Evaluation of Failed Implants by Metallographic and Energy Dispersive X-ray Analysis.

OBJECTIVE: To evaluate the microscopic structure and chemical composition of titanium dental implants removed from patients with implant failure. MATERIALS AND METHODS: Thirty-eight dental implants removed from 29 patients between January 2012 and September 2014 were studied by metallographic analysis, and 7 of these implants were also studied by energy-dispersive x-ray (EDX) analysis. Medical records of these patients were examined. RESULTS: Dental implants were removed in a median of 54.6 ± 88.1 weeks after insertion. The lack of osseointegration without symptomatology or signs of infection was the main reason for implant failure (55.17%). Seventeen patients presented implant failure in the maxilla and 12 patients in the mandible. Metallographic analysis revealed that all the dental implants were manufactured from commercially pure titanium, presenting microscopic uniform appearance, with no "alpha case". The implants studied by EDX analysis presented between 99.85% and 99.87% of titanium and 0.13% and 0.15% of iron by mass. All the implants evaluated were within the ASTM specifications in both analyses. CONCLUSION: There was no relationship between dental implant failure and the microscopic structure and chemical composition of these devices.

HIV seroprevalence and high-risk sexual behavior among female sex workers in Central Brazil.

Female sex workers (FSWs) are considered a high-risk group for human immunodeficiency virus (HIV) infection due to their social vulnerability and factors associated with their work. We estimated the prevalence of HIV, and identified viral subtypes and risk factors among FSWs. A cross-sectional study using respondent-driven sampling (RDS) method was conducted among 402 FSWs in Campo Grande city, Brazil, from 2009 to 2011. Participants were interviewed using a standardized questionnaire about sociodemograpic characteristics and risk behavior. Blood samples were collected for serological testing of HIV. Of the 402 FSWs, median age and age of initiating sex work were 25 years (Interquartile range [IQR]: 9) and 20 years (IQR: 6), respectively. The majority reported use of alcohol (88.5%), had 5-9 years (median: 9; IQR: 3) of schooling (54.5%), 68.6% had tattoos/body piercings, and 45.1% had more than seven clients per week (median: 7; IQR: 10). Only 32.9% of FSW reported using a condom with nonpaying partners in the last sexual contact. Prevalence of HIV infection was 1.0% (95% CI: 0.1-2.6%). Genotyping for HIV-1 performed on three samples detected subtypes B, C, and F1. Sex work in the Midwestern region of Brazil is characterized by reduced education, large numbers of clients per week, and inconsistent condom use, mainly with nonpaying partners. Although prevalence of HIV infection is currently low, elevated levels of high-risk sexual behavior confirm a need to implement prevention measures. Specific interventions targeting FSWs must emphasize the risk associated with both clients and nonpaying partners while providing knowledge about HIV prevention.

Reasons for disengagement from antiretroviral care in the era of "Treat All" in low- or middle-income countries: a systematic review.

INTRODUCTION: Disengagement from antiretroviral therapy (ART) care is an important reason why people living with HIV do not achieve viral load suppression become unwell. METHODS: We searched two databases and conference abstracts from January 2015 to December 2022 for studies which reported reasons for disengagement from ART care. We included quantitative (mainly surveys) and qualitative (in-depth interviews or focus groups) studies conducted after "treat all" or "Option B+" policy adoption. We used an inductive approach to categorize reasons: we report how often reasons were reported in studies and developed a conceptual framework for reasons. RESULTS: We identified 21 studies which reported reasons for disengaging from ART care in the "Treat All" era, mostly in African countries: six studies in the general population of persons living with HIV, nine in pregnant or postpartum women and six in selected populations (one each in people who use drugs, isolated indigenous communities, men, women, adolescents and men who have sex with men). Reasons reported were: side effects or other antiretroviral tablet issues (15 studies); lack of perceived benefit of ART (13 studies); psychological, mental health or drug use (13 studies); concerns about stigma or confidentiality (14 studies); lack of social or family support (12 studies); socio-economic reasons (16 studies); health facility-related reasons (11 studies); and acute proximal events such as unexpected mobility (12 studies). The most common reasons for disengagement were unexpected events, socio-economic reasons, ART side effects or lack of perceived benefit of ART. Conceptually, studies described underlying vulnerability factors (individual, interpersonal, structural and healthcare) but that often unexpected proximal events (e.g. unanticipated mobility) acted as the trigger for disengagement to occur. DISCUSSION: People disengage from ART care for individual, interpersonal, structural and healthcare reasons, and these reasons overlap and interact with each other. While HIV programmes cannot predict and address all events that may lead to disengagement, an approach that recognizes that such shocks will happen could help. CONCLUSIONS: Health services should focus on ways to encourage clients to engage with care by making ART services welcoming, person-centred and more flexible alongside offering adherence interventions, such as counselling and peer support.

