Effect of different surface treatment protocols on the bond strength between lithium disilicate and resin cements.

Because the use of hydrofluoric acid (HF) poses health risks if handled improperly, many clinicians prefer to have the ceramic restorations pre-etched in dental laboratories. However, during the try-in procedure, the pre-etched glass-ceramic restorations may be contaminated with saliva resulting in reduced bond strength. This in-vitro study aimed to investigate the effect of different surface treatments on the bond strength of lithium disilicate (LD) glass-ceramic restorations (IPS e.max Press, Ivoclar Vivadent) to two resin cements. One-hundred eighty blocks (4X4X3mm) of LD glass-ceramic were divided into twelve groups (n = 15), of which six received Variolink Esthetic DC (VE) cement and six received RelyX Ultimate (RU) cement, following the surface treatments: G1) Control: Hydrofluoric Acid + Silane (HF + Sil); G2) Hydrofluoric Acid + Saliva + Silane (HF + S + Sil); G3) Hydrofluoric Acid + Saliva + Ivoclean + Silane (HF + S + IC + Sil); G4) Hydrofluoric Acid + Saliva + Phosphoric Acid + Silane (HF + S + P + Sil); G5) Hydrofluoric Acid + Saliva + Monobond Etch & Prime (HF + S + EP); G6) Monobond Etch & Prime (EP). Following treatment, a resin-cement cylinder (2.3 mm diameter) was built on the glass-ceramic surface, photocured (20 s), stored in distilled water (37 °C, 24 h) and submitted to the shear bond strength test. Bond strength data (MPa) were subjected to two-way ANOVA and Tukey (α = 0.01). Cement type and surface treatment had a significant effect on the bond strength (p < 0.001) (Table 4). Single-step Monobond Etch & Prime (EP) significantly improved the bond strength of resin-cements to glass-ceramic with and without saliva contamination.

Clinical evaluation of ceramic inlays and onlays fabricated with two systems: 12-year follow-up.

OBJECTIVES: The aim of this study was to evaluate the 12-year clinical performance of sintered (Duceram, Dentsply-Degussa, Dentsply International Inc., PA, USA)-D and pressable (IPS Empress, Ivoclar-Vivadent, Schaan, Leichtenstein)-IPS ceramic inlay and onlay restorations. METHODS: Eighty-six restorations were placed in 35 patients with a median age of 33 years by a single operator. The restorations were luted with dual-cured resin luting material (Variolink II, Ivoclar-Vivadent, Schaan, Leichtenstein) and Syntac Classic adhesive under rubber dam. The evaluations were conducted by two independent investigators at the baseline, 1, 2, 3, 5, and 12 years using the modified USPHS criteria. RESULTS: At the 12-year recall, 22 patients were evaluated (62.86 %), totalling 48 (55.81 %) restorations. Seven restorations were fractured (one from Duceram and six from IPS), eight restorations presented secondary caries (three from Duceram and five from IPS), nine restorations showed unacceptable defects at the restoration margin and needed repair or replacement (two from Duceram and seven from IPS), and four IPS restorations presented pulp sensitivity. CONCLUSION: Chi-square and Mann-Whitney tests revealed that IPS Empress system showed the best results for color match and surface texture (p < 0.05) but a significant worse result for fracture (p = 0.05). Wilcoxon test showed significant differences in relation to color match, surface texture, marginal discoloration, and marginal integrity between the baseline and 12-year recall for both ceramic systems. CLINICAL SIGNIFICANCE: This long-term clinical study observed that the main reasons for failure of ceramic restorations were related to fracture, recurrent caries, and decreased marginal integrity over time. Carefully monitoring of the ceramic-tooth interface may extend their clinical longevity.

Retention of tooth-colored restorations in non-carious cervical lesions--a systematic review.

OBJECTIVES: The aim of this review was to assess the effect of different adhesive systems and tooth preparation on the retention of tooth-colored restorative materials placed in non-carious cervical lesions (NCCLs). METHODS: Randomized clinical trials with a minimum of 3 years of follow-up that evaluated the effectiveness of tooth-colored materials, adhesive systems, and preparation techniques for the restoration of NCCLs were selected. The Cochrane Central Register of Controlled Trials (CENTRAL), EMBASE (OVID), the Latin American and Caribbean Health Sciences Literature database (LILACS), and Medline (OVID) electronic databases were searched from 1990 to 2013. RESULTS: Twenty-seven randomized clinical trials were included and reviewed. Meta-analysis was used to determine the relative risk of loss of tooth-colored NCCL restorations between different categories of adhesive systems. The effect of tooth preparation could not be similarly analyzed. CONCLUSION: The current best evidence indicates that a glass ionomer cement has a significantly lower risk of loss of a NCCL restoration compared to either a three-step etch-and-rinse or a two-step etch-and-rinse adhesive system; a three-step etch-and-rinse adhesive system has a significantly lower risk of loss of a NCCL restoration compared to a two-step etch-and-rinse adhesive system. No significant difference could be observed in the risk of loss of a tooth-colored NCCL restoration between a three-step etch-and-rinse adhesive system and either a two-step self-etch or a one-step self-etch adhesive system.

