Effectiveness of desensitizing toothpastes in reducing tooth sensitivity after tooth bleaching: a systematic review.

OBJECTIVE: To evaluate the effectiveness of desensitizing toothpastes in reducing post-bleaching tooth sensitivity. MATERIALS AND METHODS: A systematic review of randomized clinical trials was conducted based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses checklist. Electronic searches were conducted in the PubMed/MEDLINE, Scopus, Web of Science, The Cochrane Library and Embase databases, using the following terms: (dentifrices OR toothpaste) AND (sensitive OR sensitivity OR dental sensitivity) AND (dental bleaching OR tooth bleaching OR dental whitening OR tooth whitening). RESULTS: Five studies involving 387 individuals undergoing in-office or at-home teeth bleaching were reviewed. Desensitizing toothpastes reduced sensitivity effectively after home bleaching with 22% carbamide peroxide and single-session in-office bleaching with 35% hydrogen peroxide. However, they were ineffective for home bleaching with 16% carbamide peroxide and in-office bleaching across two sessions with 35% or 38% hydrogen peroxide. CONCLUSION: Desensitizing toothpastes are effective for home bleaching with high concentration carbamide peroxide and single-session in-office bleaching with highly concentrated hydrogen peroxide, but ineffective for home bleaching with low concentration carbamide peroxide and two-session in-office bleaching with concentrated hydrogen peroxide.

Efficacy of prostheses bonding using silane incorporated to universal adhesives or applied separately: A systematic review.

Currently, the long-term success of esthetic rehabilitation with ceramics is required. Hence, professional knowledge about the most indicated dental material for each clinical situation as well as its usage protocol is essential. The aim of this systematic review of clinical and laboratorial studies was to compare the bond strength of prostheses using silane incorporated to universal adhesives or applied separately. The literature search in databases "Cochrane Library," "MEDLINE," "Web of Science," "Scopus," "LILACS," "Scielo," and "Google Scholar" was based on the keywords "Silane;" "Silanes;" "Silane coupling agent;" "Universal adhesive;" and "Universal adhesives." A total of five articles were included in this review. In general, the studies showed better results for ceramic etching with hydrofluoric acid and application of silane separately to the universal adhesive. As a conclusion, the treatment with pure silane or as an additional pretreatment with universal adhesives improved the bond strength of glass ceramics. Hence, higher shear bond strength can be achieved, resulting in treatment longevity.

Factors associated with total edentulism in the elderly and their impact on the self-perception of oral health and food.

OBJECTIVE: to identify the prevalence of and factors associated with total edentulism in the elderly Brazilian population. In addition, we sought to verify whether edentulism influences the self-perception of oral health and difficulty in eating. MATERIALS AND METHODS: This cross-sectional, population-based study used the database of the National Health Survey conducted in Brazil. The chi-square test was initially used for data analysis. Subsequently, a multivariate analysis of the Poisson multiple regression type was performed to verify the adjusted prevalence ratios. RESULTS: A total of 43,554 elderly people participated in the study, of whom 32% had completely lost their teeth. This total edentulism, based on the multivariate analysis, was associated with female gender (p < 0.001), advances age (p < 0.001), illiterate (p < 0.001), smokers (p < 0.001), and those who did not have health insurance (p < 0.001) or dental insurance (p < 0.001). Total edentulism had an impact on better self-perception of oral health (p < 0.001) and greater difficulties in eating (p = 0.001). CONCLUSION: It was concluded that total edentulism in the elderly is associated with worse socioeconomic conditions and a worse lifestyle. This condition has a negative impact on diet and positively affects self-perception of oral health.

Effect of different surface treatments on the micro tensile bond strength to dentin, biaxial flexural strength and roughness of CAD/CAM resin composite and polymer infiltrated ceramic.

OBJECTIVES: To evaluate the biaxial flexural strength (BFS), surface roughness (Ra) and micro tensile bond strength (µTBS) of two CAD/CAM materials after different surface treatments. MATERIALS AND METHODS: For µTBS, 64 human molars were used and 32 blocks of resin composite (RC-Lava Ultimate) and polymer-infiltrated ceramic (PIC -Vita Enamic). The blocks and teeth were distributed into 16 groups according to the factors "surface treatment" (HF: 10% hydrofluoric acid; APA: Al2O3 sandblasting; SC: silicate-Al2O3 sandblasting; MEP: Monobond Etch and Prime) and "thermal cycling" (TC). After cementation, the blocks were sectioned into 1 mm2 bars. Half of the specimens were thermocycled and submitted to µTBS test. For BFS, RC and PIC discs were made and distributed according to the surface treatments and after mechanical cycling, submitted to BFS test. Roughness, EDS, SEM, and Weibull analyses were also performed. Data were analyzed by (1 or 2-way) ANOVA and Tukey test (α = 0.05). RESULTS: For RC, SC and HF after TC showed significantly higher µTBS values. For PIC HF after TC showed higher µTBS than the other groups. For RC, the BFS was higher for MEP than Al2O3 and SC. For PIC, none of the surface treatments influenced BFS. CONCLUSION: The highest µTBS for RC was obtained with SC followed by silanization and for PIC, HF followed by silanization. The RC showed lower strength after Al2O3 blasting. For PIC all surface treatments resulted in similar BFS.

Effect of Adhesive Resin Application on the Durability of Adhesion to CAD/CAM Glass-Ceramics after either Hydrofluoric Acid Etching or Self-etch Primer Application.

