Mucoadhesive, Thermoreversible Hydrogel, Containing Tetracaine-Loaded Nanostructured Lipid Carriers for Topical, Intranasal Needle-Free Anesthesia.

Recent advances have been reported for needle-free local anesthesia in maxillary teeth by administering a nasal spray of tetracaine (TTC) and oxymetazoline, without causing pain, fear, and stress. This work aimed to assess whether a TTC-loaded hybrid system could reduce cytotoxicity, promote sustained permeation, and increase the anesthetic efficacy of TTC for safe, effective, painless, and prolonged analgesia of the maxillary teeth in dental procedures. The hybrid system based on TTC (4%) encapsulated in nanostructured lipid carriers (NLC) and incorporated into a thermoreversible hydrogel of poloxamer 407 (TTCNLC-HG4%) displayed desirable rheological, mechanical, and mucoadhesive properties for topical application in the nasal cavity. Compared to control formulations, the use of TTCNLC-HG4% slowed in vitro permeation of the anesthetic across the nasal mucosa, maintained cytotoxicity against neuroblastoma cells, and provided a three-fold increase in analgesia duration, as observed using the tail-flick test in mice. The results obtained here open up perspectives for future clinical evaluation of the thermoreversible hybrid hydrogel, which contains TTC-loaded NLC, with the aim of creating an effective, topical, intranasal, needle-free anesthesia for use in dentistry.

Cisto dentígero com transformação ameloblástica / Quiste dentígero con transformación ameloblástica / Dentigerous cyst with ameloblastic transformation

Introdução: O cisto dentígero se origina pela separação do folículo que fica ao redor da coroa de um dente incluso. É o tipo mais comum de cisto odontogênico do desenvolvimento. O seu crescimento é lento, assintomático, e pode atingir grandes dimensões. Objetivo: Relatar um caso clínico cirúrgico de cisto dentígero com transformação ameloblástica, localizado na mandíbula, de paciente, gênero feminino, melanoderma, 14 anos. Caso clínico: Ao exame radiográfico apresentou área radiolúcida unilocular com margem bem definida e esclerótica envolvendo a coroa das unidades 48 e 47. Foi realizada enucleação e curetagem da lesão com exodontia destas unidades sob anestesia local em ambulatório, e aplicada a crioterapia na loja óssea. Encaminhou-se o conteúdo da lesão para exame histopatológico e o diagnóstico de cisto dentígero com transformação ameloblástica foi fechado. Comentários principais: No momento a paciente encontra-se em acompanhamento pós-operatório de 3 anos com neoformação óssea e sem recidivas(AU)

Introducción: El quiste dentígero se origina por la separación del folículo que se queda alrededor de la corona de un diente no erupcionado. Es el tipo más común de quiste odontogénico de desarrollo. Su crecimiento es lento, asintomático y puede alcanzar grandes dimensiones. Objetivo: Reportar un caso quirúrgico de quiste dentígero con transformación ameloblástica. Presentación del caso: Paciente femenina de 14 años, de color de piel negra. La radiografía demostró una radiolucidez unilocular con márgenes bien definidos que envolvían la corona de los dientes 48 y 47. El tratamiento involucró una combinación de enucleación y curetaje de la lesión, exodoncia de los dientes y crioterapia para desvitalizar el hueso circundante. Se realizó el examen histopatológico, luego, se confirmó el diagnóstico de quiste dentígero con transformación ameloblástica. Conclusiones: Al momento de la redacción del reporte la paciente se encontraba en seguimiento posoperatorio de tres años con neoformación ósea y sin recidivas(AU)

Introduction: Dentigerous cysts are caused by the separation of the follicle remaining around the crown of unerupted teeth. They are the most common type of developmental odontogenic cyst. Their growth is slow and asymptomatic, and they may reach large dimensions. Objective: Report a surgical case of dentigerous cyst with ameloblastic transformation. Case presentation: A case is presented of a black female 14-year-old patient. Radiography revealed an area of unilocular radiolucency with well-defined margins enveloping the crowns of teeth 48 and 47. Treatment was a combination of enucleation and curettage of the lesion, exodontia of the teeth and cryotherapy to devitalize the surrounding bone. Eventual histopathological examination confirmed the diagnosis of dentigerous cyst with ameloblastic transformation. Conclusions: At the time when the report was written, the patient had been followed up for three years after surgery, showing bone neoformation and no recurrence of the lesion(AU)

Regional Odontodysplasia Affecting the Maxilla.

Regional odontodysplasia (RO) is a rare dental anomaly of unknown etiology that can affect both deciduous and permanent dentition. RO is characterized by severe hypoplasia of enamel and dentin, and teeth affected are friable and more susceptible to caries and fractures. Most of the lesions occur in the anterior maxilla and correlation with clinical and radiographic features is essential to provide a correct diagnosis. The major criteria for diagnosis are predominantly based on radiography, which shows presence of large pulp chambers and a marked reduction in the radiopacity of enamel and dentin, making the distinction between these mineralized structures difficult. Early diagnosis is important to minimize future sequels and allow preventive or conservative treatment. The therapeutic approach of the RO should be based on the degree of severity of the anomaly and in the individual functional and aesthetic needs of each case. A classic case of RO affecting the maxilla is exemplified in this Sine Qua Non Radiology-Pathology article.