RESUMO
ABSTRACT Oral lymphoepithelial cyst (OLEC) is an uncommon lesion whose pathogenesis remains poorly understood. The purpose of this paper is to report a case of OLEC. Female patient, white, 62 years old, presented asymptomatic nodular swelling of soft consistency in the lateral border of the tongue. Under the clinical hypothesis of lymphoid tissue hyperplasia, an excisional biopsy was performed. Histopathological examination revealed a pathological epithelial-lined cavity and a cystic connective tissue capsule containing lymphoid tissue. The diagnosis of OLEC was established and the patient showed no signs of recurrence after surgical removal of the lesion.
RESUMEN El quiste linfoepitelial (QLE) oral es una lesión infrecuente, cuya patogénesis es aún poco conocida. El objetivo del presente estudio es reportar un caso de QLE oral. Mujer blanca de 62 años presentó un crecimiento nodular asintomático de consistencia blanda, en borde lateral de la lengua. Bajo la hipótesis clínica de hiperplasia del tejido linfoide, se realizó una biopsia excisional. El examen histopatológico reveló cavidad patológica revestida de epitelio y una cápsula quística de tejido conectivo, conteniendo tejido linfoide. Se estableció el diagnóstico de QLE oral. La paciente no ha presentado recidiva tras extirpación quirúrgica de la lesión.
RESUMO O cisto linfoepitelial oral (CLEO) é uma lesão incomum, cuja patogênese ainda é pouco elucidada. O objetivo deste estudo é relatar um caso de CLEO. Paciente do sexo feminino, leucoderma, 62 anos, apresentou aumento de volume nodular assintomático de consistência amolecida, em borda lateral da língua. Sob a hipótese clínica de hiperplasia de tecido linfoide, biópsia excisional foi realizada. O exame histopatológico revelou cavidade patológica revestida por epitélio e uma cápsula cística de tecido conjuntivo, contendo tecido linfoide. O diagnóstico de CLEO foi estabelecido. A paciente não apresentou sinais de recidiva após a remoção cirúrgica da lesão.
RESUMO
BACKGROUND: This study aimed to evaluate the influence of surface treatments on the bond strength between a zirconia-based ceramic and two resin cements. METHODS: Eighty blocks (5.25×3.74×4.5 mm) of a zirconia-based ceramic were divided into eight groups (N.=10) according to the factors "surface treatment" (air-particle abrasion with Al2O3 or Al2O3/SiO2 and zirconia primer) and "cement" (conventional resin cement and self-adhesive resin cement). After the surface treatments, cylinders of each resin cement (Ø=3.5 mm, height: 3 mm) were built up on the zirconia surface and photo-activated (40 s). The samples were stored in water for 30 days at 37 °C, followed by shear bond strength test in a universal testing machine (1 mm/min). Data were analyzed by ANOVA and Tukey test (α=0.05). RESULTS: Regarding the surface treatments, all strategies were statistically different from each other. The Cojet achieved the higher bond strength values, followed by Signum Zirconia Bond. The resin cements were also statistically different from each other, since the U200 achieved higher bond strength values. The interaction between the factors was also significant. Most of the failures were adhesive and mixed. CONCLUSIONS: Regardless of the cement used, the air-particle abrasion with alumina coated by silica particles improved bond strength.
