ABSTRACT
BACKGROUND: The literature is scanty regarding the effect of radiation therapy (RT) on the mechanical properties of immature permanent teeth. AIM: To evaluate the effect of RT on the fracture resistance of simulated immature teeth submitted to different types of root reinforcement. DESIGN: Sixty-four human teeth simulating the Cvek stage 3 of root development were distributed into eight groups (n = 8), according to exposure or not to RT (70 Gy) and the root reinforcement method: Group NR (control)-no reinforcement/no RT; Group NR + RT (control)-no reinforcement/RT; Group PO-tricalcium silicate-based cement (TS) apical plug/canal obturation/no RT; Group PO + RT-TS apical plug/canal obturation/RT; Group TS-canal filling with TS/no RT; Group TS + RT-canal filling with TS/RT; Group FP-TS apical plug/fibreglass post/no RT; and Group FP + RT-TS apical plug/fibreglass post/RT. Fracture resistance was determined using a universal testing machine (0.5 mm/min). RESULTS: In the intergroup comparison, nonirradiated teeth had higher fracture resistance (p < .05). Groups FP and FP + RT had higher fracture resistance (p < .001). CONCLUSION: Radiotherapy affected the fracture resistance of simulated immature teeth. Reinforcement with fibreglass posts increased the fracture resistance, regardless of the radiation.
Subject(s)
Root Canal Filling Materials , Tooth Fractures , Humans , Calcium Compounds , Tooth Root , SilicatesABSTRACT
This study investigated the effect of radiation timing on the bond strength of resin cement to intraradicular dentine. Fifty human teeth were distributed into 5 groups (n = 10): Control (nonirradiated teeth), Before-RCT (teeth irradiated before root canal treatment), After-CH (teeth irradiated after canal preparation and placement of calcium hydroxide intracanal dressing), After-RCT (teeth irradiated after completion of root canal treatment) and After-FPL (teeth irradiated after luting of a glass fibre post). Each tooth received 70 Gy irradiation. The roots were sectioned for push-out strength testing. After-RCT and After-FPL groups had significantly lower push-out strength than the control at the middle third (p < 0.05). Control and After-CH groups had a higher percentage of cohesive dentine failure. Radiotherapy after root canal obturation and post luting adversely affected the adhesiveness of resin cement to intraradicular dentine. Teeth irradiated before root canal treatment and after placement of calcium hydroxide had the best performance.
Subject(s)
Dental Bonding , Post and Core Technique , Humans , Resin Cements/therapeutic use , Resin Cements/chemistry , Calcium Hydroxide/therapeutic use , Dentin , Dental Pulp Cavity , Root Canal Preparation , Materials Testing , Glass/chemistry , Dental Stress AnalysisABSTRACT
Objetivo: identificar os cuidados de Enfermagem Oncológica em Radioterapia. Método: trata-se de um estudo qualitativo, descritivo, realizado em um centro de tratamento oncológico referência com três enfermeiras. Coletaram-se os dados mediante entrevistas semiestruturadas por meio de um roteiro e analisados a partir da técnica de Análise de Conteúdo. Resultados: extraíram-se as expressões-chave e ideias centrais, emergiram três categorias que desenharam a atuação do enfermeiro: a) Equipe multidisciplinar envolvida na radioterapia; b) O processo de trabalho das enfermeiras em radioterapia; e, c) As práticas para amenizar os efeitos colaterais da radioterapia Conclusão: ressaltam-se que os cuidados oncológicos em radioterapia consistem em ações individualizadas que, auxiliam diretamente na prevenção, minimização e/ou tratamento das reações adversas causadas pelo tratamento, articulados promovem melhor qualidade de vida do paciente oncológico.(AU)
Objective: to identify the care of Oncology Nursing in Radiotherapy. Method: this is a qualitative, descriptive study performed at a referral center for cancer treatment with three nurses. The data were collected through semi-structured interviews through a script and analyzed using the Content Analysis technique. Results: key expressions and central ideas were extracted, three categories emerged that designed the nurse's performance: a) Multidisciplinary team involved in radiotherapy; b) The work process of the nurses in radiotherapy; and c) Practices to mitigate the side effects of radiotherapy Conclusion: it is emphasized that oncological care in radiotherapy consists of individualized actions that directly aid in the prevention, minimization and / or treatment of the adverse reactions caused by the treatment, articulations promote better quality of life of cancer patients.(AU)
Objetivo: identificar los cuidados de Enfermería Oncológica en Radioterapia. Método: se trata de un estudio cualitativo, descriptivo, realizado en un centro de tratamiento oncológico referencia con tres enfermeras. Se recolectaron los datos mediante entrevistas semiestructuradas por medio de un guion y analizados a partir de la técnica de Análisis de Contenido. Resultados: se extrajeron las expresiones clave e ideas centrales, surgieron tres categorías que diseñaron la actuación del enfermero: a) Equipo multidisciplinario involucrado en la radioterapia; b) el proceso de trabajo de las enfermeras en radioterapia; y c) las prácticas para amenizar los efectos colaterales de la radioterapia Conclusión: se resalta que los cuidados oncológicos en radioterapia consisten en acciones individualizadas que, auxilian directamente en la prevención, minimización y / o tratamiento de las reacciones adversas causadas por el tratamiento, articulados promueven mejor calidad de vida del paciente oncológico.(AU)
Subject(s)
Humans , Female , Adult , Oncology Nursing , Radioisotope Teletherapy , Radiotherapy , Nurse's Role , Radiologic and Imaging Nursing , Neoplasms/nursing , Neoplasms/radiotherapy , Skin , Epidemiology, Descriptive , Qualitative ResearchABSTRACT
O Carcinoma mucoepidermoide juvenil é uma doença rara, que ocorre mais frequentemente nas glândulas menores do palato duro. Os pacientes, em geral, referem edema progressivo e indolor. O tratamento de escolha é a ressecção cirúrgica, estando a radioterapia indicada no pós-operatório, em casos de presença de fatores de mau prognóstico. Relatamos o caso de uma paciente de 12 anos de idade com carcinoma mucoepidermoide juvenil em palato duro com radioterapia adjuvante.
Juvenile mucoepidermoid carcinoma is a rare disease that occurs most often in the minor glands of the hard palate. Patients usually report a progressive, painless swelling. The treatment of choice is surgical resection, with radiotherapy given postoperatively when poor prognostic factors are present. We report the case of a 12-year-old female with mucoepidermoid carcinoma of the hard palate with adjuvant radiotherapy.
