Effect of whitening mouth rinses on the chemical and physical properties of a nanofilled composite

Aim: This study analyzed the effect of whitening mouth rinses on water sorption (WS), solubility (SL), color change, and surface roughness of a nanofilled composite. Whitening perceptibility and acceptability (WID) were also studied. Methods: Forty specimens of Filtek Z350XT, shade EA2 were produced and randomly distributed (n=8) to AS ­ artificial saliva (control); LWE ­ Listerine Whitening Extreme; CLW ­ Colgate Luminous White; LCM ­ Listerine Cool Mint; and CP ­ Colgate Plax. They were immersed in the mouth rinses 2x/day, for one minute, during 28 days. The color was assessed using an Easyshade spectrophotometer (CIE-L*a*b* system). Surface roughness (Ra-µm) was measured with three parallel measures, using an RP-200 roughness meter. The WS and SL (µg/mm-3) were analyzed based on the ISO 4049 recommendations. The data were analyzed using one- and two-way ANOVA/Tukey tests (α=0.05). Results: Surface roughness significantly increased after immersion in AS and LCM, with no significant differences between the groups either before or after immersion. The ΔE* was not significantly different between the groups. All substances produced a ΔWID higher than the 50%:50% perceptibility and acceptability thresholds. The WS and SL were not significantly affected by the mouth rinses. Conclusion: Whitening mouth rinses did not affect WS, SL, surface roughness, and color stability of a nanofilled composite, regardless of the presence of ethanol in the composition

Goldenhar Syndrome in a pediatric patient: a case report and review of literature / Síndrome de Goldenhar em um paciente infantil: relato de caso e revisão da literatura

ABSTRACT Goldenhar Syndrome is a rare, generally sporadic condition, whose physical manifestations include asymmetric incomplete facial development, epibulbar dermoids, auricular malformations e auricular appendices, vertebral anomalies, central nervous system disturbances, ocular irregularities and visceral abnormalities. Its etiology is not fully understood, with its incidence ranging from 1:3500 to 1:5600 live births, and a gender ratio of 3:2 (male: female), presenting more frequently in children with congenital deafness. The purpose of this case report was to describe clinical presentation of Goldenhar syndrome in a five-year old male with no significant family history, where almost all of the classic signs of the condition were present. Considering its involvement in craniofacial structures, its rarity, and its wide spectrum of symptoms and associated systemic abnormalities, knowledge of this condition is paramount for the dental surgeon.

RESUMO A Síndrome de Goldenhar é rara e suas principais manifestações físicas incluem assimetria e desenvolvimento facial incompleto, tumores dermoides epibulbares, malformações na orelha e apêndices auriculares, anomalias vertebrais, distúrbios no sistema nervoso central, irregularidades oculares e anomalias viscerais. A etiologia desta condição não é claramente esclarecida e apresenta-se geneticamente variável. A incidência da Síndrome de Goldenhar pode variar de 1:3500 até 1:5600 nascidos vivos e relação por sexo de 3:2 (masculino: feminino), apresentando mais frequentemente em crianças com surdez congênita. O objetivo deste trabalho é apresentar um caso clínico de Síndrome de Goldenhar em paciente infantil de 5 anos de idade do sexo masculino, sem história familiar relevante relacionada à síndrome e que apresenta características claras desta condição. Considerando o envolvimento das estruturas craniofaciais da Síndrome de Goldenhar, sua raridade e o amplo espectro de sintomas e anormalidades sistêmicas associadas, o conhecimento desta condição é primordial para o cirurgião-dentista.