Differences in risky sexual behaviors and HIV prevalence between men who have sex with men and transgender women in the Midwest Brazil.

Men who have sex with men (MSM) and transgender women (TW) are disproportionally affected by HIV infection. This cross-sectional study evaluated the HIV-1/2 prevalence, risk factors and HIV molecular features of MSM and TW from Midwest Brazil. Four hundred and thirty participants (278 MSM and 152 TW) from Mato Grosso do Sul, Brazil, were interviewed and tested for HIV-1/2 infection between November 2011 and September 2013. Participants who were assigned male at birth, older than 18 years old and self-declared as MSM or TW were recruited from LGBT+ associations, as well as public (parks, square, streets, etc) and private [nightclubs, saunas, brothels, etc] places. The prevalence of HIV-1 was 14.4% (9.0% among MSM and 24% among TW; p<0.001). The factor independently associated with HIV-1 infection among MSM was being 30 years-old or older. Among TW, having suffered sexual coercion, lifetime syphilis infection and hepatitis C virus exposure were associated with HIV-1 infection. Phylogenetic analyses classified 65% sequences as subtype B and 35% as possible recombinants. All but one recombinant sample were from TW individuals. High HIV-1 prevalences were observed in both groups, highlighting the urgent need to devise specific HIV interventions targeting these key populations. Notably, TWs are more vulnerable to HIV infection, which was associated with sexual violence and co-infection with other STIs. With regard to MSM, being 30 years old or older was significanty associated to HIV, reinforcing the idea that MSM are less exposed [or exposed later] to STIs than TWs, although MSM are clearly more vulnerable than the general population.

Advanced HIV disease and health-related suffering-exploring the unmet need of palliative care.

With more than 38 million people living with HIV worldwide, the scale-up of antiretroviral therapy ensures nearly 28 million of them receive regular treatment. However, a substantial number of deaths still occur every year from AIDS-related complications, with approximately 680 000 deaths in 2021. Of the estimated 56·8 million people globally in need of palliative care in 2020, only 7 million can access services. Providing palliative care services can help alleviate health-related suffering, such as pain and disease-related symptoms, and improve wellbeing. This Viewpoint discusses the unrealised potential of palliative care in individuals with advanced HIV disease. Key areas of training for health-care workers include appropriate sensitisation, training in palliative care, and effective communication. Advance care planning supports both the individual and their family and is therefore of crucial importance. Integration of palliative care in HIV programmes is needed to address health-related suffering, particularly for advanced HIV disease.

High vertical HIV transmission rate in the Midwest region of Brazil.

OBJECTIVES: To estimate vertical HIV transmission rate in a capital city of the Midwest region of Brazil and describe the factors related to transmission. METHODS: A descriptive epidemiological study based on the analysis of secondary data from the Notifiable Diseases Information System (SINAN). The analysis considered all HIV-infected pregnant women with delivery in Campo Grande-MS in the years 2007-2013 and their HIV-exposed infants. RESULTS: A total of 218 births of 176 HIV-infected pregnant women were identified during the study period, of which 187 infants were exposed and uninfected, 19 seroconverted, and 12 were still inconclusive in July 2015. Therefore, the overall vertical HIV transmission rate in the period was 8.7%. Most (71.6%) of HIV-infected pregnant women were less than 30 years at delivery, housewives (63.6%) and studied up to primary level (61.9%). Prenatal information was described in 75.3% of the notification forms and approximately 80% of pregnant women received antiretroviral prophylaxis. Among infants, 86.2% received prophylaxis, but little more than half received it during the whole period recommended by the Brazilian Ministry of Health. Among the exposed children, 11.3% were breastfed. CONCLUSION: The vertical HIV transmission rate has increased over the years and the recommended interventions have not been fully adopted. HIV-infected pregnant women need adequate prophylactic measures in prenatal, intrapartum and postpartum, requiring greater integration among health professionals.

Transitioning through AIDS epidemics - gender and temporality.