PURPOSE: To evaluate the effect of two surface conditioning methods, namely conventional hydrofluoric acid vs self-etching primer, and the application of adhesive on the bond strength of resin cement to CAD/CAM glass-ceramics. MATERIALS AND METHODS: Blocks (N = 96) (12 x 10 x 2.5 mm) were manufactured, 24 for each tested ceramic type: lithium silicate ceramic (LS), polymer-infiltrated ceramic (PIC), leucite-reinforced feldspathic ceramic (FD), and lithium-disilicate glass-ceramic (LD). For bond strength testing, 64 blocks were randomly divided into 16 groups (4 blocks per group) according to the following factors: ceramic: 4 levels; etching: 2 levels (HFS: hydrofluoric acid + silane or Monobond Etch & Prime [MEP]); and adhesive application: 2 levels, with (signified as A) and without. Then for each group, 15 resin cement cylinders (AllCem Dual, FGM) were built up. All specimens were subjected to thermocycling (10,000 cycles) and to shear bonding strength testing (SBS) (100 kgf, 0.5 mm/min). Mean shear stresses (MPa) were statistically analyzed by three-way ANOVA, Tukey's test, and Weibull analysis. RESULTS: The mean bond strength of group PIC-HFS-A (28.45 ± 7.6 MPa) was significantly higher than that of groups LS-HFS-A (12.11 ± 2.7MPa) and FDHFSA (20.86 ± 2.0MPa). Group PIC-HFS bond strength (25.02 ± 6.5 MPa) was significantly higher only when compared to group LS-HFS (15.82 ± 4.4 MPa). The LS group presented lower SBS compared to all other groups. No significant differences were found between HFS and MEP surface treatments. CONCLUSION: Surface treatment with MEP promotes adhesion similar to that of HFS. Additional application of adhesive after the surface treatments did not improve the bond strength.

Effect of different surface treatments on the biaxial flexure strength, Weibull characteristics, roughness, and surface topography of bonded CAD/CAM silica-based ceramics.

OBJECTIVE: To investigate the influence of different surface treatments on biaxial flexure strength, roughness, and surface topography of lithium silicate/disilicate-based ceramics. METHODS: 225 discs (∅: 12 mm; 1.2 mm - ISO 6872) were made from three ceramics: IPS e.max CAD (LD - Ivoclar Vivadent), Suprinity (LSS - Vita) and Celtra Duo (LSC - Dentsply). The samples were randomly divided into 5 groups (n = 15): no treatment (C); 10% hydrofluoric acid + silane (HF); sandblasting Al2O3 + silane (SB); silicatization + silane (SC); and self-etching ceramic primer (SEP). After surface treatment, a resin cement layer was applied to the disc surface (RelyX U200, 3M ESPE), mechanical cycled (1.2 × 106 cycles, 50 N, 3.8 Hz) and submitted to biaxial flexural strength test (1 mm/min, 1000 Kgf). Roughness, EDS and SEM were also performed. Data were analyzed by one-way ANOVA, Tukey test (5%) and Weibull. RESULTS: ANOVA revealed that the "surface treatment" factor was significant for all ceramics (p < 0.05). The groups LD-HF (289.30 ± 40) LD-SEP (298. 87 ± 53.29), LSC-HF (195.51 ± 42.12), LSS-HF (269.58 ± 27.07) and LSS-SEP (207.45 ± 28.63) presented significantly higher biaxial flexure strength than respective control groups, except for the LSC-SEP (165.41 ± 33.86), which was statistically similar to the control. The Weibull modulus was significantly higher for the LD-SB, LSC-SC groups. Additionally, the LD-SB, LSC-SC and LSS-HF groups showed higher roughness compared to the other treatments. SIGNIFICANCE: HF etching followed by silanization and self-etching ceramic primer are the most suitable surface treatments for lithium silicate/disilicate-based glass-ceramics.

Effect of different surface treatments and multimode adhesive application on the Weibull characteristics, wettability, surface topography and adhesion to CAD/CAM lithium disilicate ceramic.

METHODOLOGY: This paper aims to evaluate the effect of different surface treatments on surface topography, wettability, and shear bond strength of resin cement to glass ceramic. For SBS test, 32 blocks (7x7x2 mm) of lithium disilicate were obtained and randomly divided into eight groups (four blocks per group) according to each surface treatment (HF 20 s, 60 s, 120 s + silanization/S or Scotch Bond Universal/ SBU) and the Monobond Etch & Prime - MEP application followed or not by SBU. On each treated surface ceramic block, up to four dual-curing resin cement cylinders were prepared and light-cured for 40s (N=120/n=15). The specimens were thermocycled (10,000 cycles, 5-55°C, 30 s) and the SBS test (50KgF, 0.5 mm/min) was performed. Furthermore, failure analysis, wettability, AFM, and SEM were carried out. SBS data (MPa) were analyzed using Student's t-test, two-way ANOVA, Tukey's test (5%) and Weibull's analysis. RESULTS: For HF experimental groups, two-way ANOVA presented the factors "etching time" and "bonding agent" as significant (p<0.05). After silane application, the HF groups presented similar bond strength. SBU application compromised the SBS, except for 120s etching time (HF120sS: 23.39ᵃ±6.48 MPa; HF120sSBU: 18.76ᵃ±8.81MPa). For MEP groups, SBU application did not significantly affect the results (p=0.41). The MEP group presented the highest Weibull modulus (4.08A) and they were statistically different exclusively from the HF20sSBU (0.58B). CONCLUSION: The HF 20s, 60s, 120 s followed by silane, promoted similar resin-bond strength to ceramic and the SBU application after HF or MEP did not increase the SBS.

Effect of hydrofluoric acid concentration and etching time on resin-bond strength to different glass ceramics.