Overview of CEREC CAD/CAM chairside system.

This article describes CAD/CAM technology used in dentistry and different restorative materials used in conjunction with adhesive cementation with particular attention given to the evolution of the CEREC system, as well as various ceramics developed for this system. Advantages and limitations of materials and technique are also discussed.

Current Insights on Fiber Posts: A Narrative Review of Laboratory and Clinical Studies.

PURPOSE: The aim of this study was to review the literature related to the clinical performance and laboratory findings regarding fiber posts, as well as the cementation technique employed with their use. MATERIALS AND METHODS: A literature search was performed using an electronic database, PubMed/Medline, between 2010 and 2023. The terms used were "intra coronal post, fiber post, post cementation, and post length". Titles and abstracts were initially screened, and a full-text assessment was conducted for those that fulfilled the inclusion criteria. The reference list of the collected papers was also screened for further relevant citations. RESULTS: In this work, 135 potentially eligible studies were analyzed. Titles and abstracts of 90 studies followed the inclusion criteria and were selected for a full-text assessment, resulting in 50 studies selected. Moreover, additional studies from relevant citations were included, totaling 57 studies. CONCLUSION: According to the laboratory and clinical studies revised, the survival rate between fiber and prefabricated and cast metal posts was similar, and failures were mainly related to the loss of retention. The intra-canal post length of less than two-thirds of the root length presented successful results when ferrule was present. Furthermore, the ferrule increased the longevity of teeth restored with fiber posts. Additionally, the use of a surface treatment protocol for fiber posts and the adhesive cementation technique both contributed to the clinical success and longevity of the intra-canal post.

Post-fatigue fracture load, stress concentration and mechanical properties of feldspathic, leucite- and lithium disilicate-reinforced glass ceramics.

Objective: To evaluate the mechanical properties of different CAD/CAM ceramic systems and the post-fatigue fracture and stress distribution when used as cemented crowns. Materials and methods: Sixty (60) CAD/CAM monolithic crowns were milled using three different ceramic materials (FD - Feldspathic [Vita Mark II]), LE - Leucite-based ceramic [IPS Empress CAD] and LD - Lithium Disilicate [IPS e.max CAD]) and adhesively cemented on resin composite dyes. Specimens were stored in distillated water (37 °C) for 7 days. After, half of the crowns were submitted to immediate fracture load test while the other half was submitted to fatigue cycling. The average cement layer of approximately 80 µm was assessed using scanning electron microscopy (SEM). The average thickness was used in the three-dimensional (3D) Finite Element Analysis (FEA). For each ceramic material, the density, Poisson ratio, shear modulus, Young modulus, fracture toughness, and true hardness were assessed (n = 3). The data was used to assess the Maximum Principal Stress throughout 3D-FEA according to each material during load to fail and post-fatigue. Data were submitted to two-way ANOVA and Tukey test (α = 0.05). Results: LD showed the highest compression load, density, shear modulus, Young modulus, fracture toughness and true hardness values. While LE presented the lowest mechanical properties values. There is no difference in the Poisson ratio between the evaluated ceramics. Conclusion: LD was susceptible to aging process but presented stronger physicomechanical properties, showing the highest post-fatigue fracture load and highest stress magnitude.

In vitro shear bond strength of resin-based luting cements to dentin.

The aim of this study was to determine how resin cement, self-adhesive resin cement, and resin-modified glass ionomer cement affected shear bond strength to dentin. Sixty composite resin disks (3 mm in diameter x 3 mm in length) were prepared and divided into four groups (n = 15): Group 1, composite disk bonded to dentin with composite resin and a bonding agent; Group 2, composite disk bonded to dentin with a self-adhesive resin cement; Group 3, composite disk bonded to dentin with a different self-adhesive resin cement; and Group 4, composite disk bonded to dentin with a resin-modified glass ionomer cement. The composite resin was loaded into a syringe (internal diameter 3 mm), photocured in an oven, and cut into 3 mm slices with a low-speed saw. The samples were bonded to dentin per the manufacturer's instructions. All specimens were stored in distilled water (at 37 degrees C) for 24 hours. The shear bond strength test was conducted using a universal testing machine at a crosshead speed of 0.5 mm/min until failure. Conventional resin cement and a bonding agent exhibited significantly higher shear bond strength values than all other materials tested.