OBJECTIVE: To understand the evolution of AIDS over time in Mato Grosso do Sul, Brazil, using incidence, lethality, and mortality coefficients. METHODS: A descriptive epidemiological study based on time series analysis of secondary data from the Notifiable Diseases Information System reported between 1985 and 2012. RESULTS: The prevalence of AIDS was higher among men, with evidence of feminization during the first 14 years of the epidemic. There was no statistically significant sex difference in AIDS lethality. Women were 1.3 times more likely to survive than men. CONCLUSIONS: Gender differences must be considered when designing new HIV/AIDS prevention strategies.

Pertussis in the central-west region of Brazil: one decade study.

In many parts of the world, numerous outbreaks of pertussis have been described despite high vaccination coverage. In this article we report the epidemiological characteristics of pertussis in Brazil using a Surveillance Worksheet. Secondary data of pertussis case investigations reported from January 1999 to December 2008 recorded in the Information System for Notifiable Diseases (SINAN) and the Central Laboratory for Public Health (LACEN-MS) were utilized. The total of 561 suspected cases were reported and 238 (42.4%) of these were confirmed, mainly in children under six months (61.8%) and with incomplete immunization (56.3%). Two outbreaks were detected. Mortality rate ranged from 2.56% to 11.11%. The occurrence of outbreaks and the poor performance of cultures for confirming diagnosis are problems which need to be addressed. High vaccination coverage is certainly a good strategy to reduce the number of cases and to reduce the impact of the disease in children younger than six months.

High vertical HIV transmission rate in the Midwest region of Brazil

ABSTRACT Objectives To estimate vertical HIV transmission rate in a capital city of the Midwest region of Brazil and describe the factors related to transmission. Methods A descriptive epidemiological study based on the analysis of secondary data from the Notifiable Diseases Information System (SINAN). The analysis considered all HIV-infected pregnant women with delivery in Campo Grande-MS in the years 2007-2013 and their HIV-exposed infants. Results A total of 218 births of 176 HIV-infected pregnant women were identified during the study period, of which 187 infants were exposed and uninfected, 19 seroconverted, and 12 were still inconclusive in July 2015. Therefore, the overall vertical HIV transmission rate in the period was 8.7%. Most (71.6%) of HIV-infected pregnant women were less than 30 years at delivery, housewives (63.6%) and studied up to primary level (61.9%). Prenatal information was described in 75.3% of the notification forms and approximately 80% of pregnant women received antiretroviral prophylaxis. Among infants, 86.2% received prophylaxis, but little more than half received it during the whole period recommended by the Brazilian Ministry of Health. Among the exposed children, 11.3% were breastfed. Conclusion The vertical HIV transmission rate has increased over the years and the recommended interventions have not been fully adopted. HIV-infected pregnant women need adequate prophylactic measures in prenatal, intrapartum and postpartum, requiring greater integration among health professionals.

Hepatitis C virus infection among pregnant women in Central-Western Brazil, 2005-2007.

The study was aimed at estimating the prevalence of infection with and the genotype of hepatitis C virus (HCV), and to determine the extent of underreporting of HCV cases. A total of 115,386 pregnant women seen by the Program for Protection of Pregnancy [Programa Estadual de Proteção à Gestante] of the state of Mato Grosso do Sul, Central-Western Brazil, were tested for anti-HCV antibodies between 2005 and 2007. Prevalence of HCV infection was 1.07 cases per thousand. Positive samples were tested for HCV RNA and genotyped. Genotype 1 was detected in 73% of samples, genotype 3 in 24.3%, and genotype 2 in 2.7%. Underreporting of hepatitis C cases was 35.5%.

Pertussis in the central-west region of Brazil: one decade study

In many parts of the world, numerous outbreaks of pertussis have been described despite high vaccination coverage. In this article we report the epidemiological characteristics of pertussis in Brazil using a Surveillance Worksheet. Secondary data of pertussis case investigations reported from January 1999 to December 2008 recorded in the Information System for Notifiable Diseases (SINAN) and the Central Laboratory for Public Health (LACEN-MS) were utilized. The total of 561 suspected cases were reported and 238 (42.4%) of these were confirmed, mainly in children under six months (61.8%) and with incomplete immunization (56.3%). Two outbreaks were detected. Mortality rate ranged from 2.56% to 11.11%. The occurrence of outbreaks and the poor performance of cultures for confirming diagnosis are problems which need to be addressed. High vaccination coverage is certainly a good strategy to reduce the number of cases and to reduce the impact of the disease in children younger than six months.