The objective of this study was to evaluate the effect of the hydrofluoridric acid (HF) concentration and time of acid conditioning on bond strength of three glass ceramics to a resin cement. Thus, fifty blocks (10 mm x 5 mm x 2 mm) of each ceramic (LDCAD: IPS e.max CAD; LCAD: IPS Empress CAD and LDHP: IPS e.max Press) were made and embedded in acrylic resin. The surfaces were polished with sandpaper (#600, 800, 1000, and 1200 grits) and blocks were randomly divided into 15 groups (n = 10) according to the following factors: Concentration of HF (10% and 5%), conditioning time (20 s and 60 s) and ceramic (LDCAD, LDHP, and L). After conditioning, silane (Prosil / FGM) was applied and after 2 min, cylinders (Ø = 2 mm; h = 2 mm) of dual resin cement (AllCem / FGM) were made in the center of each block using a Teflon strip as matrix and light cured for 40 s (1,200 mW/cm2). Then, the samples were thermocycled (10,000 cycles, 5/55°C, 30s) and submitted to the shear bond test (50 KgF, 0.5 mm/min). The data (MPa) were analyzed with 3-way ANOVA and Tukey's test (5%). Failure analysis was performed using a stereomicroscope (20x) and a scanning electron microscope (SEM). ANOVA revealed that the "concentration" factor (p = 0.01) and the interaction "acid concentration X ceramic" (p = 0.009) had a significant effect, however, the "ceramic" (p = 0.897) and "conditioning time" (p = 0.260) factors did not influence the results. The LDHP10%60s (10.98 MPa)aA* group presented significantly higher bond strength than LDHP10%20s (6.57 MPa)bA, LCAD5%20s (6,90 ±3,5)aB and LDHP5%60s (5.66 ± 2,9MPa)aA* groups (Tukey). Failure analysis revealed that 100% of specimens had mixed failure. In conclusion, etching with 5% HF for 20 seconds is recommended for lithium disilicate and leucite-reinforced CAD/CAM ceramics. However, for pressed lithium disilicate ceramic, 10% HF for 60 s showed significantly higher bond strength to resin cement.

Effect of extrinsic pigmentation and surface treatments on biaxial flexure strength after cyclic loading of a translucent ZrO2 ceramic.

OBJECTIVE: To evaluate the influence of extrinsic pigmentation on the biaxial flexural strength and surface topographic of translucent Y-TZP (InCoris TZI - Sirona - USA) subjected to several surface treatments. METHODS: Sintered zirconia discs-shaped specimens (n=120) (ø:12mm; thickness:1.2mm; ISO 6872) were prepared and divided (n=15) according to various factors: "extrinsic pigmentation" (n: without; p: with) and "surface treatments" (C: control - as sintered; A: abraded with silica-coated alumina particles (30µm); G: glazed with a thin film of low-fusing porcelain glaze; GH: glazed and etched with 10% hydrofluoridric acid for 60s. Mechanical cycling (1.2×106 cycles, 200N, 3.8Hz) and flexural strength test (1mm/min - 1000kg cell) were performed. Two-way ANOVA and Tukey's were used for statistical test (α=0.05). Weibull analysis was used to evaluate the strength reliability. Samples were analyzed via (1) an optical profilometer to determine the surface roughness (Ra); (2) an X-ray diffraction (XRD) to evaluate phase transformations; and (3) a SEM equipped with an energy dispersive X-ray spectroscopy (EDX) to elucidate morphological properties and chemical compositions. RESULTS: Regardless of the surface treatment (p=0.5459) (Cn: 560.16MPa; Gn: 573.36MPa; An: 643.51MPa; GHn: 542.94MPa; Cp: 628.04MPa; Gp: 641.90MPa; Ap: 554.47MPa; GHp :602.84MPa) and extrinsic pigmentation (p=0.1280) there was no difference in the flexural strength among the experimental groups. According to the XRD analysis, phase transformations occurred in the An group (t→m) and in Ap group (t→c). Surface roughness was affected by surface treatments (An - p=0.001) and extrinsic pigmentation (Gp - p=0.001). SIGNIFICANCE: The biaxial flexural strength of the tested samples was not affected neither by surface treatments nor by pigmentation, although it can cause phase transformation and promote surface roughness.

Can low-fusing glass application affect the marginal misfit and bond strength of Y-TZP crowns?

To evaluate the effect of different surface treatments on the marginal misfit and retentive strength between Y-TZP crowns and an epoxy resin. Forty (40) epoxy resin (G10) abutments (height: 5mm, conicity: 60, finish line: large chamfer) with equal dimensions were milled and included in polyurethane to simulate the periodontal ligament. Next, 40 Y-TZP crowns (thickness: 1mm) were milled (Cerec in Lab) and randomly divided into four groups (n=10) according to the surface treatment: GS(glaze spray), GP(glaze powder/liquid), P(zirconia primer) and RS(tribochemical silica coating). The conditioned surfaces were cemented with dual self-adhesive cement, light cured and submitted to thermomechanical cycling (2x106, 100N, 4Hz, 5°/55°C). Marginal misfit was analyzed by a stereomicroscope and SEM. Retentive strength test was performed (1mm/min) until crown debonding. Glaze layer thickness was also performed to GS and GP groups. Marginal misfit data were analyzed by Kruskal Wallis and Dunn tests; one-way ANOVA and Tukey (5%) analyzed the tensile strength data. The marginal misfit of the GS (48.6±19.9µm) and GP (65.4±42.5µm) were statistically lower than the RS (96±62.9µm) and P (156±113.3µm) (p=0.001). The retentive strength of the GP (470.5±104.1N) and GS (416.8±170.2N) were similar to the P (342.1±109.7N), but statistically higher than those of the RS (208.9±110N). The GS and GP glaze layer was 11.64µm and 9.73µm respectively. Thus, glaze application promoted lower marginal discrepancy and higher retentive strength values than conventional techniques.

Bond strength durability of direct and indirect composite systems following surface conditioning for repair.

