Fractures of multiple permanent anterior teeth can be a traumatic experience for children, with functional, esthetic and psychological aspects.The treatment of complicated crown-root fractures (CRFs) is more challenging when the biologic width is violated.This paper presents Turning Table a case of 12-year boy with complicated CRF of teeth #12 and
Metamaterials have been attracting tremendous interests due to their exotic electromagnetic characteristics, such as sub-wavelength imaging and Clothing invisibility cloak.However, the appreciable loss arising from the inherent resonant nature of metamaterials plagues many of their engineering applications.In this paper, we derive the condition for
Traditional aero-engine bearings rotate simultaneously with their inner and outer rings, which makes the temperature rise prediction model computationally large with low accuracy, and it cannot be accurately verified due to the means of testing.This paper presents a method for predicting the temperature rise characteristics of aero-engine bearings