Infecção pelo vírus da hepatite C em gestantes em Mato Grosso do Sul, 2005-2007 / Hepatitis C virus infection among pregnant women in Central-Western Brazil, 2005-2007 / Infección por el virus de la hepatitis C en gestantes en Mato Grosso do Sul, Centro-Oeste de Brasil, 2005-2007

O estudo teve por objetivo estimar a prevalência da infecção e genótipo do vírus da hepatite C (HCV), bem como determinar a subnotificação de casos. O total de 115.386 gestantes atendidas pelo Programa Estadual de Proteção à Gestante de Mato Grosso do Sul foi submetido à coleta de sangue para a detecção de anti-HCV, de 2005 a 2007. A prevalência da infecção pelo HCV foi de 1,07 casos/1.000. As amostras positivas foram submetidas à detecção do HCV-RNA e genotipadas. O genótipo 1 foi encontrado em 73 por cento das amostras, 24,3 por cento pertenciam ao genótipo 3 e 2,7 por cento ao genótipo 2. A subnotificação de casos de hepatite C foi de 35,5 por cento.

The study was aimed at estimating the prevalence of infection with and the genotype of hepatitis C virus (HCV), and to determine the extent of underreporting of HCV cases. A total of 115,386 pregnant women seen by the Program for Protection of Pregnancy [Programa Estadual de Proteção à Gestante] of the state of Mato Grosso do Sul, Central-Western Brazil, were tested for anti-HCV antibodies between 2005 and 2007. Prevalence of HCV infection was 1.07 cases per thousand. Positive samples were tested for HCV RNA and genotyped. Genotype 1 was detected in 73 percent of samples, genotype 3 in 24.3 percent, and genotype 2 in 2.7 percent. Underreporting of hepatitis C cases was 35.5 percent.

El estudio tuvo por objetivo estimar la prevalencia de la infección y genotipo del virus de la hepatitis C (HCV), así como determinar la subnotificación de casos. El total de 115.386 gestantes atendidas por el Programa Estatal de Protección a la Gestante de Mato Grosso do Sul (Centro-Oeste de Brasil) fueron sometidas a la colecta de sangre para la detección de anti-HCV, de 2005 a 2007. La prevalencia de la infección por el HCV fue de 1,07 casos/1000. Las muestras positivas fueron sometidas a la detección del HCV-RNA y genotipadas. El genotipo 1 fue encontrado en 73 por ciento de las muestras, 24,3 por ciento pertenecían al genotipo 3 y 2,7 por ciento al genotipo 2. La subnotificación de casos de hepatitis C fue de 35,5 por ciento.

Dupla mandibulotomia com preservação do feixe vásculo-nervoso alveolar inferior para acesso a tumores do espaço parafaríngeo / Double mandibular osteotomy with inferior alveolar neurovascular bundle preservation for improved access to tumors of the parapharyngeal space

Introdução: O acesso cirúrgico ao espaço parafaríngeo para aressecção de tumores apresenta grande dificuldade, uma vezque à medida que se avança superiormente nesta região háuma restrição espacial pela presença do ramo mandibular e doprocesso mastoide do osso temporal. Objetivo: Descrever, atravésda experiência de três casos, a técnica de dupla mandibulotomia,quando um acesso mais amplo é necessário para a ressecçãode neoplasias do espaço parafaríngeo. Método: A técnicautilizada consiste de uma osteotomia na região parassinfisáriacombinada a uma osteotomia no ramo ascendente da mandíbula,o que permite que o segmento contendo o corpo mandibularseja rotacionado para fora do campo operatório, preservando ofeixe vásculonervoso alveolar inferior. Após a ressecção tumoral,é realizada a redução e fixação interna rígida do segmento.Resultados: O uso das duas osteotomias permite não apenasum acesso mais amplo, mas também a proteção ao feixe vásculonervosoalveolar inferior, o qual permanece contido no segmentomandibular osteotomizado e mobilizado. Conclusão: A utilizaçãodesta técnica dispensa o uso do bloqueio maxilomandibulare proporciona ao paciente retornar à função mastigatória deforma precoce no pós-operatório, assim como a permanênciada vitalidade do feixe vásculonervoso alveolar inferior, sem aocorrência de hipoestesia no pós-operatório.