PURPOSE: This study evaluated the effect of surface conditioning methods and thermocycling on the bond strength between a resin composite and an indirect composite system in order to test the repair bond strength. MATERIALS AND METHODS: Eighteen blocks (5 x 5 x 4 mm) of indirect resin composite (Sinfony) were fabricated according to the manufacturer's instructions. The specimens were randomly assigned to one of the following two treatment conditions (9 blocks per treatment): (1) 10% hydrofluoric acid (HF) for 90s (Dentsply) + silanization, (2) silica coating with 30-im SiOx particles (CoJet) + silanization. After surface conditioning, the bonding agent was applied (Adper Single Bond) and light polymerized. The composite resin (W3D Master) was condensed and polymerized incrementally to form a block. Following storage in distilled water at 37 degrees C for 24 h, the indirect composite/resin blocks were sectioned in two axes (x and y) with a diamond disk under coolant irrigation to obtain nontrimmed specimens (sticks) with approximately 0.6 mm2 of bonding area. Twelve specimens were obtained per block (N=216, n=108 sticks). The specimens from each repaired block were again randomly divided into 2 groups and tested either after storage in water for 24 h or thermocycling (6000 cycles, 5 degrees C to 55 degrees C). The microtensile bond strength test was performed in a universal testing machine (crosshead speed: 1 mm/min). The mean bond strengths of the specimens of each block were statistically analyzed using two-way ANOVA (alpha = 0.05). RESULTS: Both surface conditioning (p = 0.0001) and storage conditions (p = 0.0001) had a significant effect on the results. After 24 h water storage, silica coating and silanization (method 2) showed significantly higher bond strength results (46.4 +/- 13.8 MPa) than that of hydrofluoric acid etching and silanization (method 1) (35.8 +/- 9.7 MPa) (p < 0.001). After thermocycling, no significant difference was found between the mean bond strengths obtained with method 1 (34.1 +/- 8.9 MPa) and method 2 (31.9 +/- 7.9 MPa) (p > 0.05). CONCLUSION: Although after 24 h of testing, silica coating and silanization performed significantly better in resin-resin repair bond strength, both HF acid gel and silica coating followed by silanization revealed comparable bond strength results after thermocycling for 6000 times.

Dental care during the COVID-19 pandemic: an integrative review / Cuidados odontológicos durante a pandemia do COVID-19: uma revisão integrativa

ABSTRACT Objective: The study and enactment of dental preventive measures, in response to the COVID-19 pandemic, are necessary to prevent cross-infections between professionals and patients. The objective of this integrative review was to identify the COVID-19 preventive practices in dentistry. Methods: The electronic search was conducted on these databases: Pubmed / Medline, Web of Science, Cochrane Library, Scopus, LILACS and Scielo, using the following descriptors and / or words: "Coronavirus disease 2019"; "Coronavirus 2019"; "Covid-19"; "2019-ncov"; "Sars-cov2"; "Dental practice"; "Dental care"; "Dentistry"; "Dental medicine" and "Oral medicine". PRISMA was used as a reference for designing it. Results: A total of 11 articles were included and the preventive measures against COVID-19 were based on guidelines from health agencies and consisted of: perform only emergency treatments; reschedule patients with suspected disease; hand washing; disinfection of surfaces with 70% alcohol; testing dental professionals for the disease; use the N95 mask; disposable lab coats, and face shields. Children, in addition to the measures mentioned above, should routinely drink a lot of water and be provided with healthy diets. No study has evaluated the efficacy and effectiveness of these measures. There is a lack of scientific evidence on the preventive protocols adopted against COVID-19 in dentistry since preventive measures are recommended by health agencies. Conclusion: Consequently, professionals are recommended to follow the guidelines by these organizations until effective and efficient preventive protocols tailored to dentistry are established.

RESUMO Objetivo: O estudo e a adoção de medidas preventivas odontológicas, em resposta à pandemia do COVID-19, são necessárias para evitar infecções cruzadas entre profissionais e pacientes. O objetivo desta revisão integrativa foi identificar as práticas preventivas do COVID-19 em odontologia. Métodos: A busca eletrônica foi realizada nas seguintes bases de dados: Pubmed / Medline, Web of Science, Cochrane Library, Scopus, LILACS e Scielo, utilizando os seguintes descritores e / ou palavras: "Coronavirus disease 2019"; "Coronavirus 2019"; "Covid-19"; "2019-ncov"; "Sars-cov2"; "Dental practice"; "Dental care"; "Dentistry"; "Dental medicine" and "Oral medicine". O PRISMA foi utilizado como referência para sua realização. Resultados: Um total de 11 estudos foram incluídos e as medidas preventivas contra COVID-19 foram baseadas em diretrizes dos órgãos de saúde e consistiram em: realizar apenas tratamentos de emergência; reagendar pacientes com suspeita de doença; lavar as mãos; desinfetar superfícies com álcool a 70%; testar profissionais de odontologia para a doença; usar a máscara N95; jalecos descartáveis e protetores faciais. As crianças, além das medidas mencionadas acima, devem rotineiramente beber muita água e receber dietas saudáveis. Nenhum estudo avaliou a eficácia e a efetividade dessas medidas preventivas. Faltam evidências científicas sobre os protocolos preventivos adotados contra o COVID-19 em odontologia, uma vez que medidas preventivas são recomendadas pelos órgãos de saúde. Conclusão: Consequentemente, recomenda-se aos profissionais que sigam essas organizações até que sejam estabelecidos protocolos preventivos eficazes e eficientes, adaptados à odontologia.

Fatores associados ao não uso da prótese total inferior e seu impacto em idosos brasileiros / Factors associated with not using the lower denture and its impact on elderly Brazilians / Factores asociados con la no utilización de la dentadura postiza inferior y su impacto en los ancianos brasiliños

Introdução:Grande parte dos idosos caracteriza a reabilitação com prótese total como satisfatória. Entretanto, algunsse mostram insatisfeitos devido a dificuldades com a adaptação, principalmente em relação a prótese total mandibular. Objetivo:Identificar a prevalência e os fatores associados ao não uso da prótese total inferior em idosos. Ademais, verificou-se o impacto do não uso dessa prótese na autopercepção de saúde bucal e na dificuldade de se alimentar. Método:Trata-se de um estudo de base populacional e transversal. Para a sua realização, foi utilizado a base de dados da última Pesquisa Nacional de Saúde realizada no Brasil. Inicialmente, o teste Qui-quadrado foi usado para a análise dos dados. Em seguida, uma análise multivariada do tipo regressão múltipla de Poisson foi realizada para o ajuste das razões de prevalência. Resultados:Participaram 4.582 idosos brasileiros, dos quais 27,1% não faziam uso da prótese total inferior. Onão uso da prótese esteve associada aos idosos mais velhos (p=0,001), aos sem instrução (p=0,001), aos que não possuem plano de saúde (p=0,019), aos que fumam (p=0,012) e aos que não realizavam higiene bucal todos os dias (p<0,001). O não uso da prótese total inferior impactou em uma pior autopercepção de saúde bucal (p=0,001) e em maiores dificuldades de se alimentar (p<0,001). Conclusões:Onão uso de prótese total inferior está associado a piores condições socioeconômicas e a um pior estilo de vida, fortemente ligado ao ato de fumar. Ademais, o não uso da prótese impacta negativamente na autopercepção de saúde bucal e na alimentação (AU).

