The purpose of this study was to investigate the anatomical features of C-shaped root canal system in mandibular second molars using micro-computed tomography (microCT). Fifty-eight extracted mandibular second molars with fused roots were collected from a native Chinese population. The teeth were scanned into layers of 0.5-mm thickness by microCT and measurements were made at eleven levels. The...

BACKGROUND AND OBJECTIVES Natural orifice transluminal endoscopic surgery involves the introduction of instruments through a natural orifice into the peritoneal cavity to perform diagnostic and therapeutic surgical interventions. We report the utilization of the vaginal opening at the time of laparoscopic-assisted vaginal hysterectomy or total laparoscopic hysterectomy as a natural orifice for ...

Thermal properties of cryogenic fluids can profoundly change the nature cavitation since fluid pressure drop is not, anymore, only driving parameter this phenomenon. In research, we have conducted experiments inducing via a cylindrical orifice using Liquid Nitrogen as working and exploring regimes going from bubbly to full flashing. Among others, performed unsteady measurements derive speed sou...

As a successive alkalinity-producing system pond for purifying mine drainage is operated, sediment accumulates in the limestone layer of pond, and as amount accumulated increases, water permeability treatment efficiency decrease. Hence, flushing required, comprising network perforated pipes installed layers, to periodically discharge outside. The performance depends on four distinct characteris...

We present the results of both experimental and numerical investigations silo discharge for a cohesive granular material. In our study, thanks to cohesion-controlled material (CCGM) we propose investigate effect length l c , on two different configurations, one axisymmetrical, quasi-2D rectangular silo. an adjustable bottom is used control size orifice. As observed cohesionless by previous stud...

BACKGROUND AND OBJECTIVES New technology has allowed us to perform major abdominal and pelvic surgeries with increasingly smaller instruments. The ultimate goal is surgery with no visible scars. Until current technical limitations are overcome, minilaparoscopy-assisted natural orifice surgery (MANOS) provides a solution. The aim of this study was to examine our clinical and experimental experie...