ABSTRACT
Objective: The aim of this study was to compare dental color changes after a one-session tooth bleaching procedure using 35% hydrogen peroxide with and without hybrid light (LED/diode laser) activation. Material and Methods: 20 volunteers were included in a split-mouth controlled clinical trial. A 35% hydrogen peroxide gel was applied directly on the buccal surface and adjacent areas of all upper anterior teeth. The six teeth were divided into two groups: the upper right incisors and canine were submitted to the tooth bleaching with the gel and the hybrid light (LED/diode laser) while the left incisors and canine were submitted to tooth bleaching with only the gel. Dental color was measured with a visual color scale and a spectrophotometer at five different moments: initial appointment, immediately after prophylaxis, and 14, 30 and 180 days after bleaching. Results: The comparison between the results of both treatments (with and without LED/laser) did not show any statistically significant differences (p > 0.05; Wilcoxon test) neither for objective (spectrophotometer) nor for subjective evaluations (visual color scale). Conclusion: The results of the present study showed that there are no differences in dental color changes between dental bleaching with gel and LED/Laser activation and dental bleaching with only gel.
ABSTRACT
Com a evolução da Implantodontia, há uma demanda crescente por alternativas de tratamento que possibilitem menor tempo para a resolução dos casos clínicos. Uma oclusão bem equilibrada e protocolos de carregamento adequados desempenham um papel fundamental no sucesso e na longevidade dos implantes e das próteses. O presente trabalho visou, por meio de uma revisão da literatura atual, reportar a evolução dos conceitos de oclusão e dos protocolos de carregamento aplicados aos casos reabilitados com implantes unitários nas regiões posteriores de mandíbula e maxila. Apesar da falta de consenso, a literatura, de modo geral, sugere prudência ao adotar protocolos de carregamento imediato ou precoce de implantes unitários, preferencialmente evitando contatos oclusais durante o período de osseointegração.
Recent advances on Implant Dentistry led to an increasing demand for alternatives with less chairside time to finish clinical cases. A well balanced occlusion and adequate loading protocols play a fundamental role on the success and longevity of implants and prostheses. The present paper aims to report, through a review of the current literature, the evolution of the concepts regarding occlusion and loading protocols applied to clinical cases using single-tooth implants on posterior regions. Despite the absence of a consensus about the theme, the current literature suggests, in general, caution when choosing to adopt immediate or premature loading of single-tooth implants placed on posterior regions, preferably avoiding occlusal loads during the osseointegration period.
Subject(s)
Humans , Dental Occlusion , Immediate Dental Implant LoadingABSTRACT
INTRODUÇÃO: Informações sobre hepatite C durante a gestação em serviços brasileiros são escassas. O objetivo deste estudo foi verificar os fatores associados à transmissão vertical do vírus da hepatite C em gestantes. MÉTODOS: Estudo observacional, transversal, realizado em gestantes procedentes do município de Campo Grande/MS, que apresentaram sorologia reagente e confirmada para VHC, no período de 2002 a 2005. Considerou-se transmissão vertical sorologia VHC positiva por ELISA, confirmada com PCR, após os 18 meses de vida do recém-nascido. Considerou-se fatores associados a TV: tipo de parto, tempo de rotura de membranas, amamentação, histórico de transfusões sanguíneas prévias, uso de drogas ilícitas, número de parceiros sexuais e presença de tatuagens pelo corpo. RESULTADOS: Identificou-se 58 gestantes portadoras do VHC, revelando prevalência de infecção de 0,2 por cento (58/31.187). Das 58 pacientes, 23 (39,6 por cento) preencheram os critérios de inclusão no estudo. A taxa de TV foi de 13 por cento (3/23), sendo os subtipos virais mais frequentes: 1a (53 por cento), 1b (30 por cento), 2b (4 por cento) e 3a (13 por cento). Duas (8,7 por cento) pacientes apresentaram co-infecção pelo HIV. Houve associação (p < 0,05) entre TV e carga viral elevada (> 2,5x10(6)) e entre TV e uso de drogas ilícitas pela mãe (p < 0,05). CONCLUSÕES: O presente estudo demonstra que elevada viremia materna e o uso de drogas ilícitas pela mãe associam-se a transmissão materno-fetal do VHC.
INTRODUCTION: Data concerning hepatitis C virus infection during pregnancy in Brazilian medical services are scarce. This study aimed to verify factors associated with vertical transmission (VT) of HCV in pregnant women. METHODS: Observational transversal study of pregnant women from Campo Grande, MS, central Brazil, with confirmed reagent serology for HCV infection from 2002 to 2005. Vertical transmission was considered to be positive HCV serology by ELISA, confirmed by PCR, after 18 months of life of the newborn. The factors studied associated with VT were: delivery mode, time of premature rupture of membranes, breastfeeding, blood transfusion history, drug addiction, number of sexual partners and the presence of body tattoos. RESULTS: Fifty-eight pregnant women with HCV infection were identified, indicating a prevalence rate of 0.2 percent (58/31,187). Of these 58 pregnant women,23 (39.6 percent) fulfilled the inclusion criteria. The VT rate was 13 percent (3/23), and the most frequent HCV viral subtypes were 1a (53 percent), 1b (30 percent), 2b (4 percent) e 3a (13.0 percent). Two (8.7 percent) patients were coinfected with HIV. A significant association (p < 0.05) was observed between VT and high maternal serum viremia (> 2.5x10(6)) and VT and the use of illicit drugs by the mother. CONCLUSIONS: The present study demonstrates that high serum maternal viremia for HCV and the use of illicit drugs by the mother are associated with vertical transmission of HCV.