RESUMO
BACKGROUND: String-like mobile echodensities (SLMEs) are sometimes found on postoperative duplex ultrasound (DUS) performed after carotid endarterectomy (CEA); however, they may not be visible on intraoperative DUS. The reasons for these echo findings and associated clinical course remain unknown. METHODS: Routine postoperative DUS evaluation after CEA was retrospectively examined in 101 consecutive patients (107 lesions) who underwent CEA between April 2015 and December 2021, at our institution. RESULTS: Ten SLMEs were identified in eight patients. All SLMEs were 1-3 mm long, mobile, and extended straight from the intima-media complex of the wall of the common carotid artery or carotid bulb. Most lesions resolved spontaneously; a few lesions were observed repeatedly, albeit not causing cerebral infarction or transient ischemic attacks. CONCLUSIONS: SLMEs can be observed in a small percentage of patients after CEA, and they do not seem to be of clinical significance.
Assuntos
Estenose das Carótidas , Endarterectomia das Carótidas , Artérias Carótidas/cirurgia , Estenose das Carótidas/diagnóstico por imagem , Estenose das Carótidas/cirurgia , Humanos , Estudos Retrospectivos , Resultado do Tratamento , Ultrassonografia Doppler DuplaRESUMO
From a selection of four kinds of post and core systems, including a fiber post and composite resin core, the purpose of this study was to determine the most effective system for the restoration of endodontically treated teeth with 0 mm of coronal tooth structure. For experimental abutment teeth, typical human maxillary central incisor teeth were modeled using bovine mandibular incisor teeth. By means of a static loading test, the four restoration systems were evaluated and compared in terms of failure load and failure mode. Further, by means of a cyclic loading test, these systems were assessed in terms of durability. For fiber post and composite resin core, it excelled from the standpoints of failure load and failure mode, and fared favorably too in durability after cyclic loading test. For composite resin post-and-core, it also showed excellent results for both failure load and failure mode in static loading test, but durability significantly decreased with cyclic loading. Taken together, the fiber post and composite resin core was found to be most effective from the standpoints of failure load, failure mode, and durability.
Assuntos
Resinas Compostas/química , Materiais Dentários/química , Técnica para Retentor Intrarradicular/instrumentação , Animais , Compostos de Boro/química , Bovinos , Dente Suporte , Ligas Dentárias/química , Corrosão Dentária , Planejamento de Prótese Dentária , Falha de Restauração Dentária , Vidro/química , Ligas de Ouro/química , Humanos , Teste de Materiais , Metacrilatos/química , Metilmetacrilatos/química , Modelos Animais , Cimentos de Resina/química , Estresse Mecânico , Dente não Vital/terapiaRESUMO
Research using low frequency atmospheric pressure plasma jets (LF jet) is becoming increasingly more common. We carried out experiments to evaluate the sterilizing effects of this technology on oral pathogenic microorganisms (S.mutans, C.albicans and E. faecalis) and to determine its potential for clinical application. We performed the direct exposure test on a solid surface, indirect exposure test on a liquid phase, and ROS (reactive oxygen species) inhibitory test. The results showed the LF jet had microbicidal effects on oral pathogens, and that the ROS influenced this sterilization effect. The experiments of this study revealed that LF jet had a sterilizing effect on oral pathogenic microorganisms present in both the solid and liquid phases. The sterilizing mechanism was considered to be related to the effect of superoxide anion radicals. These results indicate that LF jets may represent a novel technology that can be applied to the field of clinical dentistry.