Introduction:A large part of the elderly characterizes rehabilitation with total prosthesis as satisfactory. However, some are dissatisfied due to difficulties with adaptation, mainly in relation to total mandibular prosthesis.Objective:To identify the prevalence and factors associated with not using the lower denture in the elderly. In addition, the impact of not using this prosthesis on self-perceived oral health and the difficulty of eating was verified.Methods:This is a population-based and cross-sectional study. For its realization, the database of the last National Health Survey carried out in Brazil was used. Initially, the Chi-square test was used for data analysis. Then, a multivariate analysis using Poisson multiple regression was performed to adjust the prevalence ratios.Results:4,582 elderly Brazilians participated, of which 27.1% did not use the lower total prosthesis. Failure to use the prosthesis was associated with older elderly people (p=0.001), those without education (p=0.001), those who do not have health insurance (p=0.019), those who smoke (p=0.012) and those who they did not perform oral hygiene every day (p<0.001). Failure to use the lower denture impacted worse self-perceived oral health (p=0.001) and greater difficulties in eating (p<0.001). Conclusions:Failure to use a lower denture is associated with worse socioeconomic conditions and a worse lifestyle, strongly linked to smoking. In addition, the non-use of the prosthesis has a negative impact on self-perception of oral health and food (AU).

Introducción:Una gran parte de los ancianos caracteriza la rehabilitación con prótesis total como satisfactoria. Sin embargo, algunos están insatisfechos por dificultades de adaptación, principalmente en relación con la prótesis total mandibular.Objetivo:Identificar la prevalencia y los factoresasociados a la no utilización de la prótesis inferior en el anciano. Además, se verificó el impacto de no utilizar esta prótesis sobre la salud bucal autopercibida y la dificultad para comer. Método:Se trata de un estudio poblacional y transversal. Para su realización se utilizó la base de datos de la última Encuesta Nacional de Salud realizada en Brasil. Inicialmente, se utilizó la prueba de Chi-cuadrado para el análisis de datos. Luego, se realizó un análisis multivariado utilizando regresión múltiple de Poisson para ajustar las razones de prevalencia.Resultados:Participaron 4.582 ancianos brasileños, de los cuales el 27,1% no utilizó la prótesis total inferior. La falta de uso de la prótesis se asoció con ancianos (p=0,001), sin educación (p=0,001), sin seguro médico (p=0,019), con tabaquismo (p=0,012) y con los que no realizaban tratamiento oral. higiene todos los días (p<0,001). La no utilización de la dentadura inferior repercutió en una peor salud bucal autopercibida (p=0,001) y mayores dificultades para comer (p<0,001).Conclusiones:La no utilización de una dentadura inferior se asocia con peores condiciones socioeconómicas y un peor estilo de vida, fuertemente ligado al tabaquismo. Además, la no utilización de la prótesis tiene un impacto negativo en la autopercepción de la salud bucal y la alimentación (AU).

Impacto da multimorbidade nas condições de saúde bucal em idosos brasileiros / Impact of multimorbidity on oral health conditions in Brazilian elderly / Impacto de la multimorbilidad en lascondiciones de salud bucal en ancianos brasileños

Introdução: A ocorrência de multimorbidade, a qual corresponde ao acúmulo de doenças crônicas, é considerada um problema de saúde pública e suas consequências na saúde bucal carecem de evidências científicas em grandes populações. Objetivo: Avaliar o impacto da multimorbidade nas condições de saúde bucal em idosos brasileiros. Método: Realizou-se um estudo transversal e de base populacional, utilizando a base de dados da Pesquisa Nacional de Saúde. A presença de multimorbidade em idosos foi considerada quando o mesmo possuía um diagnóstico de duas ou mais doenças crônicas. Com relação às condições de saúde bucal, essas foram coletadas a partir das variáveis estudadas na referida pesquisa. O teste Qui-quadrado foi utilizado para a análise dos dados e em seguida as razões de prevalência foram ajustadas por meio da regressão múltipla de Poisson. Resultados: Participaram 11.697 idosos e, desses, 53,1% possuíam multimorbidade. Na análise multivariada, observou-se que a presença de multimorbidade em idosos predispôs a um relato negativo da autopercepção de saúde bucal (p=0,025), à dificuldade de se alimentar devido a problemas dentários (p0,001), a perder totalmente os dentes superiores (p0,001) e a escovar os dentes ou próteses pelo menos uma vez ao dia (p=0,025). Conclusão:Diante dos resultados, conclui-se que a maioria das condições de saúde bucal, assim como a autopercepção das mesmas apresentam-se piores na presença de multimorbidade na população idosa (AU).

