Daniela Nascimento Silva

Enucleation and Liquid Nitrogen Cryotherapy in the Treatment of Keratocystic Odontogenic Tumors: A Case Series

PURPOSE This study describes the technique of lesion enucleation without capsule disruption combined with liquid nitrogen cryotherapy in the surgical treatment of keratocystic odontogenic tumors (KOTs). PATIENTS AND METHODS Eight patients (9 KOTs) were included in the study. After enucleation, liquid nitrogen was applied twice for 1 minute, with 5-minute intervals between applications. The patients were followed up for 3 to 9 years. RESULTS There were no recurrences during the follow-up of 9 KOTs for up to 9 years. Only 1 patient had temporary reversible loss of lip sensation after treatment. There were no pathologic fractures. In all cases bone height at the surgical site was restored, and no patients needed bone reconstruction for post-treatment rehabilitation. CONCLUSIONS This study confirmed the efficiency of KOT treatment enucleation without fragmentation combined with liquid nitrogen cryotherapy at the surgical site.

Enamel-Renal-Syndrome: case report: RARE ENAMEL-RENAL-SYNDROME REPORT

AIMS to describe a case in which dental changes were observed and investigation proceeded to consider Enamel-Renal-Syndrome (ERS), a rare disorder that associates amelogenesis imperfecta with nephrocalcinosis. CASE REPORT an 11-year-old male patient upon intraoral examination revealed generalized gingival hyperplasia, a few teeth were absent clinically and the remaining ones were yellowish-brown in color. The enamel alterations were suggesting of amelogenesis imperfecta. Unerupted teeth with increased pericoronal spaces, suggesting hyperplasic follicles or dentigerous cysts and an enamel with lower thickness and density were observed in the panoramic radiography. The patient was referred for an assay to investigate mucopolysaccharidosis; however, it was negative. A renal ultrasound showed bilateral nephrocalcinosis and laboratory exams, including calcium, phosphate, and creatinine levels were below the average. An incisional gingival biopsy showed numerous round to ovoid basophilic calcifications in the connective tissue. The final diagnosis was ERS. CONCLUSION Dentists should refer patients with similar clinical presentation for renal ultrasound evaluation in order to rule out the possible diagnosis of ERS.

Efeito de diferentes fotopolimerizadores e meio de imersão na rugosidade e na cor de um compósito nanoparticulado

Introducao O consumo excessivo de refrigerantes parece alterar as propriedades dos compositos e essa alteracao pode estar relacionada a unidade fotopolimerizadora. Objetivo Avaliar a alteracao da rugosidade superficial (ΔR) e da cor (ΔE) de um composito polimerizado por diferentes fotopolimerizadores, imerso em agua destilada ou Coca-Cola®. Metodologia Sessenta amostras da resina nanoparticulada (FiltekMR Z350 XT, 3M) foram distribuidas de acordo com as diferentes unidades de fotopolimerizacao: a) luz halogena de quartzo-tungstenio-halogenio (QTH); b) Luz de Emissao Diodo - LED 1 com ponteira de polimero; c) LED 2 com ponteira de fibra otica. Metade de cada grupo (n=10) foi mantida em agua destilada ou imersa em Coca-Cola® 2×/dia por 20 minutos, durante 14 dias. Os dados foram submetidos aos testes Mann-Whitney e Kruskal-Wallis (p≤0,05). Resultado A ΔR nao foi significante entre os grupos: em agua: QTH = 0,006; LED 1 = 0,019; LED 2 = 0,010 (p=0,33); em refrigerante: QTH = 0,021; LED 1= 0,011; LED 2 = 0,030 (p=0,86). A ΔE nao foi significativa entre os fotopolimerizadores: em agua: QTH = 1,40; LED 1 = 1,80; LED 2 = 1,60 (p=0,31); em refrigerante: QTH = 2,51; LED 1= 1,91; LED 2 = 2,61 (p=0,41), mas foi significante comparando os meios de imersao (p=0,01), exceto para LED 1 (p=0,54). Conclusao As unidades fotopolimerizadoras nao interferiram na rugosidade superficial e na cor da resina composta nanoparticulada. Os mergulhos diarios em refrigerante nao alteraram a lisura, mas alteraram a cor de modo visualmente perceptivel, mas clinicamente aceitavel, conforme os parâmetros da literatura cientifica.