Can the combination of proanthocyanidin and vitamin E or palm oil effectively protect enamel against in vitro erosive and abrasive challenges?

OBJECTIVES: This study aimed to assess the effect of proanthocyanidin, palm oil and vitamin E against erosive and erosive+abrasive challenges in vitro after enamel pellicle formation in situ. METHODOLOGY: Bovine enamel blocks (n=84) were obtained and divided into the following treatment groups: negative control (NC) - deionized water; positive control (PC) - SnCl2/NaF/AmF-containing solution; palm oil (PO); 2% proanthocyanidin (P2); vitamin E (VitE); 2% proanthocyanidin+palm oil (P2PO); and 2% proanthocyanidin+vitamin E (P2VitE). For 5 days, one half of the sample from each group was subjected to erosion and the other half was subjected to erosion+abrasion. The acquired enamel pellicle (AEP) was pre-formed in situ for 30 minutes. The specimens were then treated in vitro with solutions (500 µl, 30s for each group). Subsequently, the blocks were left in the oral cavity for another hour to obtain the modified AEP. The blocks were immersed in 0.5% citric acid (pH=2.5) for 90s, 4×/day. AEP formation and treatment were carried out before the first and third erosive challenges, and after these challenges, abrasive cycles (15s) were performed on half of the samples. Enamel wear was quantified by profilometry and data were analyzed by two-way ANOVA and Tukey's test (p<0.05). RESULTS: All groups showed higher wear when exposed to erosion+abrasion than when exposed to erosion alone (p=0.0001). PO, P2VitE, P2, and P2PO showed enamel wear similar to the PC group, but only PC, PO and P2VitE differed from the NC group. The other groups behaved similarly to NC. CONCLUSION: It was concluded that the combination of proanthocyanidin and vitamin E was effective in reducing wear in the face of in vitro erosive and erosive+abrasive challenges.

What can impact on the presence of carious lesions in first permanent molars? Revisiting the association between MIH and caries.

OBJECTIVE: Assess whether the independent variables (IV) such as number of MIH-affected molars, MIH severity, past caries experience, visible plaque index (VPI), gingival bleeding index (GBI), age, and gender affect the presence of caries lesion (DMF_s) in first permanent molars, considering or not atypical restoration in MIH-affected molars as a previous caries lesion. METHODS: A sample of 476 schoolchildren, aged 6-10 years, were evaluated for MIH and caries diagnosis, using the Severity Scoring System (MIH-SSS) and the International Caries Detection and Assessment System (ICDAS), respectively. From the ICDAS, the DF-s/ D-s and df-s were calculated. The Zero-inflated Negative Binomial Regression was used to evaluate the impact of the IV on the dependent variable, considering or not the restorative component in MIH-affected molars. RESULTS: When the presence of caries was evaluated with the restorative component, age, MIH severity and past caries experience had a significant impact on the dependent variable (R2 = 0.176). Without the restorative component in MIH-affected molars, only age and past caries experience were statistically significant (R2 = 0.167). CONCLUSION: Since in the case of MIH teeth restoration may be attributed to post-eruptive breakdown rather than previous caries lesions, in the present study MIH did not influence the presence of caries lesions in the MIH-affected molars showing that restoration is not an adequate parameter for measuring the historical occurrence of caries. CLINICAL RELEVANCE: The first permanent molars may not necessarily be at an increased risk of caries due to MIH if the etiological factors for caries development are effectively managed.

Practical training using BEWE aimed at improving the diagnosis ability of erosive tooth wear for dental students-A randomized trial.

INTRODUCTION: Erosive tooth wear (ETW) has been gaining attention due to its high prevalence. However, ETW clinical diagnosis is difficult and may go unnoticed by many professionals. The present study aimed to develop, implement and evaluate a theoretical-practical training using active methodologies in the development of undergraduate students' skills for the diagnosis of ETW compared to the traditional teaching method. MATERIALS AND METHODS: This randomized controlled study involved two parallel groups: control group (n = 22), with learning based only on theoretical content and test group (n = 24), learning by theoretical-practical activity mediated by monitors/tutors. The theoretical class covered the current concepts of ETW, aetiology, diagnosis, use of the BEWE index, prevention and treatment. The practical training included exercises and discussions based on the diagnosis using BEWE scores of a collection of images and extracted teeth. To evaluate the efficacy of the teaching-learning methods, a theoretical multiple-choice questionnaire and a practical test using images and extracted teeth were applied. The outcome was the number of correct answers. Groups were compared by Mann-Whitney (theoretical knowledge) and T tests (practical ability in diagnosis) (p < .05). RESULTS: There was no significant difference between groups in the theoretical evaluation (p = .866). The test group showed higher ability to diagnose ETW lesions compared to the control group in the practical tests (p = .001). The performance of ETW diagnosis was similar when images were used in comparison to extracted teeth (p = .570). CONCLUSION: The practical activity associated with theoretical classes can be a promising strategy to improve the development of undergraduate students' skills in the diagnosis of ETW.