Introduction:The occurrence of multimorbidity, which corresponds to the accumulation of chronic diseases, is considered a public health problem and its consequences on oral health lack scientific evidence in large populations.Objective:To evaluate the impact of multimorbidity on oral health conditions in elderly Brazilians.Methods:A cross-sectional and population-based study was carried out, using the database of the National Health Survey. The presence of multimorbidity in the elderly was considered when they had adiagnosis of two or more chronic diseases. Regarding oral health conditions, these were collected from the variables studied in the National Health Survey. The Chi-square test was used for data analysis and then the prevalence ratios were adjusted using Poisson multiple regression.Results:11,697 elderly people participated and, of these, 53.1% had multimorbidity. In the multivariate analysis, it was observed that the presence of multimorbidity in the elderly predisposed to a negative report of self-perceived oral health (p=0.025), the difficulty of eating due to dental problems (p0.001), to lose teeth completely (p0.001)and brushing teeth or dentures at least once a day (p=0.025). Conclusions:In view of the results, it is concluded that most oral health conditions, as well as their self-perception, are worse in the presence of multimorbidity in the elderly population (AU).

Introducción:La aparición de multimorbilidad, que corresponde a la acumulación de enfermedades crónicas, se considera un problema de salud pública y sus consecuencias sobre la salud bucalcarecen de evidencia científica en grandes poblaciones. Objetivo:Evaluar el impacto de la multimorbilidad en las condiciones de salud bucal en los brasileños de edad avanzada. Método:Se realizó un estudio transversal y basado en la población, utilizando la base de datos de la Encuesta Nacional de Salud. Se consideró la presencia de multimorbilidad en los ancianos cuando tenían un diagnóstico de dos o más enfermedades crónicas. En cuanto a las condiciones de salud bucal, se obtuvieron de las variables estudiadas en el Encuesta Nacional de Salud. La prueba de Chi-cuadrado se usó para el análisis de datos y luego las razones de prevalencia se ajustaron mediante regresión múltiple de Poisson. Resultados:Participaron 11.697 personas mayores y, de estos, 53.1% tenían multimorbilidad. En el análisis multivariante, se observó que la presencia de multimorbilidad en los ancianos predispone a un informe negativo de autopercepción de la salud bucal (p=0,025), la dificultad de comer debido a problemas dentales (p0,001), para perder los dientes por completo (p0,001) y cepillarse los dientes o las dentaduras postizas al menos una vez al día (p=0,025).Conclusiones:En vista de los resultados, se concluye que la mayoría de las afecciones de salud bucal, así como su autopercepción, son peores en presencia de multimorbilidad en la población de edad avanzada (AU).

Heat treatment of pre-hydrolyzed silane increases adhesion of phosphate monomer-based resin cement to glass ceramic.

This study evaluated the influence of different forms of heat treatment on a pre-hydrolyzed silane to improve the adhesion of phosphate monomer-based (MDP) resin cement to glass ceramic. Resin and feldspathic ceramic blocks (n=48, n=6 for bond test, n=2 for microscopy) were randomly divided into 6 groups and subject to surface treatments: G1: Hydrofluoric acid (HF) 9.6% for 20 s + Silane + MDP resin cement (Panavia F); G2: HF 9.6% for 20 s + Silane + Heat Treatment (oven) + Panavia F; G3: Silane + Heat Treatment (oven) + Panavia F; G4: HF 9.6% for 20 s + Silane + Heat Treatment (hot air) + Panavia F; G5: Silane + Heat Treatment (hot air) + Panavia F; G6: Silane + Panavia F. Microtensile bond strength (MTBS) test was performed using a universal testing machine (1 mm/min). After debonding, the substrate and adherent surfaces were analyzed using stereomicroscope and scanning electron microscope (SEM) to categorize the failure types. Data were analyzed statistically using two-way test ANOVA and Tukey's test (=0.05). Heat treatment of the silane containing MDP, with prior etching with HF (G2: 13.15 ± 0.89a; G4: 12.58 ± 1.03a) presented significantly higher bond strength values than the control group (G1: 9.16 ± 0.64b). The groups without prior etching (G3: 10.47 ± 0.70b; G5: 9.47 ± 0.32b) showed statistically similar bond strength values between them and the control group (G1). The silane application without prior etching and heat treatment resulted in the lowest mean bond strength (G6: 8.05 ± 0.37c). SEM analysis showed predominantly adhesive failures and EDS analysis showed common elements of spectra (Si, Na, Al, K, O, C) characterizing the microstructure of the glass-ceramic studied. Heat treatment of the pre-hydrolyzed silane containing MDP in an oven at 100 °C for 2 min or with hot air application at 50 ± 5 ºC for 1 min, was effective in increasing the bond strength values between the ceramic and resin cement containing MDP.

Can the silane heat treatment influence the bond durability between resin cements and a dental ceramic? / O tratamento térmico do silano pode influenciar na durabilidade da adesão entre cimento e cerâmica dental?

ABSTRACT Objective Evaluate the influence of silane heat treatment in bond durability between two resin cements and CAD/CAM feldspathic ceramic. Methods 40 feldspathic ceramic blocks were obtained, and were duplicated in microhybrid composite. All ceramic blocks were etched with 10% hydrofluoric acid for 20 s and received application of silane agent. The blocks were randomizedinto eight groups (n=5) according to the surface treatments and luting agents: P- Panavia F; PAg- Panavia F + Aging; HP- Heat Treatment + Panavia F; HPAg- Heat Treatment + Panavia F + Aging; R- RelyX ARC; Rag- RelyX ARC + Aging; HR- Heat Treatment + RelyX ARC; HRAg- Heat Treatment + RelyX ARC + Aging. The heat treatment was performed in furnace at 100 °C for 2 min. All blocks were cemented and cut to obtain samples with adhesive area of 1 mm2. Aging was performed with 10000 thermal cycles. The samples were subjected to microtensile bond strength test. Results The three-way ANOVA test revealed a significant interaction between cement versus heat treatment (p=0.001) and heat treatment versus thermal cycling (p=0.001) indicating that there was a change in bond strength due to surface treatment and aging. Conclusion Therefore, the heat treatment of the silane at 100 ºC for 2 minutes obtained higher values of bond strength between the resin cement and a feldspathic ceramicafter aging.

