RESUMEN
AIM: To evaluate in vivo and ex vivo the accuracy of an electronic apex locator in primary molar teeth with or without root resorption. METHODOLOGY: Fifteen primary molar teeth with 30 root canals were divided into two groups: roots without resorption (n = 13) and roots with resorption (n = 17). Root canals were measured with the Root ZX apex locator in vivo, and then after tooth extraction, each canal was measured electronically ex vivo. The actual root canal length was measured visually, with the placement of a K-file into the most cervical edge of either apical foramen or resorption. The Student's t-test was applied for statistical analysis at a 5% significance level. RESULTS: The electronic apex locator was precise in 69% and 65% of the cases with and without root resorption, respectively (tolerance = ± 0.5 mm), in vivo and 69% and 77%ex vivo. When the tolerance was ± 1 mm, however, these figures increased to 92% and 94% for root canals with and without resorption, respectively, in vivo and ex vivo. No significant difference was observed between the resorbed and non-resorbed root canals measured using the Root ZX. CONCLUSION: The Root ZX apex locator was accurate in determining in vivo and ex vivo the working length ± 1 mm in primary molar teeth in over 90% of roots regardless of the presence of root resorption.
Asunto(s)
Diente Molar/anatomía & histología , Tratamiento del Conducto Radicular/instrumentación , Resorción Radicular/patología , Ápice del Diente/anatomía & histología , Diente Primario/anatomía & histología , Niño , Cavidad Pulpar/anatomía & histología , Electrónica Médica , Humanos , Odontometría/instrumentación , Sensibilidad y EspecificidadRESUMEN
In order to establish the pharmacological basis for the ethnomedicinal use of stem bark extracts of Calophyllum brasiliense Camb. in gastrointestinal affections, this study examined the effects of a dichloromethane fraction (DCMF), obtained from the hexane extract of bark, on ethanol, indomethacin and hypothermic restraint stress-induced gastric lesions in mice and rats, respectively. Oral administration of DCMF at doses ranging from 12.5-250 mg/kg significantly inhibited the development of gastric lesions in all the three test models. It caused significant decreases of the pyloric-ligation and bethanechol-stimulated gastric secretion, and also the free and total acidities. Besides, DCMF offered protection against ethanol-induced depletion of stomach wall mucus and reduction in nonprotein sulfhydryl concentration. The results indicate that DCMF from C. brasiliense possesses antisecretory, antiulcer and cytoprotective properties.
Asunto(s)
Antiulcerosos/uso terapéutico , Etanol/antagonistas & inhibidores , Indometacina/antagonistas & inhibidores , Úlcera Péptica/prevención & control , Extractos Vegetales/uso terapéutico , Administración Oral , Animales , Antiulcerosos/administración & dosificación , Antiulcerosos/aislamiento & purificación , Relación Dosis-Respuesta a Droga , Etanol/toxicidad , Ácido Gástrico/metabolismo , Hipotermia/complicaciones , Indometacina/toxicidad , Masculino , Ratones , Úlcera Péptica/etiología , Extractos Vegetales/administración & dosificación , Ratas , Ratas Wistar , Restricción Física , Estrés FisiológicoRESUMEN
Foi estudada a influencia de alojamento conjunto e tipo de parto na ocorrencia de aleitamento materno. Um grupo de gestantes (156) foi dividido aleatoriamente em alojamento conjunto e enfermaria convencional Outro grupo (95) foi dividido em parto vaginal e parto cesariano. Em ambos os estudos os grupos eram comparaveis quanto a dados sociais, economicos, obstetricos e neonatais. Concluiu-se que tanto as maes cuidadas em enfermaria convencional como aquelas que tiveram parto cesariano tendem a amamentar menos seus filhos