Wol-Ceram® Copings- These high-density, cementable alumina copings are beautifully shaded to match your final ceramic overlay porcelain. The following porcelains can be used to overlay a Wol-Ceram coping: VITA Vitadur Alpha and LM7, Noritake Cerabien, Jensen Creation AV, Ducera AllCeram, Shofu Vintage AL, and Nobel Biocare NobelRondo Alumina. Wol-Ceram requires a conservative preparation using either featheredge, chamfer or shoulder margins with a 1.5 mm tooth reduction. Indicated for single-unit crowns and 3-unit bridges anywhere in the mouth. Wol-Ceram is a registered trademark of Wolz Dental-Technik GmbH.