Disclosed are a liquid crystal composition and a liquid crystal display using the same. Optimality is achieved through the ability to capture real time data via a real time interface for each skill-set. At least one cable receiving area is defined between the first and second inner surfaces of the first and second members. The tissue adherence accentuator enables the barrier to adhere to a dental substrate even after polymerization. By contrast, the IBE according to embodiments of the present invention irradiates the Ar ion beam to the substrate only in a predetermined specific angular range.