1.The new design adopts a hard plastic core and iscovered with silicone tentacles to form a balance ofhardness and elasticity. 2.Soft on the outside and hard on the inside to protect thegums from bleeding. 3.The elliptical inner core has strong toughness, and it canadapt to various gaps between adjacent teeth whencombined with silica gel, so that the matrix band fitsclosely to the tooth body.