Are S-PRG composites able to resist against erosive and abrasive challenges and protect surrounding enamel in situ?

OBJECTIVES: This study evaluated the resistance of S-PRG (Surface Pre-Reacted Glass-ionomer) composites and other restorative materials against erosive and abrasive challenges and their protective effect on enamel adjacent to the restorations. MATERIALS AND METHODS: Bovine enamel blocks were prepared and randomized into 12 groups, including 6 types of material, each of them subjected to erosion_e or erosion+abrasion_ea: Beautifil II (S-PRG); Beautifil Bulk Restorative (S-PRG); Filtek Z250 XT; Filtek Bulk Fill; EQUIA Forte; Riva Light Cure. Cavities were prepared in the middle of enamel blocks and restored with the materials. Initial profiling measurement was performed on the material and on adjacent enamel (100, 200, 300, 600 and 700 µm from the restoration margin). Palatal intraoral appliances with the restored enamel blocks were used by the volunteers (n = 10). During 5 days appliances were immersed in 2.5 % citric acid for 2 min; 6 × /day (erosion_e). For ea condition, blocks were brushed for 1 min after each acid immersion. Final profile assessment was performed. Data were analysed by two and three way ANOVA followed by Tukey's test (p < 0.05). RESULTS: Material wear: Riva Light Cure showed the highest wear followed by EQUIA Forte and then all resin composites, including the ones with S-PRG (p = 0.000). Enamel wear: there was significant interaction among type of restorative material, wear condition and distance (p = 0.014), enamel around materials showed similar wear (p = 0.983) and the enamel subjected to ea exhibited highest wear (p = 0.000). CONCLUSION: SPRG based composites showed resistance against erosive and abrasive challenges but were not able to protect enamel adjacent to the restorations. CLINICAL SIGNIFICANCE: S-PRG composites exhibit resistance to material wear comparable to resin composites. However, they have shown an inability to effectively protect the adjacent enamel under in situ erosive-abrasive conditions, despite the presence of mineral-loss-preventing ions surrounding materials.

Comparison between two molar incisor hypomineralization detection criteria in epidemiological surveys.

BACKGROUND: There is no consensus on which molar incisor hypomineralization (MIH) indices are more suitable for epidemiological surveys. AIM: To compare the operational aspects and diagnostic ability of the MIH index (simplified/MIH_s and extended/MIH_e) with the MIH-Severity Scoring System (MIH-SSS) in classifying and diagnosing MIH. DESIGN: This cross-sectional study assessed the indices in a homogeneous group of 680 6- to 10-year-old schoolchildren in Bauru, Brazil, who had at least one first permanent molar, ensuring consistent conditions. Followed by toothbrushing, the children seated on school chairs were examined by the two calibrated researchers under artificial lighting, using mouth mirror and WHO probe, and chronometer recording the duration of examinations. RESULTS: The prevalence of MIH was 24.7%. The most common characteristic of MIH was demarcated opacity, with a prevalence of 81.7% and 85.45% according to the MIH_s and the MIH-SSS, respectively. A positive association was observed among the MIH_s, the MIH_e, and the MIH-SSS (chi-squared test; p < .01). The MIH-SSS demonstrated a shorter average application time than both versions of the MIH index (ANOVA/Tukey; p < .05). Additionally, fluorosis was found to be the most prevalent among other developmental defects of enamel, with a prevalence of 38.38%. CONCLUSION: All systems effectively diagnosed MIH and its characteristics.

Acquired pellicle engineering with the association of cystatin and vitamin E against enamel erosion.