RESUMO Objetivo Avaliar a influência do tratamento térmico do silano na resistência de união entre dois cimentos resinosos e uma cerâmica feldspática CAD/CAM. Métodos Quarenta blocos cerâmicos foram duplicados em resina micro-híbrida. Todas as cerâmicas foram condicionadas com ácido fluorídrico 10% por 20 s e receberam aplicação do silano. Os blocos foram randomizados em oito grupos (n = 5): P-Panavia F; PAg- Panavia F + Envelhecimento; HP-Tratamento térmico + Panavia F;HPAg-Tratamento térmico + Panavia F + Envelhecimento; R-RelyX ARC; RAg-RelyX ARC; HR-Tratamento térmico + RelyX ARC; HRAg - Tratamento térmico + RelyX ARC + Envelhecimento. O tratamento térmico foi realizado em forno a 100 °C durante2 min. Todos os blocos foram cimentados e cortados para obter amostras para microtração. Foram feitos 10000 ciclos térmicos. As amostras foram submetidas a teste de micro-tração. Resultados O teste ANOVA revelou uma interação significativa entre cimento/tratamento térmico (p=0,001) e tratamento térmico/ciclo térmico (p=0,001). Conclusão Dessa maneira, o tratamentotérmico do silano a 100ºC por 2 minutos foi capaz de aumentar a resistência de união entre o cimento resinoso e uma cerâmica feldspática mesmo após o envelhecimento.

Effect of different surface treatments and multimode adhesive application on the Weibull characteristics, wettability, surface topography and adhesion to CAD/CAM lithium disilicate ceramic

Abstract This paper aims to evaluate the effect of different surface treatments on surface topography, wettability, and shear bond strength of resin cement to glass ceramic. Methodology: For SBS test, 32 blocks (7x7x2 mm) of lithium disilicate were obtained and randomly divided into eight groups (four blocks per group) according to each surface treatment (HF 20 s, 60 s, 120 s + silanization/S or Scotch Bond Universal/ SBU) and the Monobond Etch & Prime - MEP application followed or not by SBU. On each treated surface ceramic block, up to four dual-curing resin cement cylinders were prepared and light-cured for 40s (N=120/n=15). The specimens were thermocycled (10,000 cycles, 5-55°C, 30 s) and the SBS test (50KgF, 0.5 mm/min) was performed. Furthermore, failure analysis, wettability, AFM, and SEM were carried out. SBS data (MPa) were analyzed using Student's t-test, two-way ANOVA, Tukey's test (5%) and Weibull's analysis. Results: For HF experimental groups, two-way ANOVA presented the factors "etching time" and "bonding agent" as significant (p<0.05). After silane application, the HF groups presented similar bond strength. SBU application compromised the SBS, except for 120s etching time (HF120sS: 23.39ᵃ±6.48 MPa; HF120sSBU: 18.76ᵃ±8.81MPa). For MEP groups, SBU application did not significantly affect the results (p=0.41). The MEP group presented the highest Weibull modulus (4.08A) and they were statistically different exclusively from the HF20sSBU (0.58B). Conclusion: The HF 20s, 60s, 120 s followed by silane, promoted similar resin-bond strength to ceramic and the SBU application after HF or MEP did not increase the SBS.

Perfil epidemiológico das hepatites b e c no estado do rio grande do norte / Epidemiological profile of hepatitis Band Cin the state of Rio Grande do Norte / Perfil epidemiológico de hepatitis B y C en el estado de Rio Grande do Norte

Introdução:Considerado um grave problema de saúde pública, a Hepatite é uma doença que se destaca por ser silenciosa e nem sempre apresentar sinais e sintomas, favorecendo assim o atraso no seu diagnóstico.Objetivo:Diante de um crescimento contínuo no estado do Rio Grande do Norte (RN) de casos de Hepatite B e C, o presentetrabalho objetivouidentificar o perfil epidemiológico da população do RN diagnosticada e notificada com hepatites B e/ou C entre os anos de 2007 a 2015, segundo as regionais de saúde. Método:Trata-se de um estudo observacional, descritivo, do tipo transversal, que utilizou uma consulta ao DATASUS para a obtenção dos dados. Resultados:Verificou-se que houve predominância do sexo masculino dentre os casos de hepatite B e C, assim como a faixa etária de 20 a 39 anos, considerando-se hepatite B e 40 a 59 para a hepatite C. Ademais, a raça parda foi a predominante em ambos os tipos virais; a 7ª região de saúde foi a regional que mais possuiu notificação e houve uma maior prevalência dos casos de hepatite B e C em pessoas com menores níveis de escolaridade. Conclusões:Concluiu-se que o perfil das hepatites B e C no estado do Rio Grande do Norte tem se mostrado semelhante aos dados do Brasil, com uma alta prevalência, sugerindo assim a necessidade de se ter uma maior articulação entre os setores e departamentos responsáveis pelo registro e controle das hepatites virais do tipo B e C e a importância do gestor em saúde frente a essas situações para a realização de medidas preventivas (AU).

Introduction:Considered a serious public health problem, Hepatitis is a disease that stands out for being silent and not always showing signs and symptoms, thus favoring the delay in its diagnosis.Objective:Faced with a continuous growth in the state of Rio Grande do Norte (RN) of cases of Hepatitis B and C, the present study aimed to identify the epidemiological profile of the population of the RN diagnosed and notified with hepatitis B and / or C between the years 2007 to 2015, according to regional health.Methods:This is an observational, descriptive, cross-sectional study that used a consultation with DATASUS to obtain the data.Results:It was found that there was a male predominance among the cases of hepatitis B and C, as well as the age group of 20 to 39 years, considering hepatitis B and 40 to 59 for hepatitis C. Furthermore, the brown race was the predominant in both viral types; the 7th health region was the region with the most reports and there was a higher prevalence of cases of hepatitis B and C in people with lower levels of education.Conclusions:It was concluded that the profile of hepatitis B and C in the state of Rio Grande do Norte has shown to be similar to the data from Brazil, with a high prevalence, thus suggesting the need to have a greater articulation between the sectors and departments responsible for the registry and control of type B and C viral hepatitis and the importance of the health manager in face of these situations for carrying out preventive measures (AU).

