3results about How to "Improve facial shape" patented technology

This application discloses a fixed-focus lens, characterized in that it comprises, sequentially from the object side to the image side along the optical axis: a first lens with negative optical power, wherein its object side is convex and its image side is concave; a second lens, wherein its object side is concave and its image side is convex; a third lens with negative optical power, wherein its object side is concave and its image side is convex; a fourth lens with positive optical power, wherein its object side is convex and its image side is concave; a fifth lens with positive optical power, wherein its object side is convex and its image side is convex; a sixth lens with positive optical power, wherein its object side is convex and its image side is convex; a seventh lens with negative optical power, wherein its object side is concave and its image side is concave; an eighth lens with positive optical power, wherein its object side is convex and its image side is convex; a ninth lens, wherein its object side is concave and its image side is convex; and a tenth lens, wherein its object side is convex and its image side is concave; the fixed-focus lens comprises ten lenses with optical power.

The invention provides a preparation method of an oral three-dimensional occlusion induction type high-angle bone face type appliance, which comprises the following steps: acquiring upper and lower jaw dentition digital models of a child patient, constructing upper and lower jaw tooth digital models of the child patient after occlusion reconstruction of the upper and lower jaws, and then designing a back tooth occlusion relation and a maximum occlusion contact mode after occlusion reconstruction, a design scheme of the invisible tooth socket containing the gap part is obtained, and a design scheme of the flexible filler is constructed. The invisible tooth socket containing the gap part prepared according to the design scheme can be independently used and can also be matched with flexible filler for use. The orthodontic appliance can solve the technical problem that the existing orthodontic appliance is difficult to simultaneously and effectively control the perpendicularity and inclination of front and rear teeth, adjust occlusion induction and tooth uniformity and adjust the inclination of an occlusion plane during deciduous tooth shedding and permanent tooth eruption of a child patient.

The present application provides a polishing liquid, which comprises abrasive and oxidizing agent; the oxidizing agent comprises the following raw materials: vanadium compound solution 0.1-35wt%; pH value regulator 0.001%-10wt%; flocculating agent 0.001%-10wt%; humectant 0.001%-15wt%; salt 0.001%-8wt%; water balance. The present application can polish the carbon face and silicon face of silicon carbide by the selection of vanadium compound solution, the cooperation of the rest auxiliary agents and the use of abrasive in the polishing liquid, and ensures the removal rate under the condition of less than 0.1 nanometer surface roughness.