Shear bond strength of resin cement bonded to alumina ceramic after treatment by aluminum oxide sandblasting or silica coating.

PURPOSE: To evaluate the shear bond strength and bond durability between a dual-cured resin cement (RC) and a high alumina ceramic (In-Ceram Alumina), subjected to two surface treatments. MATERIALS AND METHODS: Forty disc-shaped specimens (sp) (4-mm diameter, 5-mm thick) were fabricated from In-Ceram Alumina and divided into two groups (n = 20) in accordance with surface treatment: (1) sandblasting by aluminum oxide particles (50 µm Al(2) O(3) ) (SB) and (2) silica coating (30 µm SiO(x) ) using the CoJet system (SC). After the 40 sp were bonded to the dual-cured RC, they were stored in distilled water at 37°C for 24 hours. After this period, the sp from each group were divided into two conditions of storage (n = 10): (a) 24 h-shear bond test 24 hours after cementation; (b) Aging-thermocycling (TC) (12,000 times, 5 to 55°C) and water storage (150 days). The shear test was performed in a universal test machine (1 mm/min). RESULTS: ANOVA and Tukey (5%) tests noted no statistically significant difference in the bond strength values between the two surface treatments (p = 0.7897). The bond strengths (MPa) for both surface treatments reduced significantly after aging (SB-24: 8.2 ± 4.6; SB-Aging: 3.7 ± 2.5; SC-24: 8.6 ± 2.2; SC-Aging: 3.5 ± 3.1). CONCLUSION: Surface conditioning using airborne particle abrasion with either 50 µm alumina or 30 µm silica particles exhibited similar bond strength values and decreased after long-term TC and water storage for both methods.

Adhesive cementation of etchable ceramic esthetic restorations.

This article describes the different materials and techniques that are used for adhesive cementation. Particular attention is given to treatments suitable for dentin, as well as the selection of surface treatments for various restorative materials. Factors related to the durability and stability of the adhesive process, as well as the clinical and laboratory procedures required for cementation, are also discussed.

The effect of prophylactic powders on the surface roughness of enamel.

OBJECTIVE: To assess the effect of dental prophylactic methods on the surface roughness of enamel. METHODS: Enamel specimens (150) were sectioned from human molars and mounted on resin bases. This work consisted of two parts. In the first, there were eight groups (n = 15). Three groups were treated with two air-polishing devices (AP)­LM-ProPower AirLED (Mode 1 and 2) and EMS Air-Flow Handy 2­for 30 seconds and sodium bicarbonate prophylactic powder, and three other groups were treated with the two air-polishing devices using microsphere calcium carbonate prophylactic powder. The seventh group was treated with rubber-cup polishing using medium and fine grits (Oral-B prophy paste), and the eighth (control) was enamel with no surface treatment. In the second part of the work, two groups (n = 15) were subjected to treatment with the LM unit (Mode 2) and each of the abrasive powders for 5 seconds. Surface roughness (Ra) of samples was assessed using a mechanical stylus profilometer and scanning electron microscope (SEM). Statistical analysis of the data was conducted using two-way ANOVA and Tukey HSD (honest significant difference) rank order test at P = 0.05. RESULTS: Both prophylactic methods resulted in a statistically significant increase in surface roughness (P < 0.05) when compared to untreated specimens. All air-abrasive treatments for 30 seconds resulted in an increase in roughness compared to rubber-cup prophylaxis (P < 0.05). However, AP with calcium carbonate and the sodium bicarbonate for 5 seconds produced results that were not significantly different from rubber-cup prophylaxis (P > 0.05). CONCLUSION: Both types of prophylactic dental cleaning have an effect on surface roughness. The abrasiveness of APs depends upon the length of treatment and the type of powder used.

Microleakage and microtensile bond strength of silorane-based and dimethacrylate-based restorative systems.

