RESUMO
Adhesive procedures are essential to most restorative protocols used in modern dentistry. Increasing demand and constant interest in new products have stimulated dental manufacturers to produce new adhesive systems and marketing campaigns that announce fast and easy bonding. However, laboratorial and clinical studies show that, usually, ease of application of an adhesive system does not relate to its competence in creating a quality, long-term adhesive interface. This article will present relevant data from the scientific literature to help clinicians understand quality adhesion and achieve excellent results with the current adhesion systems.
Assuntos
Adesivos/química , Colagem Dentária , Materiais Dentários/química , Condicionamento Ácido do Dente/métodos , Adesivos/classificação , Adesivos/efeitos da radiação , Colágeno/ultraestrutura , Resinas Compostas/química , Resinas Compostas/efeitos da radiação , Esmalte Dentário/ultraestrutura , Materiais Dentários/classificação , Materiais Dentários/efeitos da radiação , Dentina/ultraestrutura , Adesivos Dentinários/química , Adesivos Dentinários/efeitos da radiação , Humanos , Hidrólise , Luz , Ácidos Fosfóricos/química , Polímeros/química , Polímeros/efeitos da radiação , Resinas Sintéticas/química , Estresse Mecânico , Fatores de Tempo , Água/químicaRESUMO
Length of resin tags yielded by utilization of an one-step conventional adhesive system and self-etching adhesive system on unground enamel was observed. In study Groups I and III, the enamel surface was etched for 60 seconds with 35% phosphoric acid gel and adhesive systems PQ1 (Ultradent Products, Inc) and Adper Prompt L Pop (3M/ESPE) were applied. Adper Prompt L Pop (3M/ESPE) was also applied in Group II in accordance with the manufacturer's recommendations. After application of these adhesive systems to dental enamel, specimens were prepared for light microscopy analysis to ascertain degree of penetration (x400). The results were submitted to an analysis of variance at the 5% level; whenever there was significance, the Tukey test was applied at the 5% level. It was found that acid etching prior to application of conventional and self-etching adhesive materials provided higher penetration of the adhesive into the unground enamel surface compared to that achieved solely by application of self-etching adhesive.
Assuntos
Colagem Dentária , Cimentos Dentários/química , Esmalte Dentário/ultraestrutura , Condicionamento Ácido do Dente , Adesivos/química , Adesivos/classificação , Adolescente , Adulto , Resinas Compostas/química , Cimentos Dentários/classificação , Profilaxia Dentária , Adesivos Dentinários/química , Humanos , Ácidos Fosfóricos/química , Cimentos de Resina/química , Propriedades de SuperfícieRESUMO
OBJECTIVE: Patients in the neonatal intensive care unit require life support and monitoring equipment that must be securely attached to the skin; removal or replacement often causes skin trauma. In this study, we compared the effects of application and removal of three different adhesives on the skin barrier function of premature neonates. The effects were measured by transepidermal water loss (TEWL), colorimetric measurements, and visual inspection. DESIGN: Thirty neonates, between 26 and 40 weeks of gestational age and with birth weights ranging from 690 to 3000 gm, were enrolled in the study during the first week of life. Pieces of plastic tape (1 cm2), pectin barrier, and hydrophilic gel were applied to previously undisturbed sites on the back. A fourth site was used as a control. We measured TEWL, colorimetric readings, and visual inspection scores of skin irritation and stripping at each of the four sites serially: before adhesive application, 30 minutes after adhesive removal, and 24 hours later. RESULTS: Thirty minutes after adhesive removal, TEWL, colorimetric measurements, and visual inspection scores were all significantly higher at the sites of plastic tape and pectin barrier removal than at the control and gel adhesive sites (p < 0.01), demonstrating greater disruption of skin barrier function with removal of the plastic tape and pectin barrier. When the neonates were divided into three groups on the basis of birth weight (< 1000 gm [n = 10], 1000 to 1500 gm [n = 11], and > 1500 gm [n = 9], the same pattern of greater disruption in skin barrier function, as measured by TEWL, was observed in each birth weight group. Twenty-four hours after adhesive removal, TEWL of the plastic tape and pectin barrier sites were not significantly different from the control site, indicating recovery of skin barrier function. CONCLUSIONS: This study demonstrates that a single application and removal of two commonly used adhesives, plastic tape and pectin barrier, disrupts skin barrier function in neonates of varying gestational ages.
Assuntos
Adesivos/efeitos adversos , Eritema/etiologia , Recém-Nascido Prematuro , Pele/lesões , Adesivos/classificação , Peso ao Nascer , Colorimetria , Eritema/diagnóstico , Eritema/fisiopatologia , Géis , Idade Gestacional , Humanos , Recém-Nascido , Terapia Intensiva Neonatal , Pectinas , Fatores de Tempo , Perda Insensível de ÁguaRESUMO
O surgimento de novos sistemas de adesão tem revolucionado a Odontologia Restauradora. Os adesivos dentinários são indispensáveis na prática clínica diária e oferecem novas alternativas de tratamento. Entretanto, muitos são os novos produtos lançados no mercado, cada um com seu particular mecanismo de ação, o que acaba por confundir o profissional. A intenção deste trabalho é uma forma geral de informar e descrever os principais adesivos dentinários com seus básicos mecanismos de ação, possibilitando com isso um maior entendimento da evolução de tais sistemas