Aim To evaluate the antibacterial effect of sonic- and ultrasonic-activated irrigation on bacterial reduction a dual-species biofilm in root canals compared to nonactivated laboratory study. Methodology Two hundred forty extracted human single-rooted maxillary anterior teeth were divided into two main groups (G, n = 120) according initial preparation size canal (G1: 25, 0.06 taper, G2: 40, tape...

This case report presents a maxillary third molar with a C-shaped canal system. This is the first known description of a maxillary third molar with C-shaped anatomy. This unique pulp chamber morphology was observed under the operating microscope. Root canal treatment consisted of cleaning and shaping combined with ultrasonic irrigation with sodium hypochlorite. A calcium hydroxide dressing was ...

Stainless steels have good corrosion resistance in many environments but welding or aging can decrease their resistance. This work focused on the effect of aging time and ultrasonic nano-crystal surface modification on the passivation behavior of 316L stainless steel. In the case of slightly sensitized 316L stainless steel, increasing the aging time drastically decreased the pitting potential, ...

Heat dissipation in ultrasonic motors should be limited, especially in precision applications since it causes thermal deformations. Therefore, n easy-to-understand mechanical model was developed to simulate heat dissipation in an ultrasonic motor. This model involves the dielectric, iezoelectric and mechanical hysteretic losses of the piezoelectric material. Both the model and the experiments l...

The aim of this study was to assess the influence micro-computed tomography (micro-CT) voxel size on evaluation debris accumulation after passive ultrasonic irrigation (PUI) in curved root canals prepared with rotary nickel-titanium files. Mesial (n = 24) mandibular molars curvature between 25° and 35° were using ProDesign Logic 30/.05 (PDL) or HyFlex EDM 25/.08 (HEDM). PUI performed canal prep...

The present study investigated the intracanal decontamination and apical extrusion of bacteria debris from root canals instrumented with rotary reciprocating systems (ProDesign Logic or ProDesign R), different file diameters using conventional syringe irrigation (CSI) passive ultrasonic (PUI). Eighty extracted mandibular premolars were contaminated Enterococcus faecalis randomly assigned to eig...

Pangyo experimental catchment is located in Unjung Stream, which is the second tributary of the Tan River, the first tributary of the Han River, as well as Geumto Stream, which is a tributary of Unjung Stream. The area of the entire catchment is 23.1 km, with the Geumto Stream catchment spanning 9.84 km and the Unjung Stream catchment 13.26 km. Four ultrasonic stream gauges, one water level gau...

The removal of necrotic and vital pulp substrates microorganisms their toxins from the root canal system (RCS) has been found to be basis for a successful endodontic treatment. In this study, our aim was evaluate effect passive ultrasonic irrigation (PUI) on elimination organic remnant tissue infected, narrow curved mandibular canals during instrumentation. For purpose, mesiobuccal first molars...