introduction: all instrumentation techniques have been reported to be associated with extrusion of infected debris. the aim of this study was to evaluate the number of bacteria extruded apically from extracted teeth ex vivo after canal instrumentation using the two engine-driven techniques utilizing nickel-titanium instruments (flex master and mtwo). materials and methods: seventy extracted max...

INTRODUCTION Root canal irrigation carries a risk of extrusion of irrigant into the periapical tissues. The objective of this study was to compare different irrigation systems in matched pairs of teeth prepared to an apical size of 35.06 and 50.06 by measuring the frequency and extent of apical extrusion of sodium hypochlorite (NaOCl) into a simulated periapical environment. The null hypothesis...

We conducted a longitudinal study (duration 2 years), including 294 individuals (mean age 45 years, 58% female), in order to examine associations between meniscal extrusion, knee structure, radiographic changes and risk factors for osteoarthritis (OA) in a largely non-osteoarthritic cohort. Meniscal extrusion, tibiofemoral cartilage defect score and cartilage volume, and tibial plateau bone are...

Objective: The aim was to evaluate the effect of root canal geometry on amount apical extrusion irrigant, by testing different tapers and needle types. Materials Method: Forty-three extracted single-rooted human mandibular premolar teeth were accessed. Experimental groups instrumented produce increasing amounts taper in each successive group: Group 1 (#25/.02), 2 (#25/.04), 3 (#25/.06), 4 (#25/...

This work presents an in-situ quality assessment and improvement technique using point cloud AI for data processing smart decision making in Additive Manufacturing (AM) fabrication to improve the accuracy of fabricated artifacts. The top surface point-cloud containing geometry information is pre-processed passed improved deep Hybrid Convolutional Auto-Encoder decoder (HCAE) model used statistic...

3D ink-extrusion of powders followed by sintering is an emerging additive manufacturing method capable creating metallic microlattices. Here, we study the creation hierarchically porous Fe or Ni scaffolds extrusion 0/90° lattices from inks consisting fine oxide (Fe2O3 NiO, < 3 µm), coarse space-holder particles (CuSO4, 45 µm) and a polymer binder within solvent. After leaching debinding lattice...

The antiapoptotic protein Bcl-2 plays important roles in Ca(2+) signaling by influencing inositol triphosphate receptors and regulating Ca(2+)-induced Ca(2+) release. Here we investigated whether Bcl-2 affects Ca(2+) extrusion in pancreatic acinar cells. We specifically blocked the Ca(2+) pumps in the endoplasmic reticulum and assessed the rate at which the cells reduced an elevated cytosolic C...

Spine Ca 2 triggers the induction of synaptic plasticity and other adaptive neuronal responses. The amplitude and time course of Ca 2 signals specify the activation of the signaling pathways that trigger different forms of plasticity such as long-term potentiation and depression. The shapes of Ca 2 signals are determined by the dynamics of Ca 2 sources, Ca 2 buffers, and Ca 2 extrusion mechanis...

In-situ TiB whisker-reinforced Ti-6Al-4V (TC4) titanium matrix composites (TiBw/TC4) with quasi-continuous networks were successfully fabricated by vacuum hot-pressing sintering. The effects of the hot-hydrostatic canned extrusion on stock utilization, microstructure and mechanical properties of the TiBw/TC4 composites were investigated. It was satisfactory that the utilization of composites co...

A severe plastic deformation process, termed accumulative extrusion bonding (AEB), is conceived to steady-state bond metals in the form of multilayered tubes. It shown that AEB can facilitate their solid-state, like process roll (ARB). The steps involve iterative extrusion, cutting, expanding, restacking, and annealing. As iterated, laminated structure layer thicknesses decrease within tube wal...