OBJECTIVE: To evaluate the microleakage and bond strengths (microTBS) of silorane-based (SBC) and dimethacrylate-based (DBC) restorative systems. The null hypotheses are: 1) there is no difference in microleakage between the resin composites and the adhesive systems tested at the enamel and dentin margins; 2) there is no significant difference in microTBS between the composite restorative systems using self-etch and etch-and-rinse adhesive versions. METHODS AND MATERIALS: Microleakage: Class V cavity preparations with cervical margin in dentin were performed on pristine extracted human molars and were randomly distributed among the following three groups: Group 1-DBC/etch-and-rinse adhesive system (Filtek™ Supreme Ultra/Adper™ Single Bond Plus, 3M ESPE, www.3MESPE.com); Group 2-SBC/self-etch adhesive (Filtek LS Low Shrink Posterior Restorative System/LS self-etch adhesive, 3M ESPE); Group 3-DBC/self-etch adhesive (Filtek Supreme Ultra/ Adper Easy Bond Self-Etch, 3M ESPE). Restorations were thermocycled and immersed in 0.2 percent methylene blue dye for 24 hours. Samples were assessed visually under 10x magnification; microTBS: Bond sticks (0.9 mm2) were prepared from each group and tested on a universal testing machine. RESULTS: The Kruskal-Wallis test revealed no significant difference in microleakage among the experimental groups at the enamel margin (P=0.191). At the dentin margins, silorane/self-etch restorative system showed significantly less leakage than the dimethacrylate/etch-and-rinse restorative system (P=0.008). Tukey's B rank order test showed that the dimethacrylate/etch-and-rinse restorative system presented the highest microTBS. CONCLUSIONS: SBC/self-etch system showed less microleakage at the dentin margins, while DBC/etch-and-rinse system presented higher bond strength.

CAD/CAM technology and esthetic dentistry: a case report.

Advances in dental materials as well as in computer technology have made CADCAM-fabricated restorations not just possible in dentistry but plentiful. When using CADCAM systems, operators can fabricate restorations from several materials, including ceramics, metal alloys, and various composites. This case report describes the replacement of a porcelain-layered zirconia-based (coping) crown on a left lower cuspid that presented with a veneering ceramic chipping on a lithium-disilicate CADCAM-fabricated crown. It demonstrates how all-ceramic systems offer a promising alternative in the restoration of anterior teeth.

Hardening of a dual-cure resin cement using QTH and LED curing units.

OBJECTIVE: This study evaluated the surface hardness of a resin cement (RelyX ARC) photoactivated through indirect composite resin (Cristobal) disks of different thicknesses using either a light-emitting diode (LED) or quartz tungsten halogen (QTH) light source. MATERIAL AND METHODS: Eighteen resin cement specimens were prepared and divided into 6 groups according to the type of curing unit and the thickness of resin disks interposed between the cement surface and light source. Three indentations (50 g for 15 s) were performed on the top and bottom surface of each specimen and a mean Vickers hardness number (VHN) was calculated for each specimen. The data were analyzed using two-way ANOVA and Tukey-Kramer test was used for post-hoc pairwise comparisons. RESULTS: Increased indirect resin disk thickness resulted in decreased mean VHN values. Mean VHN values for the top surfaces of the resin cement specimens ranged from 23.2 to 46.1 (QTH) and 32.3 to 41.7 (LED). The LED curing light source produced higher hardness values compared to the QTH light source for 2- and 3-mm-thick indirect resin disks. The differences were clinically, but not statistically significant. Increased indirect resin disk thickness also resulted in decreased mean VHN values for the bottom surfaces of the resin cement: 5.8 to 19.1 (QTH) and 7.5 to 32.0 (LED). For the bottom surfaces, a statistically significant interaction was also found between the type of curing light source and the indirect resin disk thickness. CONCLUSION: Mean surface hardness values of resin cement specimens decreased with the increase of indirect resin disk thickness. The LED curing light source generally produced higher surface hardness values.

Intensity of quartz-tungsten-halogen light polymerization units used in dental offices in Brazil.

PURPOSE: To determine the intensity of quartz-tungsten-halogen light polymerization units in dental offices in El Salvador, Brazil. MATERIALS AND METHODS: A team of researchers visited 100 offices in 2003. The team measured light intensity with a radiometer. The age and make of the units and the availability of light meters were recorded. RESULTS: One hundred twenty quartz-tungsten-halogen units were tested. Intensity ranged from 10 to 1,000 mW/cm2, with mean of 255.8 mW/cm2. Almost half (48%) of the units had values equal to or less than 200 mW/cm2. Their age ranged from 1 to 21 years. None of the offices had light meters. CONCLUSIONS: Clinicians should periodically monitor light intensity and carry out maintenance on their light polymerization units.

