17 research outputs found
Viral, bacterial, and fungal infections of the oral mucosa:Types, incidence, predisposing factors, diagnostic algorithms, and management
Deformation of Mesh Type Stainless Palatal Plate of Maxillary Complete Denture and the Growth of Microorganisms
In vitro adhesion of Candida species to denture base materials
Adhesion of Candida species to prosthetic acrylic resins is an essential first step in the pathogenesis of denture stomatitis. Data on the relative adhesion of pathogenic non-albicans Candida species to different denture base materials are sparse. The purpose of the present study was to investigate in vitro adhesion of C. albicans, C. glabrata, C. krusei and C. dubliniensis to four different denture base materials. Specimens of both heat-cured resins (Vertex⹠Rapid Simplified and ProBase⹠Hot) and cold-cured resins (PaladurŸ A and PaladurŸ B) were prepared using a novel method and the adhesion of four strains each of the foregoing Candida species evaluated microscopically using a soft imaging system. There was a significant difference in yeast adherence between Vertex and the other resins. Only C. glabrata attached to Vertex, while all the remainder of the tested species adhered to all other resins tested except ProBase, which resisted C. krusei adhesion. There was a significant difference in candidal adhesion between cold-cured and heat-cured resins for three Candida species (C. albicans, P = 0.039; C. glabrata, P = 0.002 and C. krusei, P = 0.000). The type of denture base material and whether they are heat-cured or cold-cured play an important role in modifying candidal adhesion. © 2006 Blackwell Publishing Ltd.link_to_subscribed_fulltex
Differentiation of sugar assimilation characteristics and colony phenotypes in pathogenic and commensal oral candidal isolates
PRESENĂA DE LEVEDURAS DO GĂNERO CANDIDA NA SALIVA DE PACIENTES COM DIFERENTES FATORES PREDISPONENTES E DE INDIVĂDUOS CONTROLE PRESENCE OF CANDIDA GENUS YEASTS IN THE SALIVA OF PATIENTS WITH DIFFERENT PREDISPOSING FACTORS AND OF CONTROL INDIVIDUALS
Os microrganismos do gĂȘnero Candida sĂŁo, em geral, comensais da cavidade bucal, mas, em determinados indivĂduos e em situaçÔes especĂficas, podem transformar-se na forma parasitĂĄria, produzindo candidoses bucais. O objetivo deste trabalho foi analisar a presença das espĂ©cies do gĂȘnero Candida na saliva de indivĂduos controle, comparando com pacientes que apresentavam diferentes fatores predisponentes. Foram avaliados 493 pacientes, divididos em 7 grupos: prĂłtese total, prĂłtese parcial removĂvel, periodontite crĂŽnica de adulto, respiração bucal, aparelho ortodĂŽntico fixo, aparelho ortodĂŽntico removĂvel e aparelho extrabucal. O grupo controle consistiu de 570 indivĂduos que nĂŁo apresentavam nenhum desses fatores, divididos em 2 grupos: infantil e adulto. Foram realizados o isolamento e a identificação das espĂ©cies do gĂȘnero Candida. Os resultados mostraram maior porcentagem de pacientes positivos para Candida nos grupos com fatores predisponentes em relação aos controles. Houve predominĂąncia de isolamento de C. albicans em todos os grupos, porĂ©m, os pacientes com fatores predisponentes apresentaram diversidade maior de espĂ©cies<br>Candida genus microorganisms are common to the normal oral flora, but in certain individuals and in specific situations they can produce oral candidosis. The aim of this study was to analyze the presence of Candida species in the saliva of control individuals and compare the results with those from patients with different predisposing factors. Four-hundred and ninety-three patients were divided in 7 groups: full denture wearers, removable partial denture wearers, patients with adult chronic periodontitis, mouthbreathers, fixed orthodontic appliance wearers, removable orthodontic appliance wearers, or facebow wearers. The control group consisted of 570 individuals who did not present any of these factors, divided in 2 groups: child and adult. Isolation and identification of Candida species were performed. The results showed higher percentage of positives for Candida in patients with predisposing factors in relation to the control. C. albicans was predominant in all groups. However, patients with predisposing factors presented higher diversity of specie