OBJECTIVE: Evaluate CaneCPI-5 associated with Vitamin E in acquired enamel pellicle (AEP) engineering to prevent dental erosion. METHODS: 180 human enamel specimens were divided into 12 groups and treated with the following solutions: Cane+VitT and Cane+VitS- CaneCPI-5 + Vit E; Vit+CaneT and Vit+CaneS- Vit E + CaneCPI-5; VitT and VitS- Vit E; CaneT and CaneS- CaneCPI-5; ControlT and ControlS - AmF/NaF/SnCl2; WaterT and WaterS- Deionized water. Groups' name followed by "T" were first treated (200 µl; 2 min) and then incubated in human saliva (200 µl; 1 h) to form the AEP. For groups followed by "S", the AEP was formed and then treatment was applied. The erosive challenge consisted of immersion in 1% citric acid (1 min, 1x/day, for 3 days). The percentage of superficial hardness loss (%SHL) and the relative surface reflection intensity (%SRI) were subjected to normality and homogeneity tests, Shapiro-Wilk and Levene tests, respectively. Subsequently, the data were analyzed using two-way ANOVA, Tukey's test and Pearson's correlation (p < 0.005). RESULTS: For%SHL and%SRI, water controls showed significantly lower protective capacity. Cane+VitT, Cane+VitS, and Vit+CaneS presented the lowest%SHL, and VitT and VitS did not differ from Vit+CaneT, but they were different from the other groups (p = 0.002). The greatest%SRI was found for the Cane+VitT, Vit+CaneT, VitT, Cane+VitS, Vit+CaneS, and VitS groups, which did not significantly differ. CaneT and ControlT, showed similar reflections compared to CaneS and ControlS. CONCLUSION: CaneCPI-5 and Vitamin E demonstrated a synergistic protective effect against initial erosion. CLINICAL SIGNIFICANCE: The results open up new possibilities for preventive approaches against erosion through the acquired pellicle engineering, with the combination of CaneCPI-5 and Vitamin E, which demonstrated to be more effective than commercial stannous mouthwash. Further research is warranted to explore the potential of this combination in diverse clinical settings.

Business performance management in university hospitals: a diagnosis in Brazilian institutions / Evaluación del desempeño empresarial en hospitales universitarios: un diagnóstico en las instituciones brasileñas

ABSTRACT Objectives To investigate whether business performance management practices are used by Brazilian federal university hospitals, and if so, to determine which practices are used and explore characteristics that may be related to their adoption. Method Descriptive ex post facto research on the effects of the studied variables in relation to the technical procedures. Secondary data and survey resources were used. Results Four hospitals use practices to assess business performance. Three of them stated that they use two different types of practices and that 75 % of university hospitals with at least one business performance management practice also have a strategic plan that includes vision, mission, objectives and long-term operational plans. Among the hospitals that do not use business performance management practices, 55.6 % claim to have strategic planning composed at least of mission, vision and long-term objectives. However, they stated that the entity has no plans to adopt any method. Conclusions This diagnosis intends to draw the attention of managers and other actors in the field of public health on the possibilities offered by performance evaluation systems to promote administrative improvements in a complex internal scenario with a need for rationalization of hospital costs in order to direct these institutions towards achieving their social mission.(AU)

RESUMEN Objetivo Investigar si la evaluación del desempeño empresarial es una práctica utilizada por los hospitales federales brasileños, y en caso que haya instituciones que utilicen esta herramienta, verificar cuales prácticas son utilizadas e investigar las posibles características que permiten adoptar las mismas. Método El estudio utilizó la investigación descriptiva, siendo ex post facto en cuanto a los efectos en las variables estudiadas, y con relación a los procedimientos técnicos, se utilizaron datos secundarios y recursos de encuesta. Resultados Los resultados muestran que cuatro hospitales utilizan prácticas sobre la evaluación del desempeño empresarial; tres de ellos declararon que utilizan dos tipos de prácticas diferentes y que el 75 % de los hospitales universitarios que tienen al menos una práctica de evaluación del desempeño empresarial, también tienen un plan estratégico con visión, misión e objetivos y planes operativos a largo plazo. Entre los hospitales que no tienen prácticas sobre la evaluación del desempeño empresarial, el 55,6 % afirman tener una planificación estratégica compuesta al menos de misión, visión y objetivos a largo plazo. Sin embargo, declararon que la entidad no tiene planes de adoptar ningún método elencado. Conclusiones Este diagnóstico pretende llamar la atención a la gerencia y a los funcionarios del campo de la salud pública, sobre las posibilidades que ofrecen los sistemas de evaluación del desempeño de las entidades, para promover mejoras administrativas en un escenario interno complejo, así como la continua necesidad de racionalización de los costos hospitalarios, de forma tal que conduzca estas instituciones a alcanzar su misión social.(AU)

Business performance management in university hospitals: a diagnosis in Brazilian institutions.

