ABSTRACT
Abstract The present study aimed to evaluate effects of different surface treatments and aging of composite cylinders on bond strength of composite resin repair. Thirty-two composite cylinders were produced and divided into four groups according to type of surface treatment and storage time of composite cylinder and repair. Cylinder surface of control group (Gcontrol) received no treatment before composite repair. Other groups were sandblasted with aluminum oxide (GAl2O3), followed by silane (GAl2O3sil) or adhesive (GAl2O3ad). Composite cylinders were stored in artificial saliva for either 24 hours or 1 year. Repairs were performed and stored in artificial saliva for 24 hours or 1 year and repair strength was evaluated using microtensile bond strength test. Data were submitted to Student’s t test, two-way ANOVA, and post hoc test for storage time and treatment (α = 0.05). Gcontrol group showed lower values of aging of composite cylinder and storage time of repair (24 hours or 1 year for both) compared with other groups (p < 0.05). GAl2O3ad and GAl2O3sil groups did not exhibit decreased microtensile bond strength with aged repairs (1 year; p > 0.05). Polymer degradation was significant for composite cylinders during the first year of storage in Gcontrol, GAl2O3, and GAl2O3ad groups (p < 0.05). In GAl2O3sil group, storage time of composite cylinders was not significant (p > 0.05). Aging of composite resin influenced bond strength of restoration repair for up to 1 year. Sandblasting with Al2O3, followed by application of silane layer, produced high bond strength after composite or repair aging.
Subject(s)
Composite Resins/chemistry , Dental Bonding/methods , Dental Restoration Repair/methods , Resin Cements/chemistry , Tensile Strength , Aluminum Oxide/chemistry , Analysis of Variance , Curing Lights, Dental , Materials Testing , Reproducibility of Results , Saliva, Artificial/chemistry , Silanes/chemistry , Surface Properties/drug effects , Time FactorsABSTRACT
Understanding the daily life of a woman undergoing hemodialysis. Method: qualitative study conducted with 9 women by means of interviews in February and March 2013 in the hemodialysis unit ofa hospital in Zona da Mata (Minas Gerais), Brazil. Results: the comprehensive analysis unveiled 3 units of meaning: having a chronic kidney disease and facing hemodialysis, hemodialysis and its reactions, the daily life of a woman treated with hemodialysis. Feelings of fear and rejection were noticed. However, religion and family proved to be important for acceptance and hope during treatment. Conclusion: we highlight the importanceof the nurses role in the substitutive renal therapy service. This professional works as an educator, promotingself-care and assisting the female patients to find new ways to live according to their own limitations...
Compreender o cotidiano da mulher em hemodiálise. Método:estudo qualitativo realizado com 9 mulheres por meio de entrevistas em fevereiro e março de 2013 no setor de hemodiálise de um hospital da Zona da Mata Mineira. Resultado: a análise compreensiva desvelou3 unidades de significado: ser portadora de doença renal crônica e enfrentar a hemodiálise, a hemodiálise e suas reações, o cotidiano da mulher em tratamento por hemodiálise. Foram percebidos sentimentos de medo e rejeição. Todavia, a religião e a família se mostraram importantes na aceitação e esperança durante o tratamento. Conclusão: destaca-se a importância do papel do enfermeiro no serviço de terapia renal substitutiva. Esse profissional atua como educador, promove o autocuidado e auxilia as pacientes a encontrar novas maneiras de viver de acordo com seus próprios limites...
Comprender el cotidiano de la mujer en hemodiálisis. Método: estudio cualitativo realizado con 9 mujeres por medio de entrevistas en febrero y marzo de 2013 en la unidad de hemodiálisis de un hospital en la Zona da Mata (Minas Gerais), Brasil. Resultados: el análisis desveló 3 unidades de significado: estar con una enfermedad renal crónica y someterse a hemodiálisis, la hemodiálisis y sus reacciones, el cotidiano de una mujer tratada con hemodiálisis. Se percibieron sentimientos de miedo y rechazo. Sin embargo, la religión y la familia han demostrado ser importantes para la aceptación y la esperanza durante el tratamiento. Conclusión: se destaca la importancia del papel del enfermero en el servicio de terapia renal sustitutiva. Este profesional actúa como educador,promueve el autocuidado y ayuda a las pacientes a encontrar nuevas maneras de vivir de acuerdo con sus propias limitaciones...