RESUMO
BACKGROUND: Prompt-L-Pop is a sixth generation bonding system contains methacrylated phosphoric acid esters that combine an acidic component for etching the enamel and a primer, is an all-in-one adhesive. This study was undertaken to compare the bonding strength of brackets to enamel with traditional bonding technique and the new Prompt-L-Pop system using the same composite resin. MATERIALS AND METHODS: In this in vitro experimental study, 60 human premolar teeth extracted for orthodontic treatment were collected. The samples were randomly divided into three groups comprising of 20 teeth in each group. Shear bond strength and ARI scores for the specimens were measured. Comparison was done using one way ANOVA and Chi-square test. RESULTS: Fourth generation bonding adhesive system depicted similar bond strength to fifth generation bonding adhesive system. Both fourth and fifth generation exhibited higher shear bond strength as compared to sixth generation bonding adhesive system. CONCLUSION: Fourth and fifth generation exhibited higher shear bond strength as compared to sixth generation bonding adhesive system but the sixth generation has clinically acceptable shear bond strength. Also, it was found that sixth generation leaves less residual adhesive on the tooth after bracket removal.
Assuntos
Colagem Dentária/métodos , Braquetes Ortodônticos , Cimentos de Resina/química , Condicionamento Ácido do Dente/métodos , Adesividade , Bis-Fenol A-Glicidil Metacrilato/química , Esmalte Dentário/ultraestrutura , Análise do Estresse Dentário/instrumentação , Humanos , Cura Luminosa de Adesivos Dentários/métodos , Teste de Materiais , Ácidos Polimetacrílicos/química , Distribuição Aleatória , Resistência ao Cisalhamento , Estresse Mecânico , Propriedades de SuperfícieRESUMO
PURPOSE: To present the clinical features and management of infants presenting with periorbital necrotising fasciitis (NF). METHODS: Retrospective case series. RESULTS: Six children were studied. The age at presentation was in the range of 5-11 months (median, 8 months). All children presented with acute onset eyelid inflammation and necrosis with fever, lethargy and poor oral intake. The management included intravenous antibiotics and repeated surgical debridement. The infection healed by 2-3 weeks in all cases, resulting in cicatricial ectropion and lagophthalmos. Full thickness skin grafting (with a Hughes tarso-conjunctival graft in one child) was performed in all patients at 3-5 weeks subsequently. Repeat surgery was required in three children. Adequate globe coverage and cosmesis was achieved in five children. CONCLUSION: NF of eyelids is a potentially fatal infection that requires urgent and vigorous management and heals with sequelae that may need more than one surgical intervention over a period of time. Adequate cosmetic and functional outcomes can be achieved.