OBJECTIVES: To investigate whether business performance management practices are used by Brazilian federal university hospitals, and if so, to determine which practices are used and explore characteristics that may be related to their adoption. METHOD: Descriptive ex post facto research on the effects of the studied variables in relation to the technical procedures. Secondary data and survey resources were used. RESULTS: Four hospitals use practices to assess business performance. Three of them stated that they use two different types of practices and that 75 % of university hospitals with at least one business performance management practice also have a strategic plan that includes vision, mission, objectives and long-term operational plans. Among the hospitals that do not use business performance management practices, 55.6 % claim to have strategic planning composed at least of mission, vision and long-term objectives. However, they stated that the entity has no plans to adopt any method. CONCLUSIONS: This diagnosis intends to draw the attention of managers and other actors in the field of public health on the possibilities offered by performance evaluation systems to promote administrative improvements in a complex internal scenario with a need for rationalization of hospital costs in order to direct these institutions towards achieving their social mission.

Knowledge about emergency contraception among women referred for treatment at a university hospital in Brazil

BACKGROUND: Emergency contraception (EC) has many important indications. The aim of the study was to investigate the prevalence of use and knowledge about the correct use of EC among women referred for treatment at a university hospital in Brazil. AIM: The aim of the study was to investigate the prevalence of use and knowledge about the correct use of EC among women referred for treatment at a university hospital in Brazil. METHODS: Study Design: Cross-sectional study. Settings: The study was conducted with patients admitted to the Hospital de Clínicas de Porto Alegre (HCPA) from 2009 to 2010. Patients: Sexually active women aged 18 to 50 years. Interventions: Patients answered a questionnaire on the use of and knowledge about EC. Main Outcome Measures: Primary outcome: prevalence of knowledge about correct EC use. Secondary outcome: prevalence of EC use. RESULTS: 134 patients participated in this study. 61.2% of women reported regular use of birth control pills, 18.7% of condoms, 9.0% of other methods, 3.0% of intrauterine device, and 8.1% used no contraceptive method. As for EC, 86.5% of interviewees reported having knowledge about the method, and 43.1% of these reported knowing how to use EC. However, only 12.0% of interviewees correctly reported how EC should be used. The prevalence of EC use in our sample was 19.4%. CONCLUSIONS: Although most interviewees reported having some knowledge about EC, only a small number were able to accurately describe its proper use.

Taxas de infecção relacionadas a partos cesáreos e normais no Hospital de Clínicas de Porto Alegre / Rates of infection related to cesarean and vaginal delivery at HCPA

Introdução: Indicadores de gestão hospitalar são utilizados para mensurar quantitativamente a qualidade da gestão e proporcionam informações fundamentais para o seu controle. Esse estudo compara a taxa de infecção pós-parto relacionada aos partos cesáreo e vaginal. Embora o risco de infecção puerperal esteja presente em ambos os procedimentos, o risco é maior após o parto por cesariana, devido à natureza invasiva do procedimento. Objetivo: Comparar a taxa de infecção puerperal relacionada ao parto cesáreo com a taxa relacionada ao parto normal. Métodos: Estudo de coorte retrospectivo, de caráter observacional, cujos dados foram coletados no Sistema de Indicadores de Gestão do Hospital de Clínicas de Porto Alegre, abrangendo o período de janeiro de 2004 a dezembro de 2010. Resultados: A taxa de cesariana no Hospital de Clínicas de Porto Alegre foi de 32,55% durante o período investigado. Entre os nascimentos, durante o mesmo período, a taxa de infecção após partos por cesariana foi de 2,8%, e de 0,8% após partos vaginais (p < 0,001). Conclusão: A taxa de infecção associada à cesariana é maior do que a relacionada aos partos normais. A taxa de infecção de cesarianas vem diminuindo desde 2004, após esse hospital ter adotado como rotina a administração de antibiótico profilaxia durante a indução anestésica.

Introduction: Hospital management indicators are used to measure service quality and provide important information for quality control. This study compares the postpartum infection rate following cesarean and vaginal delivery. Although risk of infection is present in both procedures, the risk is higher after cesarean delivery because of the invasive nature of the procedure. Objective: To compare the rate of puerperal infection after cesarean and vaginal delivery. Methods: The data for this retrospective cohort study were collected from the Management Indicator System (IG) of the Hospital de Clínicas de Porto Alegre (HCPA), covering the period from January 2004 to December 2010. Results: The rate of cesarean delivery at HCPA was 32.55% during the period investigated. Among births at HCPA during the same period, the infection rate after cesarean delivery and vaginal delivery was 2.8% and 0.8%, respectively (p<0.001). Conclusion: The rate of infection related to cesarean deliveries is higher than that related to vaginal deliveries. The infection rate of cesarean delivery has been declining since 2004 after the hospital adopted the routine administration of antibiotic prophylaxis during induction.