Introducción:considerada como un grave problema de salud pública, la hepatitis es una enfermedad que destaca por ser silenciosa y no siempre muestra signos y síntomas, favoreciendo así el retraso en su diagnóstico. Objetivo:Frente aun crecimiento continuo en el estado de Rio Grande do Norte (RN) de casos de hepatitis B y C, el presente estudio tuvo como objetivo identificar el perfil epidemiológico de la población de NB diagnosticada y notificada con hepatitis B y / o C entre los años de 2007 a 2015, según la salud regional. Método:Este es un estudio observacional, descriptivo, transversal que utilizó una consulta con DATASUS para obtener los datos. Resultados:se encontró que había un predominio de hombres entre los casos de hepatitis B y C, así como el grupo de edad de 20 a 39 años, considerando la hepatitis B y 40 a 59 para la hepatitis C. Además, la raza marrón predominaba en ambos tipos virales; la séptima región de salud fue la región con más informes y hubo una mayor prevalencia de casos de hepatitis B y C en personas con niveles más bajos de educación. Conclusiones:Se concluyó que el perfil de hepatitis B y C en el estado de Rio Grande do Norte ha demostrado ser similar a los datos de Brasil, con una alta prevalencia, lo que sugiere la necesidad de una mayor articulación entre los sectores y departamentos responsables. para el registro y control de la hepatitis viral tipo B y C y la importancia del gerente de salud ante estas situaciones para llevar a cabo medidas preventivas (AU).

Different surface treatment protocols of a Y-TZP ceramic with a superficial glaze layer

Aim: evaluate the influence of etching time with hydrofluoric acid on the bond strength of a Yttrium-stabilized polycrystalline tetragonal zirconia (Y-TZP) ceramic with a superficial glaze layer and a resin cement. Methods: Y-TZP blocks were cut to obtain 40 samples. They were distributed into four groups (n = 10): control treated by sandblasting with silica-coated alumina (RS) and three glazed experimental groups with different etching times: GS20s, GS60s and GS100s. Cementation was done with a universal adhesive and a resin cement. Two cement cylinders were made in each block. After thermocycling, the shear bond test was performed. Two extra samples of each group were made to obtain profilometry, scanning electron microscopy, mapping and backscattered electron detector images. Energy dispersive spectrometry and goniometry were also performed. Results: Kruskal-Wallis and Dunn tests demonstrated bond strength differences only between the RS (22.10MPa) and the GS groups (GS20s: 8,10Mpa; GS60s: 10.49MPa; GS100s: 7.53MPa) (p = 0.001), but there was no difference among the experimental groups (p > 0.05). The contact angles were 55.33º (RS); 70.78° (GS100s); 48.20º (GS60s) and 28.73º (GS20s). ANOVA and Tukey test demonstrated similar wettability of RS to GS60s and GS100s (p > 0.05), but all the experimental groups were statistically different between them (p < 0.001). Qualitative image analysis revealed an irregular glaze distribution after etching. The thickness of the remaining glaze layer measured by profilometry was 5±1µm (GS20S), 4±1µm (GS60S) and 3±1µm (GS100s). Conclusion: The etching time of glazed zirconia did not influence the adhesive strength of the ceramic to the resin cement

Digital smile designing, pressing and stratifying ceramic lithium disilicate veneers to rehabilitate dental agenesis: a clinical report / Facetas cerâmicas de dissilicato de lítio estratificadas e prensadas para reabilitação de agenesia dental com digital smile design: relato de caso

ABSTRACT This article had the objective of reporting a case of aesthetic rehabilitation with laminated facets from the 14 to the 24 teeth made with IPS E.max Ceram ceramics (Ivoclar-Vivadent), which replaced previous unsatisfactory composite resin restorations in the anterior region. The patient had agenesis of 12 and 22 teeth, making it necessary to anatomize the anterior teeth. A digital smile design was first virtually created and then followed by a diagnostic wax-up. The following was performed in a single day: periodontal surgery using the flapless technique to achieve prosthetic space; teeth preparation; an additionalsilicone impression; and multiple provisional restorations of bis-acryl composite resins were fabricated. Fourteen days later, in the second session the ceramic veneers were etched with 5% hydrofluoric acid for 20s; they received a silane application and a silane heat treatment, then lastly an ultrasonic bath. A universal adhesive was used in combination with a light curing cement.Cementation was performed immediately following an occlusal adjustment. The patient returned for a follow-up appointment another fourteen days after the luting process, in which a further occlusal adjustment was performed, and he reported complete satisfaction with the treatment.

RESUMO Este é um relato de caso de reabilitação estética anterior com facetas laminadas dos elementos 14 ao 24 confeccionadas com a cerâmica IPSE.max Ceram (Ivoclar -Vivadent), as quais substituíram facetas de resina composta insatisfatórias dos elementos 13 ao 23. Ressalta-se que o paciente possuía agenesia dos elementos 12 e 22, tornando-se necessária a reanatomização dos dentesanteriores. Inicialmente ocorreu o planejamento digital, seguido pelo enceramento diagnóstico. Foi realizado em consulta única: cirurgia periodontal pela técnica "flapless" para conquista de espaço protético; confecção dos preparos para facetas; moldagem com silicona de adição; e confecção de múltiplos provisórios em resina bisacrilica. Na consulta de cimentação, as peças foram tratadas comácido fluorídrico 5% por 20s; silanizadas com Relyxceramic primer (3M ESPE), submetidas ao tratamento térmico; e banho ultrassônico. O sistema adesivo utilizado foi o Single Bond (3M ESPE) associado ao RelyxVenner (3M ESPE). Imediatamente a cimentação foi realizado um ajuste oclusal. Após 14 dias o paciente retornou para uma nova consulta de acompanhamento, na qual foi realizada mais um ajuste oclusal, e relatou total satisfação com o tratamento realizado.