Because of its low flexural strength (due to its translucency) the requirements for margin, wall and connector thickness are very high. Hardly anyone sticks to the manufacturer's instructions when designing. The more translucent the material, the thicker the margin, wall and connector thicknesses have to be - due to the decreasing flexural strength. However, the stability of the material cannot be guaranteed without compliance with the manufacturer's instructions.
Another challenge is the fixed colour gradient due to the industrial colouring of the milling blank. In bridges with a strong Spee curve, for example, there are unsightly results in the colour gradient. Depending on the height of the blank and crowns, unsatisfactory results may also occur here.