Acute toxicity test of agricultural pesticides on silver catfish (Rhamdia quelen) fingerlings / Teste de toxicidade aguda de pesticidas agrícolas em alevinos de jundiás (Rhamdia quelen)

Toxicity risks of agricultural pesticides to fishes are pivotal. Currently, many questions remain unsolved regarding to the toxicity of commonly used pesticides to silver catfish (Rhamdia quelen), a South American catfish. The present studies have been designed to investigate the acute toxicity and the lethal concentration (LC50) of four herbicides, two fungicides and two insecticides to silver catfish fingerlings. All experiments were carried out in triplicates, in a static bioassay system, using commercially available pesticides. The data was analyzed through the Trimmed Spearman-Karber method available from the Environmental Protection Agency. The 96hLC50 and 95 percent lower and upper confidence limits, respectively, for the following pesticides were determined: glyphosate (7.3mg L-1; 6.5-8.3), atrazine (10.2mg L-1; 9.1-11.5), atrazine+simazine (10.5mg L-1; 8.9-12.4), mesotrione (532.0mg L-1; 476.5-594), tebuconazole (5.3mg L-1; 4.9-5.7), methylparathion (4.8mg L-1; 4.3-5.3), strobulurin and triazol (9.9mg L-1; 8.7-11.2). Diflubenzuron was also tested and caused no fish mortality up to 1g L-1. The toxic concentration of these pesticides to silver catfish fingerlings fell above the concentration used for application in the field and, except following accidental application or misplacing of empty recipients, it should not cause fish mortality. Nonetheless, the data obtained will be useful to study the long-term effect of these products on the hematological, biochemical, hormonal and immunological parameters of silver catfish and related fish species in South Brazil.

A toxicidade dos defensivos agrícolas para peixes é um importante fator de risco a ser avaliado. Até o presente, muitos aspectos da toxicidade dos principais defensivos agrícolas para jundiá (Rhamdia quelen) ainda não foram investigados. No presente estudo, a toxicidade aguda e a concentração letal (CL50) de quatro herbicidas, dois fungicidas e dois inseticidas foram determinadas para alevinos de jundiás. Todos os experimentos foram conduzidos em triplicatas, utilizando-se um sistema de bioensaio estático e pesticidas comercializados localmente. Os dados foram analisados usando-se o método de Trimmed Spearman-Karber disponível na Agência de Proteção Ambiental (EUA). A CL50-96hr e os limites inferiores e superiores, com 95 por cento de confiança, respectivamente, para os seguintes produtos, foram: glifosato (7,3mg/L; 6,5 - 8,3), atrazina (10,2mg L-1; 9,1-11,5), atrazina+simazina (10,5mg L-1; 8,9-12,4), mesotrione (532,0mg L-1; 476,5-594), tebuconazol (5,3mg L-1; 4,9-5,7), metilparation (4,8mg L-1; 4,3-5,3), estrobilurina e triazol (9,9mg L-1; 8,7-11,2). O diflubenzuron também foi testado, mas não causou mortalidade nos alevinos até a concentração de 1g/L. A toxicidade dos produtos testados ficou acima das concentrações utilizadas para aplicação nas lavouras e, exceto nos casos de aplicação acidental ou despejo inadequado dos recipientes, esses produtos não poderiam causar morte de jundiás. No entanto, os dados obtidos nesses experimentos serão úteis para estudar o efeito, a longo prazo (intoxicação crônica), desses produtos, nos parâmetros hematológicos, bioquímicos, hormonais e imunológicos do jundiá e de espécies similares presentes no Sul do Brasil.

Neoplasias musculares do esôfago e estômago / Muscular neoplasms of the esophagus and stomach

Os autores apresentam a experiência adquirida em sete tumores musculares localizados no esôfago e no estômago. A disfagia, a hemorragia e a obstruçäo gástrica foram os sintomas mais freqüentes, embora dois pacientes fossem assintomáticos. Ressultam a importância do diagnóstico histológico pré-operatório através da biópsia endoscópica a fim de determinar a conduta operatória mais adequada. A enucleaçäo ou ressecçäo foi empregada como tratamento definitivo nos casos operados. As complicaçöes, no pós-operatório, foram broncopneumonia e íleo prolongado em dois casos. Näo houve óbitos nesta série