Asunto(s)
Caries Dental/prevención & control , Fluoruros/uso terapéutico , Fluoruros de Estaño/uso terapéutico , Dentina/efectos de los fármacos , Dentina/ultraestructura , Fluoruros Tópicos/farmacología , Fluoruros Tópicos/uso terapéutico , Humanos , Hidroxiapatitas , Odontoblastos/efectos de los fármacos , Odontoblastos/ultraestructuraRESUMEN
The surface of tooth enamel that had been left in touch with the liquid or the mix of a zinc polyacrylate dental cement was studied by scanning electron microscopy. Both treatments produced lesions on the enamel and were represented by unevenly distributed microcavities of varying extension. Topically applied SnF2 did not modify the aspect of the treated surface.
Asunto(s)
Acrilatos/farmacología , Cementos Dentales/farmacología , Esmalte Dental/efectos de los fármacos , Zinc/farmacología , Grabado Ácido Dental , Esmalte Dental/ultraestructura , Humanos , Cemento de Policarboxilato/farmacología , Polímeros , Fluoruros de Estaño/farmacologíaRESUMEN
Human teeth were suspended in a basal medium with sucrose 10%; they were incudated for formation of dental plaques "in vitro". The microorganisms used were: Strep. mutans, Lactobacillus salivarius var. salivarius and a mixture of them. The following aspects were stablishad by scanning electron microscopy: 1) The teeth inoculated with Strep. mutans had coccoid forms, lying on an organic film with spheric spaces in some sectors, and irreguar forms in others (Fig. 1). 2) The teeth inoculated with Lactobacillus salivarius had rod forms attached to the adamantine surface (Fig. 2, 3). 3) Teeth incubated with the mixutre had rod forms over a granular film (Fig. 4). 4) The control teath did not have plaque (Fig. 5). This experience shows that the extracellular polisacharide, reticulated or granular (mutano) appeared only in teeth incubated with Strep. mutans alone (Fig. 1) or mixed with Lactobacillus (Fig. 4). On the other hand Lactobacillus appeared attached on the enamel surfaces, perhaps due to cohesive adhesive forces (Fig. 2). Two different interpretation or the formation of dental plaques that take place on the enamel free surfaces of teeth are presented.
Asunto(s)
Placa Dental/microbiología , Lactobacillus/aislamiento & purificación , Streptococcus mutans/aislamiento & purificación , Streptococcus/aislamiento & purificación , Medios de Cultivo , Placa Dental/etiología , Humanos , Técnicas In Vitro , Saliva/microbiologíaRESUMEN
Human teeth were suspended in a basal medium with sucrose 10
; they were incudated for formation of dental plaques [quot ]in vitro[quot ]. The microorganisms used were: Strep. mutans, Lactobacillus salivarius var. salivarius and a mixture of them. The following aspects were stablishad by scanning electron microscopy: 1) The teeth inoculated with Strep. mutans had coccoid forms, lying on an organic film with spheric spaces in some sectors, and irreguar forms in others (Fig. 1). 2) The teeth inoculated with Lactobacillus salivarius had rod forms attached to the adamantine surface (Fig. 2, 3). 3) Teeth incubated with the mixutre had rod forms over a granular film (Fig. 4). 4) The control teath did not have plaque (Fig. 5). This experience shows that the extracellular polisacharide, reticulated or granular (mutano) appeared only in teeth incubated with Strep. mutans alone (Fig. 1) or mixed with Lactobacillus (Fig. 4). On the other hand Lactobacillus appeared attached on the enamel surfaces, perhaps due to cohesive adhesive forces (Fig. 2). Two different interpretation or the formation of dental plaques that take place on the enamel free surfaces of teeth are presented.
RESUMEN
Human teeth were suspended in a basal medium with sucrose 10
; they were incudated for formation of dental plaques [quot ]in vitro[quot ]. The microorganisms used were: Strep. mutans, Lactobacillus salivarius var. salivarius and a mixture of them. The following aspects were stablishad by scanning electron microscopy: 1) The teeth inoculated with Strep. mutans had coccoid forms, lying on an organic film with spheric spaces in some sectors, and irreguar forms in others (Fig. 1). 2) The teeth inoculated with Lactobacillus salivarius had rod forms attached to the adamantine surface (Fig. 2, 3). 3) Teeth incubated with the mixutre had rod forms over a granular film (Fig. 4). 4) The control teath did not have plaque (Fig. 5). This experience shows that the extracellular polisacharide, reticulated or granular (mutano) appeared only in teeth incubated with Strep. mutans alone (Fig. 1) or mixed with Lactobacillus (Fig. 4). On the other hand Lactobacillus appeared attached on the enamel surfaces, perhaps due to cohesive adhesive forces (Fig. 2). Two different interpretation or the formation of dental plaques that take place on the enamel free surfaces of teeth are presented.