operator in 35 patients with a median age of 33 years. The restorations were cemented with dual-cured resin cement (Variolink II, Ivoclar Vivadent) and Syntac Classic adhesive under rubber dam. The evaluations were conducted by two independent investigators at baseline, and at one, two, three, and five years using the modified United States Public Health Service (USPHS) criteria. At the five-year recall, 26 patients were evaluated (74.28%), totalling 62 (72.09%) restorations. Four IPS restorations were fractured, two restorations presented secondary caries (one from IPS and one from Duceram), and two restorations showed unacceptable defects at the restoration margin and needed replacement (one restoration from each ceramic system). A general success rate of 87% was recorded. The Fisher exact test revealed no significant difference between Duceram and IPS Empress ceramic systems for all aspects evaluated at different recall appointments (p>0.05). The McNemar chi-square test showed significant differences in relation to marginal discoloration, marginal integrity, and surface texture between the baseline and five-year recall for both systems (p<0.001), with an increased percentage of Bravo scores. However, few Charlie or Delta scores were attributed to these restorations. In conclusion, these two types of ceramic materials demonstrated acceptable clinical performance after five years