Cleaning of long oval canals with WaveOne Gold system associated with different irrigant agitation protocols

Aim: The aim of the study was to evaluate the cleaning of mandibular incisors with WaveOne Gold® (WO) under different preparation techniques. Methods: A total of 210 human mandibular incisors were selected and divided into seven groups (n = 30), prepared by WO single-files (Small 20/.07 ­ WOS; Primary 25/.07 ­ WOP; Medium 35/.06 ­ WOM; or Large 45/.05 - WOL) and sequential-file techniques (WOS to WOP; WOS to WOM; and WOS to WOL). Further subdivision was made according to irrigation protocol: control group (manual irrigation - CON), E1 Irrisonic® - EIR, and EDDY® - EDD. Debris removal and the smear layer were evaluated by scanning electron microscopy. Data were analyzed by using Spearman's correlation test. The significance level was set at 5%. Results: For debris and smear layer removal, WOS and WOP, EIR differed from CON and EDD (p <0.05). Conclusion: Regardless of the instrumentation used, the agitation of the irrigant solution provided better cleanability. These findings reinforce the need for agitation techniques as adjuvants in cleaning root canal systems in mandibular incisors

A individualização de coroas como alternativa para as próteses totais fixas sobre implantes / The individualization of crowns as an alternative for implant-supported fixed partial dentures

A reabilitação fixa de pacientes desdentados totais com próteses conhecidas como protocolo de Brånemark é uma alternativa indicada com grande previsibilidade e um bom prognóstico nas reabilitações com implantes osseointegrados. Essas próteses proporcionam maior eficiência mastigatória, conforto e estética, quando comparadas a próteses removíveis convencionais. Tradicionalmente, essa modalidade reabilitadora protética é confeccionada com dentes e gengiva em resina acrílica, o que favorece o acúmulo de biofilme. Além disso, apresentam degradação e desgaste, principalmente dos dentes, o que contribui para a perda da dimensão vertical de oclusão e perda da estabilidade oclusal. No intuito do controle das desvantagens apresentadas, uma alternativa utilizada é a individualização dos dentes com coroas cerâmicas. As coroas individuais, além de atribuírem melhor estética para a reabilitação, também são responsáveis por melhor passividade, longevidade, possibilidade de reparos e estabilidade oclusal.

The rehabilitation of completely edentulous patients with fixed restorations known as Brånemark protocol is an alternative with great predictability and good prognosis in the field of dental implants. These restorations provide better masticatory efficiency, comfort, and esthetics, when compared to the conventional removable dentures. In general, this prosthetic modality receives artificial gingiva and acrylic teeth, which favors plaque buildup. besides, degradation and wear can be seen, particularly at teeth, contributing to the loss of vertical occlusal dimension and stability. For this, an alternative is to provide individual ceramic crowns. Besides providing better esthetics, passivity, longevity, stability, and the chance of repair are possible in this scenario.