ABSTRACT
PURPOSE: This study evaluated whether the presence of the salivary acquired pellicle (AP) had any effect on the dentin's darkening and on the caries arresting effect after the use of SDF + KI, in a cariogenic challenge. METHODS: Human dentin specimens were standardised, submitted to artificial caries lesion formation, and divided into five groups (n = 20): C: control group-no treatment, SDF: 38% SDF, APSDF: SDF 38% and AP, KISDF: 38% SDF and KI, and APKISDF: 38% SDF, KI and AP, that were submitted to pH cycling. Colour evaluation (CIE L*a*b* system) and surface hardness were performed before and after the treatments/pH cycling. RESULTS: SDF and APSDF groups showed no difference in colour. KISDF and APKISDF groups showed significantly different colours than the groups without KI. SDF, APSDF, and APKISDF groups had less mineral loss than C and KISDF. SDF, APSDF, and APKISDF revealed significantly greater mineral recovery, compared to KISDF and C. CONCLUSION: The AP did not influence the dentin´s colour after SDF + KI, but had a protective role in modulating the dentin´s mineral gain/loss. KI used after SDF decreased the dentin´s darkening, and did not interfere with the dentin de/remineralization process.
Subject(s)
Dental Caries , Potassium Iodide , Humans , Dental Pellicle/pathology , Color , Dentin , Fluorides, Topical/pharmacology , Dental Caries/prevention & control , MineralsABSTRACT
ABSTRACT Sera from 163 Equidae (143 equines and 20 mules) from 16 municipalities in the southern region of São Paulo State, Brazil, were selected in a two-stage stratified probabilistic sample survey. Serum samples were collected from October 2004 to June 2005. The antibody prevalence was estimated against eastern (EEE), western (WEE) and Venezuelan (VEE) equine encephalitis, equine herpesvirus (EHV), equine viral arteritis (EVA), equine influenza 1 and 2 (EI 1 and 2) and vesicular stomatitis (Indiana 2 Cocal virus COCV and Indiana 3 Alagoas virus (VSAV). The results showed positivity of 26% for EHV, 21% for COCV, 5% for VCAV, 16% for EEE, 2.26% for VEE, 11% for influenza Equi/2 and 2.7% for influenza Equi/1. No antibodies were detected against WEE and AVE. These results suggest that the equine population in the south of São Paulo State is exposed to infection risk of HVE, IE Equi-1(H7N7) and Equi-2 (H3N8), EEE, VEE and Indiana 2 Cocal (COCV) Indiana 3 Alagoas (VSAV).
RESUMO Foram analisados soros de 163 equídeos (143 equinos e 20 muares) provenientes de 16 municípios do sul do Estado de São Paulo, parte no Vale do Ribeira e parte no litoral. Utilizouse uma amostra probabilística estratificada em dois estágios, sendo a unidade amostral de primeiro estágio constituída pela unidade de produção agropecuária (UPA) e a de segundo estágio pelo animal dentro da UPA sorteada. Os soros foram coletados no período de outubro de 2004 a junho de 2005. Foram estimadas as prevalências de anticorpos contra os vírus das encefalites equinas do tipo leste (EEE), oeste (WEE) e venezuelana (VEE), herpesvírus equino (HVE), arterite viral dos equinos (AVE), influenza equina 1 e 2 (IE-1 e 2) e estomatite vesicular Indiana 2 Cocal (COCV) e Indiana 3 Alagoas (VSAV). Foram utilizadas as técnicas de inibição da hemoaglutinação para a detecção de anticorpos contra os vírus IE-1 e 2 e de soroneutralização para os demais vírus estudados. Dos animais testados, 26% apresentaram anticorpos contra o HVE, 21% para COCV, 5% para VSAV, 16% para EEE, 2,26% para VEE, 11% para influenza Equi/2 e 2,7% para influenza Equi/1. Não se encontraram animais reagentes para WEE e AVE. A soroprevalência obtida sugere a circulação do HVE, dos vírus da IE Equi-1(H7N7) e Equi-2 (H3N8), dos vírus EEE e VEE e dos vírus da estomatite vesicular Indiana 2 Cocal (COCV) e Indiana 3 Alagoas (VSAV) no rebanho de equídeos do sul do Estado de São Paulo.