FORCE DIRECTION USING MINISCREWS IN SLIDING MECHANICS DIFFERENTIALLY AFFECTED MAXILLARY CENTRAL INCISOR RETRACTION: FINITE ELEMENT SIMULATION AND TYPODONT MODEL

Background/purpose: En masse retraction was still controversy in orthodontics.The aim of this study was to investigate the effect of force directions created by different miniscrew positions and lever arm heights on maxillary central incisor movement using Finite Element (FE) simulation and a Typodont model.Materials and methods: A typodont model a

Two different systems have been built to study the geomagnetic field effect on the performance of large area photomultiplier tubes.The main characteristics of photomultiplier tubes such as Krumkake/Pizzelle Irons gain, collection efficiency, transition time spread and energy resolution were measured to investigate the effect.This study shows that b

The optimization issues connected to a landing task of an unmanned aerial vehicle are discussed in the paper, based on a model of a mini-class drone.Three landing scenarios are considered, including minimum-time landing, landing with minimum energy consumption, and planned landing.With the use of classical dynamic programming techniques, including

We examine the impact of Oven Fan Motor the pandemic on religiosity and attitudes towards the Catholic Church in Spain.The author analyzes Spanish religious life and defines its specificity in the context of global transformations of the pandemic era, based on the researches of leading sociological centers.It would seem that in the face of a mortal