Hardening of a dual-cure resin cement using QTH and LED curing units

OBJECTIVE: This study evaluated the surface hardness of a resin cement (RelyX ARC) photoactivated through indirect composite resin (Cristobal) disks of different thicknesses using either a light-emitting diode (LED) or quartz tungsten halogen (QTH) light source. MATERIAL AND METHODS: Eighteen resin cement specimens were prepared and divided into 6 groups according to the type of curing unit and the thickness of resin disks interposed between the cement surface and light source. Three indentations (50 g for 15 s) were performed on the top and bottom surface of each specimen and a mean Vickers hardness number (VHN) was calculated for each specimen. The data were analyzed using two-way ANOVA and Tukey-Kramer test was used for post-hoc pairwise comparisons. RESULTS: Increased indirect resin disk thickness resulted in decreased mean VHN values. Mean VHN values for the top surfaces of the resin cement specimens ranged from 23.2 to 46.1 (QTH) and 32.3 to 41.7 (LED). The LED curing light source produced higher hardness values compared to the QTH light source for 2- and 3-mm-thick indirect resin disks. The differences were clinically, but not statistically significant. Increased indirect resin disk thickness also resulted in decreased mean VHN values for the bottom surfaces of the resin cement: 5.8 to 19.1 (QTH) and 7.5 to 32.0 (LED). For the bottom surfaces, a statistically significant interaction was also found between the type of curing light source and the indirect resin disk thickness. CONCLUSION: Mean surface hardness values of resin cement specimens decreased with the increase of indirect resin disk thickness. The LED curing light source generally produced higher surface hardness values.

Resistência ao cisalhamento da união de um cimento resinoso a um cerômero submetido a diferentes tratamentos de superfície / Shear bond strength of a resin cement and a ceromer submitted to different surface treatments

Este estudo avaliou a influência de diferentes tratamentos de superfície na resistência de união de um cimento resinoso (Rely X – 3M ESPE) a um cerômero (Cristobal – Microdont). Quarenta discos da resina foram confeccionados (3,0 x 4,0 mm), fixados em cilindros plásticos e divididos em cinco grupos, de acordo com o tratamento de superfície: 1 –condicionamento com ácido fosfórico 37% por 15 segundos (controle); 2 – jateamento com óxido de alumínio 50 μm por 15 segundos; 3 - jateamento com óxido de alumínio mais aplicação de silano por 1 minuto; 4 - jateamento com óxido de alumínio, ácido fosfórico 37% e silano; 5 - jateamento com sílica 30 μm (Cojet - 3M Dental) e silano. Após, foi aplicado sistema adesivo (Single Bond 2 – 3M) e o cimento resinoso inserido na superfície do compósito através de uma matriz circular de teflon (3,0 x 3,0 mm). O cimento foi fotoativado (Optilight / Gnatus - 400 mW/cm2) por 40 segundos. Após armazenamento em água destilada (± 37ºC / 24 horas), foi realizado ensaio de cisalhamento na máquina de ensaio universal (EMIC DL 2000, velocidade: 1 mm/min). Os valores obtidos foram: Grupo 1 – 7,29 MPa; Grupo 2 – 22,13 MPa; Grupo 3 – 20,43 MPa; Grupo 4 – 22,93 MPa; Grupo 5 – 23,58 MPa. Os dados foram submetidos à análise de variância e ao teste de Tukey (5%). Apenas o grupo controle apresentou diferença estatisticamente significante dos demais. O jateamento com óxido de alumínio ou sílica resultou no aumento da resistência de união entre cimento resinoso e cerômero.

This study evaluated the influence of different surface treatments on the bond strength of a ceromer (Cristobal – Microdont) and resin cement (Rely X – 3M Dental). Forty composite resin blocks were manufactured (3.0 x 4.0 mm), fixed in plastic cylinders, and they were divided into five groups, according to the surface treatment: 1- etched with 37% phosphoric acid for 15 seconds (control); 2 – sandblasted with 50 μm aluminum oxide particles; 3 – sandblasted with aluminum oxide and silaneted for 1 minute; 4 – sandblasted with aluminum oxide, etched with 37% phosphoric acid and silaneted; 5 – sandblasting with 30 μm silica particles and silaneted. After, the adhesive system (Single Bond 2 – 3M) was applied and the resin cement was inserted on composite resin surface with the help of a circular mold (3.0 x 3.0 mm). The cement was cured (QTH – Optilight / Gnatus – 400 mW/cm²) for 40 seconds. The specimens were placed in distilled water (± 37ºC) for 24 hour, and the shear bond test was performed in a universal machine (EMIC DL 2000, speed: 1 mm/min). The values obtained were: Group 1 – 7.29 MPa; Group 2 – 22.13 MPa; Group 3 – 20.43 MPa;Group 4 – 22.93 MPa; Group 5 – 23.58 MPa. The results were submitted to the analysis of variance and Tukey’s test (5%). Only the control group presented a statistically different result compared to the other groups. Sandblasting with aluminum oxide or silica particles increased the bond strength of the composite resin and the resin cement.

