Florid cemento-osseous dysplasia and osteomyelitis: a case report of a simultaneous presentation / Displasia cemento-óssea florida e osteomielite: relato de caso de uma apresentação simultânea

PURPOSE: To report a case of florid cemento-osseous dysplasia (FCOD) and chronic diffuse sclerosing osteomyelitis (CDSO) in a simultaneous presentation, emphasizing the significance of differential diagnosis and appropriate management of these conditions. CASE DESCRIPTION: A female, 69 years old, black patient had a complaint of itching and pain in posterior left mandibular region. The patient had a yellowish hard mass throughout all quadrants of the jaws. A panoramic radiograph showed a lobular, diffuse and irregular radiopaque lesion. Based on clinical and histopathological findings, the diagnosis was FCOD associated with secondary osteomyelitis. CONCLUSION: This report reinforces the need of accurate assessment of clinical, radiographic and histopathological aspects for the diagnosis and correct selection of treatment in cases of combined lesions.

OBJETIVO: relatar um caso de displasia cemento-óssea florida (DCOF) e osteomielite esclerosante difusa crônica (OEDC) em uma apresentação simultânea, enfatizando a importância do diagnóstico diferencial e adequado manejo dessas condições. DESCRIÇÃO DO CASO: Uma paciente do sexo feminino, 69 anos de idade, de cor negra, tinha uma queixa de dor e coceira na região esquerda da mandíbula. A paciente apresentava uma massa dura amarelada envolvendo todos os quadrantes dos maxilares. Foi obtida uma radiografia panorâmica, revelando lesão radiopaca lobular, difusa e irregular. Com base nos aspectos clínicos e histopatológicos, o diagnóstico foi de DCOF associada com osteomielite secundária. CONCLUSÃO: esse relato reforça a necessidade de uma avaliação precisa dos aspectos clínicos, radiográficos e histopatológicos para o diagnóstico e seleção correta de tratamento em casos de lesões combinadas.

Effect of fluoride-containing desensitizing agents on the bond strength of resin-based cements to dentin

OBJECTIVE: The objective of this study was to evaluate the effect of desensitizing agents containing different amounts of fluoride on the shear bond strength of a dual polymerized resin cement and a resin-modified glass ionomer cement (RMGIC) to dentin. MATERIAL AND METHODS: One hundred human molars were mounted in acrylic resin blocks and prepared until the dentin surface was exposed. The specimens were treated with one of four desensitizing agents: Bifluorid 12, Fluoridin, Thermoline and PrepEze. The remaining 20 specimens served as untreated controls. All groups were further divided into 2 subgroups in which a dual polymerized resin cement (Bifix QM) or a resin-modified glass ionomer cement (AVANTO) was used. The shear bond strength (MPa) was measured using a universal testing machine at a 0.5 mm/min crosshead speed. The data were analyzed statistically with a 2-way ANOVA, Tukey HSD test and regression analysis (α=0.05). The effect of the desensitizing agents on the dentin surface was examined by scanning electron microscopy. RESULTS: The fluoride-containing desensitizing agents affected the bond strength of the resin-based cements to dentin (p<0.001). PrepEze showed the highest bond strength values in all groups (p<0.001). CONCLUSION: Regression analysis showed a reverse relation between bond strength values of resin cements to dentin and the amount of fluoride in the desensitizing agent (p<0.05).