Effect of new dentures on interocclusal distance during speech

Purpose: The aim of this study was to investigate the changes in interocclusal distance during the pronunciation of /m/ and /s/ sounds in the Portuguese language, in partially edentulous patients before and after insertion of new dentures. Materials and Methods: Subjects were divided into a control group consisting of 18 completely dentate patients and an experimental group consisting of 18 patients who were edentulous in the maxilla and classified as Kennedy Class I in the mandible. The experimental group had new dentures placed and the occlusal vertical dimension corrected. A magnetic jaw-tracking device measured the interocclusal distance during pronunciation of the /m/ and /s/ phonemes. Interocclusal distance evaluations were carried out in a single session for the control group. In the experimental group, the measurements were carried out before insertion of new dentures; immediately after insertion; and after 6 and 24 hours; 2 days; I and 2 weeks; 1, 2, 3, and 6 months; and I year. Results: Comparison between groups revealed significant difference in interocclusal distance for the /m/ sound both before and after insertion of dentures up to 2 months. For the /s/ phoneme, there was no difference between the groups before prosthesis insertion, or after 3, 6, and 12 months of prosthesis use. There were significant differences for the /m/ sound only at 6 and 12 months after new denture insertion, and for the /s/ sound at all periods evaluated. Conclusion: Insertion of new dentures, with the vertical dimension corrected, changes the interocclusal distance of speech during phonation of /m/ and /s/ sounds.16553353

In vivo assessment of the effect of an adhesive for complete dentures on colonisation of Candida species

Objective: Denture adhesives have long been recognised by denture wearers as a useful adjunct to denture retention and stability. The objective of the present study was to evaluate, in vivo, the effect of a denture adhesive on oral quantities of Candida species by determination of absolute counts of colony-forming units (CFU) per ml of saliva of individuals who use this denture adhesive for a period of 14 days. Materials and methods: Twenty-four individuals were randomised in two equal groups of 12 (test and control), with the individuals of the test group using the adhesive for 14 days. Samples of saliva were collected from all individuals on days 0 (initial), 7 and 14. Aliquots of saliva were diluted and plated in duplicate on Sabouraud dextrose agar with chloramphenicol and incubated for 37 degrees C for 48 h, the CFU/ml were counted in the individuals of each group and the data of each group were compared at the different time periods and analysed statistically by the non-parametric Mann-Whitney U-test (alpha < 5%). Results: There were no statistically significant differences between the test and control groups during the test periods. Conclusion: Within of the limitations of this study, the data suggested that the denture adhesive tested did not significantly alter the oral microbiota during the 14-day trial period.27430330

Effect of a denture cleanser on the concentration of volatile sulphur compounds and denture biofilm in institutionalised elderly

Objective: To determine the effectiveness of a denture cleanser in reducing the concentration of volatile sulphur compounds (VSC) and its antimicrobial action. Background: Micro-organisms from the denture biofilm can cause local and systemic disease and halitosis. Denture cleansers are important adjuncts in oral care, but there is limited investigation on their effect in malodour compounds. Material and methods: Nineteen institutionalised elderly who wore at least an upper denture were selected; their VSC concentrations were measured and the denture biofilm was collected. In phase 1, the subjects wore their old denture and data were collected before (B(0)) and after 7(A(1)), 14(A(2)), 28(A(3)) days of continuous daily use of the denture cleanser. In phase 2, new dentures were inserted and measurements were made at 30(A(1.1)), 60(A(2.2)), 90(A(3.3)) days of treatment. Results: The VSC concentration increased from B(0) to A(1) (p < 0.05)(,) but no differences were found for the others intervals of times. Total micro-organism data did not show a statistical difference between times in Phase I, but in Phase II, there was a statistical difference (p < 0.05) and a progressive re-colonisation was observed. Conclusion: Within the limits of this study, it was concluded that the denture cleanser had no antimicrobial effect and VSC levels were not reduced.28213413

Estudo da subnotificação dos casos de Aids em Alagoas (Brasil), 1999-2005 Study of the under-reporting of Aids cases in Alagoas (Brazil), 1999-2005

A subnotificação dos casos de Aids dificulta e até mesmo impossibilita o planejamento de ações para o controle da epidemia. Este estudo foi realizado com o objetivo de verificar a subnotificação dos casos de Aids no período de 1999 a 2005 em Alagoas. Analisaram-se as declarações de óbito (DO) por Aids, registradas no Sistema de Informação sobre Mortalidade (SIM) comparando-as com o Sistema de Informação de agravos de notificação (Sinan), utilizando a técnica de relacionamento entre bancos de dados em Alagoas. O percentual de subnotificação no período foi de 12,4%. Entre os 49 óbitos estudados, 67% (33) ocorreram no sexo masculino e 33% (16) no feminino, observando-se uma razão entre os sexos de 2:1. Com relação à escolaridade, 4,08% (2) e 6,12% (3) estavam relacionadas às faixas de 1 a 3 e de 4 a 7 anos de estudo, respectivamente. A faixa etária que apresentou o maior número de óbitos foi entre 20 e 49 anos, tanto no sexo feminino (11; 68,7%) como no masculino (23; 69,6%). A subnotificação revelada pela diferença entre óbitos por Aids registrados no SIM e ausentes no Sinan como casos da doença alerta para a necessidade de serem implementadas políticas públicas dirigidas ao problema.<br>The under-reporting of Aids (Acquired Immune Deficiency Syndrome) cases makes it difficult and even impossible to plan means to control the epidemic. This study aims to check out the under-reporting of Aids cases from 1999 to 2005 in Alagoas (Brazil). The deaths certificates causes by Aids stored at the Mortality Data System (SIM) in comparison to the Data System of Notification Diseases (Sinan), has been analyzed using the technique of relationship between these two data systems in Alagoas. According to the study, the proportion of under-reporting of Aids cases during this period was of 12.4%. Among the 49 deaths studied, 67% (33) were men and 33% (16) were women configuring a gender rate of 2:1. As to education level, 4,08% (2) and 6,12% (3) of the deaths by Aids were of people having 1 to 3 and from 4 to 7 years of study, respectively. The age group that presented the largest number of deaths was from 20 to 49 years old, either female (11; 68,7%) or male gender (23; 69,6%). The comparison between the Mortality Data System and Data System for Disease Notification revealed a high proportion of under-reporting of deaths by Aids, stressing the need for a specific public policy on the matter