Restauraçäo em cerâmica IPS Empress: relato de caso clínico / Ceramic restoration IPS-Empress: a clinical case report

A exigência estética na sociedade atual ultrapassou a barreira dos dentes anteriores. Hoje, o sorriso perfeito é aquele que näo apresenta as seqüelas da doença cárie. Este conceito engloba tanto os dentes anteriores como os posteriores. Como opçöes restauradoras estéticas, as resinas compostas e as cerâmicas vêm sendo os materiais mais utilizados. As cerâmicas têm se destacado na classe odontológica, em funçäo das suas características e têm sido requisitadas, principalmente quando se torna necessário restaurar cavidades extensas. Neste trabalho säo descritos os tipos de cerâmicas disponíveis no mercado e, mediante a apresentaçäo de um caso clínico, procurou-se demonstrar as indicaçöes, tipo de preparo, moldagem e cimentaçäo de duas inlays cerâmicas, confeccionadas pelo sistema IPS Empress

Avaliaçäo clínica de inlays e onlays confeccionadas com dois tipos de cerâmica após 02 anos / Clinical evaluation of ceramic inlays and onlays made with two systems after 2 years

As restauraçöes em cerâmica pura têm sido uma opçäo restauradora largamente utilizada em dentes posteriores devido a sua excelente estética. Diversos tipos de sistemas cerâmicos estäo disponíveis no mercado para a fabricaçäo de restauraçöes parciais e coroas. Este trabalho teve o objetivo de avaliar o comportamento clínico de restauraçöes, do tipo inlay e onlay, confeccionadas com dois sistemas cerâmicos: cerâmica convencional (Duceram, Dentsply-Degussa) - D e cerâmica prensada (IPS Empress, Ivoclar-Vivadent)-IPS pelo período de 02 anos. Oitenta e seis restauraçöes, sendo 44 IPS e 42 D, foram cimentadas em 35 pacientes de ambos os sexos, com idade média de 35 anos. Vinte e sete pré-molares e cinquenta e nove molares receberam preparos cavitários classe II, num total de 33 onlays e 53 inlays. Todas as restauraçöes foram fixadas com cimento resinoso dual (Variolink II, Ivoclar-Vivadent) e sistema adesivo Syntac (Primer e Adhesive) e Heliobond (Ivoclar-Vivadent), sob isolamento absoluto. Os procedimentos operatórios foram realizados por apenas um operador. As avaliaçöes foram realizadas por dois examinadores independentes no baseline, após 01 e 02 anos mediante o critério USPHS modificado, quanto aos aspectos: sensibilidade pulpar, reincidência de cárie, fratura, reproduçäo de cor, descoloraçäo marginal, integridade marginal e textura superficial. Adicionalmente, radiografias e slides foram feitos. Após 02 anos, 100 por cento das restauraçöes foram reavaliadas e consideradas clinicamente excelentes ou aceitáveis. Dentre os itens analisados os seguintes apresentaram critério Bravo: descoloraçäo marginal - IPS (31,82 por cento); D (23,81 por cento); integridade marginal - IPS (18,18 por cento); D (11,9 por cento); reproduçäo de cor - IPS (4,55 por cento); D (9,52 por cento) e textura superficial - IPS (2,27 por cento); D (14,29 por cento). Nenhum escore "Charlie" ou "Delta foi atribuído às restauraçöes. Os resultados obtidos foram submetidos ao Teste Estatístico de Fisher e McNemar. Näo houve diferença estatisticamente significante entre as cerâmicas testadas após 02 anos. Dentre os aspectos avaliados, o item descoloraçäo marginal apresentou uma crescente porcentagem de escores "Bravo", para ambas as cerâmicas. Comparando-se esses dados com os obtidos no baseline verificou-se uma diferença estatisticamente significante (p > 0,05)...